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In programming, there are times you have to convert one data type to another. This is known as "type casting".

Type casting is when you assign a value of one primitive data type to another type.

In Java, there are two types of casting:

Widening Casting

Widening casting is done automatically when passing a smaller size type to a larger size type:

Try it Yourself »

Narrowing Casting

Narrowing casting must be done manually by placing the type in parentheses () in front of the value:

Real-Life Example

Here's a real-life example of type casting where we create a program to calculate the percentage of a user's score in relation to the maximum score in a game.

We use type casting to make sure that the result is a floating-point value, rather than an integer:

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What is Boxing in Java?

Boxing refers to the conversion of any one of the eight primitive data types available in Java ( boolean , byte , short , char , int , long , float , and double ) to the corresponding wrapper classes ( Boolean , Byte , Short , Character , Integer , Long , Float , and Double ). These classes allow developers to perform certain functions on data types.

A wrapper class is simply a reference type that contains the value of the given primitive type in its field. Programmers can create an object of a wrapper class by assigning the value of a given type to it.

Here is an example of how to use a wrapper class in Java:

In earlier of versions of Java, it was possible to create a wrapper class by passing the primitive value as a constructor, as shown in the following example code:

This approach is now deprecated, however. Developers may find this approach if you do some research online. Therefore, it is worth mentioning it so that you are aware in case your compiler throws an error.

You can learn more about constructors in our tutorial: Intro to Using Constructors in Java .

Developers can also create a numerical wrapper class from a string . The parseXXX method allows you to achieve this. XXX can be any of the following: Short , Character , Integer , Long , Float , and Double .

What is Unboxing in Java?

Just as the name suggests, in Java, unboxing is the reverse of boxing. To unbox a reference type r (i.e get its value), simply use the syntax below:

The string xxx above represents any of the following: Boolean , Byte , Short , Char , Int , Long , Float , or Double .

For example, to get an integer value y from an integer wrapper class, you would use the follow example code in Java:

How to Perform String Conversion in Java

A lot of times when programming, programmers will need to use strings . Therefore, it is important to know how to convert different types to string values.

It is worth noting that you can convert all types (including objects) into a string . First, you need to convert any primitive type (if any) to a reference type. After that, you can convert it to a string using the toString() method.

Here is an example of how to use the toString() method in Java:

It is also possible to pass your primitive type as an argument to the toString() method in order to convert it to a string value, as shown in this code example:

You can learn more about working with primitive data types in our tutorial: Java Primitive Data Types . After that, check out our guide: Java Non-primitive Data Types .

Java Casting

In Java, casting refers to converting one primitive type to another. There are two types of casting conversion in Java: widening and narrowing .

In Java, widening refers to converting a value to a larger type in the data type hierarchy; for instance: byte > short > char > int > long > float > double .

Narrowing , on the other hand, refers to converting a value to a lower type in the data type hierarchy: double > float > long > int > char > short > byte .

Widening conversion happens automatically. However, for narrowing, you need to explicitly define it in your statement using a cast operator () . This is a unary operator () that takes in the smaller primitive type, as shown in the code example below:

Assignment Conversion in Java

Assignment conversion occurs when the value of an expression is assigned to a given variable. For example:

Assignment conversion can be used with boxing, unboxing, and type casting conversions.

Final Thoughts on Type Conversion in Java

In this programming tutorial, developers learned how to convert between different types in Java. Now, it is important for you to note that assignment happens from right to left (i.e the expression you are converting should be on the right-hand side of the equal sign).

Also, remember that narrowing conversion needs to be clearly defined by you the programmer. However, widening conversion is automatically handled by the compiler.

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When compatible types are mixed in an assignment, the value of the right side is automatically converted to the type of the left side. Thus, in the preceding fragment, the value in i is converted into a float and then assigned to f . However, because of Java’s strict type checking, not all types are compatible, and thus, not all type conversions are implicitly allowed. For example, boolean and int are not compatible.

When one type of data is assigned to another ...

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Assignment Operators J8 Home « Assignment Operators

<< Relational & Logical Operators
Bitwise Logical Operators >>

Symbols used for mathematical and logical manipulation that are recognized by the compiler are commonly known as operators in Java. In the third of five lessons on operators we look at the assignment operators available in Java.

Assignment Operators Overview Top

The single equal sign = is used for assignment in Java and we have been using this throughout the lessons so far. This operator is fairly self explanatory and takes the form variable = expression; . A point to note here is that the type of variable must be compatible with the type of expression .

Shorthand Assignment Operators

The shorthand assignment operators allow us to write compact code that is implemented more efficiently.

Operator	Meaning	Result	Notes
+=	Addition	10
-=	Subtraction	0
/=	Division	3	When used with an type, any remainder will be truncated.
*=	Multiplication	25
%=	Modulus	1	Holds the remainder value of a division.
&=	AND		Will check both operands for values and assign or to the first operand dependant upon the outcome of the expression.
\|=	OR		Will check both operands for values and assign or to the first operand dependant upon the outcome of the expression.
^=	XOR		Will check both operands for different values and assign or to the first operand dependant upon the outcome of the expression.

Automatic Type Conversion, Assignment Rules Top

The following table shows which types can be assigned to which other types, of course we can assign to the same type so these boxes are greyed out.

When using the table use a row for the left assignment and a column for the right assignment. So in the highlighted permutations byte = int won't convert and int = byte will convert.


	NO	NO	NO	NO	NO	NO	NO
NO		NO	NO	NO	NO	NO	NO
NO	NO		NO	NO	NO	NO	NO
NO	NO	YES		NO	NO	NO	NO
NO	YES	YES	YES		NO	NO	NO
NO	YES	YES	YES	YES		NO	NO
NO	YES	YES	YES	YES	YES		NO
NO	YES	YES	YES	YES	YES	YES

Casting Incompatible Types Top

The above table isn't the end of the story though as Java allows us to cast incompatible types. A cast instructs the compiler to convert one type to another enforcing an explicit type conversion.

A cast takes the form target = (target-type) expression .

There are a couple of things to consider when casting incompatible types:

With narrowing conversions such as an int to a short there may be a loss of precision if the range of the int exceeds the range of a short as the high order bits will be removed.
When casting a floating-point type to an integer type the fractional component is lost through truncation.
The target-type can be the same type as the target or a narrowing conversion type.
The boolean type is not only incompatible but also inconvertible with other types.

Lets look at some code to see how casting works and the affect it has on values:

Running the Casting class produces the following output:

The first thing to note is we got a clean compile because of the casts, all the type conversions would fail otherwise. You might be suprised by some of the results shown in the screenshot above, for instance some of the values have become negative. Because we are truncating everything to a byte we are losing not only any fractional components and bits outside the range of a byte , but in some cases the signed bit as well. Casting can be very useful but just be aware of the implications to values when you enforce explicit type conversion.

Related Quiz

Fundamentals Quiz 8 - Assignment Operators Quiz

Lesson 9 Complete

In this lesson we looked at the assignment operators used in Java.

What's Next?

In the next lesson we look at the bitwise logical operators used in Java.

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Before you learn about Java Type Casting , make sure you know about Java Data Types .

Type Casting

The process of converting the value of one data type ( int , float , double , etc.) to another data type is known as typecasting.

In Java, there are 13 types of type conversion. However, in this tutorial, we will only focus on the major 2 types.

1. Widening Type Casting

2. Narrowing Type Casting

To learn about other types of type conversion, visit Java Type Conversion (official Java documentation) .

Widening Type Casting

In Widening Type Casting , Java automatically converts one data type to another data type.

Example: Converting int to double

In the above example, we are assigning the int type variable named num to a double type variable named data .

Here, the Java first converts the int type data into the double type. And then assign it to the double variable.

In the case of Widening Type Casting , the lower data type (having smaller size) is converted into the higher data type (having larger size). Hence there is no loss in data. This is why this type of conversion happens automatically.

Note : This is also known as Implicit Type Casting .

Narrowing Type Casting

In Narrowing Type Casting , we manually convert one data type into another using the parenthesis.

Example: Converting double into an int

In the above example, we are assigning the double type variable named num to an int type variable named data .

Notice the line,

Here, the int keyword inside the parenthesis indicates that that the num variable is converted into the int type.

In the case of Narrowing Type Casting , the higher data types (having larger size) are converted into lower data types (having smaller size). Hence there is the loss of data. This is why this type of conversion does not happen automatically.

Note : This is also known as Explicit Type Casting .

Let's see some of the examples of other type conversions in Java.

Example 1: Type conversion from int to String

In the above program, notice the line

Here, we have used the valueOf() method of the Java String class to convert the int type variable into a string.

Example 2: Type conversion from String to int

In the above example, notice the line

Here, we have used the parseInt() method of the Java Integer class to convert a string type variable into an int variable.

Note : If the string variable cannot be converted into the integer variable then an exception named NumberFormatException occurs.

Java Program to convert int type variables to char
Java Program to convert int type variables to long
Java Program to convert long type variables into int
Java Program to convert double type variables to int

Introduction
Example: Conversion from int to String
Example: Conversion from String to int

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1. Overview

Sometimes, when we compile our Java source, the compiler may print a warning message “unchecked conversion” or “ The expression of type List needs unchecked conversion .”

In this tutorial, we’re going to take a deeper look at the warning message. We’ll discuss what this warning means, what problem it can lead to, and how to solve the potential problem.

2. Enabling the Unchecked Warning Option

Before we look into the “ unchecked conversion ” warning, let’s make sure that the Java compiler option to print this warning has been enabled.

If we’re using the Eclipse JDT Compiler , this warning is enabled by default.

When we’re using the Oracle or OpenJDK javac compiler, we can enable this warning by adding the compiler option -Xlint:unchecked.

Usually, we write and build our Java program in an IDE. We can add this option in the IDE’s compiler settings.

For example, the screenshot below shows how this warning is enabled in JetBrains IntelliJ :

Apache Maven is a widely used tool for building Java applications. We can configure maven-compiler-plugin ‘s compilerArguments to enable this option:

Now that we’ve confirmed that our Java compiler has this warning option enabled, let’s take a closer look at this warning.

3. When Will the Compiler Warn Us: “unchecked conversion”?

In the previous section, we’ve learned how to enable the warning by setting the Java compiler option. Therefore, it’s not hard to imagine that “unchecked conversion” is a compile-time warning. Usually, we’ll see this warning when assigning a raw type to a parameterized type without type checking.

This assignment is allowed by the compiler because the compiler has to allow this assignment to preserve backward compatibility with older Java versions that do not support generics .

An example will explain it quickly. Let’s say we have a simple method to return a raw type List :

Next, let’s create a test method that calls the method and assigns the result to a variable with the type List<String> :

Now, if we compile our test above, we’ll see the warning from the Java compiler.

Let’s build and test our program using Maven:

As the output above shows, we’ve reproduced the compiler warning.

A typical example in the real world is when we use Java Persistence API ‘s Query.getResultList() method. The method returns a raw type List object.

However, when we try to assign the raw type list to a list with a parameterized type, we’ll see this warning at compile-time:

Moreover, we know that if the compiler warns us of something, it means there are potential risks. If we review the Maven output above, we’ll see that although we get the “ unchecked conversion ” warning, our test method works without any problem.

Naturally, we may want to ask why the compiler warns us with this message and what potential problem we might have?

Next, let’s figure it out.

4. Why Does the Java Compiler Warn Us?

Our test method works well in the previous section, even if we get the “ unchecked conversion ” warning. This is because the getRawList() method only adds String s into the returned list.

Now, let’s change the method a little bit:

In the new getRawListWithMixedTypes() method, we add a Date object to the returned list. It’s allowed since we’re returning a raw type list that can contain any types.

Next, let’s create a new test method to call the getRawListWithMixedTypes() method and test the return value:

If we run the test method above, we’ll see the “ unchecked conversion ” warning again, and the test will pass.

This means a ClassCastException has been thrown when we get the Date object by calling get(3) and attempt to cast its type to String.

In the real world, depending on the requirements, sometimes the exception is thrown too late.

For example, we assign List<String> strList = getRawListWithMixedTypes(). For each String object in strList, suppose that we use it in a pretty complex or expensive process such as external API calls or transactional database operations.

When we encounter the ClassCastException on an element in the strList , some elements have been processed. Thus, the ClassCastException comes too late and may lead to some extra restore or data cleanup processes.

So far, we’ve understood the potential risk behind the “unchecked conversion” warning. Next, let’s see what we can do to avoid the risk.

5. What Shall We Do With the Warning?

If we’re allowed to change the method that returns raw type collections, we should consider converting it into a generic method. In this way, type safety will be ensured.

However, it’s likely that when we encounter the “ unchecked conversion ” warning, we’re working with a method from an external library. Let’s see what we can do in this case.

5.1. Suppressing the Warning

We can use the annotation SuppressWarnings(“unchecked”) to suppress the warning.

However, we should use the @SuppressWarnings(“unchecked”) annotation only if we’re sure the typecast is safe because it merely suppresses the warning message without any type checking.

Let’s see an example:

As we’ve mentioned earlier, JPA’s Query.getResultList() method returns a raw typed List object. Based on our query, we’re sure the raw type list can be cast to List<Object[]> . Therefore, we can add the @SuppressWarnings above the assignment statement to suppress the “ unchecked conversion ” warning.

5.2. Checking Type Conversion Before Using the Raw Type Collection

The warning message “ unchecked conversion ” implies that we should check the conversion before the assignment.

To check the type conversion, we can go through the raw type collection and cast every element to our parameterized type. In this way, if there are some elements with the wrong types, we can get ClassCastException before we really use the element.

We can build a generic method to do the type conversion. Depending on the specific requirement, we can handle ClassCastException in different ways.

First, let’s say we’ll filter out the elements that have the wrong types:

Let’s test the castList() method above by a unit test method:

When we build and execute the test method, the “ unchecked conversion ” warning is gone, and the test passes.

Of course, if it’s required, we can change our castList() method to break out of the type conversion and throw ClassCastException immediately once a wrong type is detected:

As usual, let’s create a unit test method to test the castList2() method:

The test method above will pass if we give it a run. It means that once there’s an element with the wrong type in rawList , the castList2() method will stop the type conversion and throw ClassCastException.

6. Conclusion

In this article, we’ve learned what the “ unchecked conversion ” compiler warning is. Further, we’ve discussed the cause of this warning and how to avoid the potential risk.

As always, the code in this write-up is all available over on GitHub .

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Java Assignment Operators with Examples

Operators constitute the basic building block of any programming language. Java too provides many types of operators which can be used according to the need to perform various calculations and functions, be it logical, arithmetic, relational, etc. They are classified based on the functionality they provide.

Types of Operators:

Arithmetic Operators
Unary Operators
Assignment Operator
Relational Operators
Logical Operators
Ternary Operator
Bitwise Operators
Shift Operators

This article explains all that one needs to know regarding Assignment Operators.

Assignment Operators

These operators are used to assign values to a variable. The left side operand of the assignment operator is a variable, and the right side operand of the assignment operator is a value. The value on the right side must be of the same data type of the operand on the left side. Otherwise, the compiler will raise an error. This means that the assignment operators have right to left associativity, i.e., the value given on the right-hand side of the operator is assigned to the variable on the left. Therefore, the right-hand side value must be declared before using it or should be a constant. The general format of the assignment operator is,

Types of Assignment Operators in Java

The Assignment Operator is generally of two types. They are:

1. Simple Assignment Operator: The Simple Assignment Operator is used with the “=” sign where the left side consists of the operand and the right side consists of a value. The value of the right side must be of the same data type that has been defined on the left side.

2. Compound Assignment Operator: The Compound Operator is used where +,-,*, and / is used along with the = operator.

Let’s look at each of the assignment operators and how they operate:

1. (=) operator:

This is the most straightforward assignment operator, which is used to assign the value on the right to the variable on the left. This is the basic definition of an assignment operator and how it functions.

Syntax:

Example:

2. (+=) operator:

This operator is a compound of ‘+’ and ‘=’ operators. It operates by adding the current value of the variable on the left to the value on the right and then assigning the result to the operand on the left.

Note: The compound assignment operator in Java performs implicit type casting. Let’s consider a scenario where x is an int variable with a value of 5. int x = 5; If you want to add the double value 4.5 to the integer variable x and print its value, there are two methods to achieve this: Method 1: x = x + 4.5 Method 2: x += 4.5 As per the previous example, you might think both of them are equal. But in reality, Method 1 will throw a runtime error stating the “i ncompatible types: possible lossy conversion from double to int “, Method 2 will run without any error and prints 9 as output.

Reason for the Above Calculation

Method 1 will result in a runtime error stating “incompatible types: possible lossy conversion from double to int.” The reason is that the addition of an int and a double results in a double value. Assigning this double value back to the int variable x requires an explicit type casting because it may result in a loss of precision. Without the explicit cast, the compiler throws an error. Method 2 will run without any error and print the value 9 as output. The compound assignment operator += performs an implicit type conversion, also known as an automatic narrowing primitive conversion from double to int . It is equivalent to x = (int) (x + 4.5) , where the result of the addition is explicitly cast to an int . The fractional part of the double value is truncated, and the resulting int value is assigned back to x . It is advisable to use Method 2 ( x += 4.5 ) to avoid runtime errors and to obtain the desired output.

Same automatic narrowing primitive conversion is applicable for other compound assignment operators as well, including -= , *= , /= , and %= .

3. (-=) operator:

This operator is a compound of ‘-‘ and ‘=’ operators. It operates by subtracting the variable’s value on the right from the current value of the variable on the left and then assigning the result to the operand on the left.

4. (*=) operator:

This operator is a compound of ‘*’ and ‘=’ operators. It operates by multiplying the current value of the variable on the left to the value on the right and then assigning the result to the operand on the left.

5. (/=) operator:

This operator is a compound of ‘/’ and ‘=’ operators. It operates by dividing the current value of the variable on the left by the value on the right and then assigning the quotient to the operand on the left.

6. (%=) operator:

This operator is a compound of ‘%’ and ‘=’ operators. It operates by dividing the current value of the variable on the left by the value on the right and then assigning the remainder to the operand on the left.

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Exception Handling

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Java Conversion

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Java Array Class
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Java AtomicInteger Class
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Java AtomicLong Methods
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Java Authenticator
getPasswordAuthentication()
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getRequestingPrompt()
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getRequestingScheme()
getRequestingSite()
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getRequestorType()
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Java BigDecimal class
intValueExact()
movePointLeft()
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Big Integer Class
bitLength()
compareTo()
divideAndRemainder()
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modInverse()
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Java Boolean class
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Java Byte Class

byteValue()
compareUnsigned()
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shortValue()
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asSubclass()
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Java Collections class
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Java Compiler Class

Java Compiler
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CopyOnWriteArrayList

Java CopyOnWriteArrayList
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Java Math Methods

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LinkedBlockingDeque

Java LinkedBlockingDeque
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Java LinkedTransferQueue
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Difference between Array and ArrayList
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How to convert ArrayList to Array and Array to ArrayList in java
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Java Projects

Free Java Projects
Payment Bill(JSP)
Transport (JSP)
Connect Globe (JSP)
Online Banking (JSP)
Online Quiz (JSP)
Classified (JSP)
Mailcasting (JSP)
Online Library (JSP)
Pharmacy (JSP)
Mailer (Servlet)
Baby Care (Servlet)
Chat Server (Core)
Library (Core)
Exam System (Core)
Java Apps (Core)
Fee Report (Core)
Fee (Servlet)
eLibrary (Servlet)
Fire Detection
Attendance System
Fibonacci Series in Java
Prime Number Program in Java
Palindrome Program in Java
Factorial Program in Java
Armstrong Number in Java
How to Generate Random Number in Java
How to Print Pattern in Java
How to Compare Two Objects in Java
How to Create Object in Java
How to Print ASCII Value in Java
How to Reverse a Number in Java
Java Program to convert Number to Word
Automorphic Number Program in Java
Peterson Number in Java
Sunny Number in Java
Tech Number in Java
Fascinating Number in Java
Keith Number in Java
Neon Number in Java
Spy Number in Java
ATM program Java
Autobiographical Number in Java
Emirp Number in Java
Sphenic Number in Java
Buzz Number Java
Duck Number Java
Evil Number Java
ISBN Number Java
Krishnamurthy Number Java
Bouncy Number in Java
Mystery Number in Java
Smith Number in Java
Strontio Number in Java
Xylem and Phloem Number in Java
nth Prime Number Java
Java Program to Display Alternate Prime Numbers
Java Program to Find Square Root of a Number Without sqrt Method
Java Program to Swap Two Numbers Using Bitwise Operator
Java Program to Find GCD of Two Numbers
Java Program to Find Largest of Three Numbers
Java Program to Find Smallest of Three Numbers Using Ternary Operator
Java Program to Check if a Number is Positive or Negative
Java Program to Check if a Given Number is Perfect Square
Java Program to Display Even Numbers From 1 to 100
Java Program to Display Odd Numbers From 1 to 100
Java Program to Find Sum of Natural Numbers
Java Program to copy all elements of one array into another array
Java Program to find the frequency of each element in the array
Java Program to left rotate the elements of an array
Java Program to print the duplicate elements of an array
Java Program to print the elements of an array
Java Program to print the elements of an array in reverse order
Java Program to print the elements of an array present on even position
Java Program to print the elements of an array present on odd position
Java Program to print the largest element in an array
Java Program to print the smallest element in an array
Java Program to print the number of elements present in an array
Java Program to print the sum of all the items of the array
Java Program to right rotate the elements of an array
Java Program to sort the elements of an array in ascending order
Java Program to sort the elements of an array in descending order
Java Program to Find 3rd Largest Number in an array
Java Program to Find 2nd Largest Number in an array
Java Program to Find Largest Number in an array
Java to Program Find 2nd Smallest Number in an array
Java Program to Find Smallest Number in an array
Java Program to Remove Duplicate Element in an array
Java Program to Print Odd and Even Numbers from an array
How to Sort an Array in Java
Java Matrix Programs
Java Program to Add Two Matrices
Java Program to Multiply Two Matrices
Java Program to subtract the two matrices
Java Program to determine whether two matrices are equal
Java Program to display the lower triangular matrix
Java Program to display the upper triangular matrix
Java Program to find the frequency of odd & even numbers in the given matrix
Java Program to find the product of two matrices
Java Program to find the sum of each row and each column of a matrix
Java Program to find the transpose of a given matrix
Java Program to determine whether a given matrix is an identity matrix
Java Program to determine whether a given matrix is a sparse matrix
Java Program to Transpose matrix
Java Program to count the total number of characters in a string
Java Program to count the total number of characters in a string 2
Java Program to count the total number of punctuation characters exists in a String
Java Program to count the total number of vowels and consonants in a string
Java Program to determine whether two strings are the anagram
Java Program to divide a string in 'N' equal parts.
Java Program to find all subsets of a string
Java Program to find the longest repeating sequence in a string
Java Program to find all the permutations of a string
Java Program to remove all the white spaces from a string
Java Program to replace lower-case characters with upper-case and vice-versa
Java Program to replace the spaces of a string with a specific character
Java Program to determine whether a given string is palindrome
Java Program to determine whether one string is a rotation of another
Java Program to find maximum and minimum occurring character in a string
Java Program to find Reverse of the string
Java program to find the duplicate characters in a string
Java program to find the duplicate words in a string
Java Program to find the frequency of characters
Java Program to find the largest and smallest word in a string
Java Program to find the most repeated word in a text file
Java Program to find the number of the words in the given text file
Java Program to separate the Individual Characters from a String
Java Program to swap two string variables without using third or temp variable.
Java Program to print smallest and biggest possible palindrome word in a given string
Reverse String in Java Word by Word
Reserve String without reverse() function
Linear Search in Java
Binary Search in Java
Bubble Sort in Java
Selection Sort in Java
Insertion Sort in Java
How to convert String to int in Java
How to convert int to String in Java
How to convert String to long in Java
How to convert long to String in Java
How to convert String to float in Java
How to convert float to String in Java
How to convert String to double in Java
How to convert double to String in Java
How to convert String to Date in Java
How to convert Date to String in Java
How to convert String to char in Java
How to convert char to String in Java
How to convert String to Object in Java
How to convert Object to String in Java
How to convert int to long in Java
How to convert long to int in Java
How to convert int to double in Java
How to convert double to int in Java
How to convert char to int in Java
How to convert int to char in Java
How to convert String to boolean in Java
How to convert boolean to String in Java
How to convert Date to Timestamp in Java
How to convert Timestamp to Date in Java
How to convert Binary to Decimal in Java
How to convert Decimal to Binary in Java
How to convert Hex to Decimal in Java
How to convert Decimal to Hex in Java
How to convert Octal to Decimal in Java
How to convert Decimal to Octal in Java
Java program to print the following spiral pattern on the console
Java program to print the following pattern
Java program to print the following pattern 2
Java program to print the following pattern 3
Java program to print the following pattern 4
Java program to print the following pattern 5
Java program to print the following pattern on the console
Java program to print the following pattern on the console 2
Java program to print the following pattern on the console 3
Java program to print the following pattern on the console 4
Java program to print the following pattern on the console 5
Java program to print the following pattern on the console 6
Java program to print the following pattern on the console 7
Java program to print the following pattern on the console 8
Java program to print the following pattern on the console 9
Java program to print the following pattern on the console 10
Java program to print the following pattern on the console 11
Java program to print the following pattern on the console 12
Singly linked list Examples in Java
Java Program to create and display a singly linked list
Java program to create a singly linked list of n nodes and count the number of nodes
Java program to create a singly linked list of n nodes and display it in reverse order
Java program to delete a node from the beginning of the singly linked list
Java program to delete a node from the middle of the singly linked list
Java program to delete a node from the end of the singly linked list
Java program to determine whether a singly linked list is the palindrome
Java program to find the maximum and minimum value node from a linked list
Java Program to insert a new node at the middle of the singly linked list
Java program to insert a new node at the beginning of the singly linked list
Java program to insert a new node at the end of the singly linked list
Java program to remove duplicate elements from a singly linked list
Java Program to search an element in a singly linked list
Java program to create and display a Circular Linked List
Java program to create a Circular Linked List of N nodes and count the number of nodes
Java program to create a Circular Linked List of n nodes and display it in reverse order
Java program to delete a node from the beginning of the Circular Linked List
Java program to delete a node from the end of the Circular Linked List
Java program to delete a node from the middle of the Circular Linked List
Java program to find the maximum and minimum value node from a circular linked list
Java program to insert a new node at the beginning of the Circular Linked List
Java program to insert a new node at the end of the Circular Linked List
Java program to insert a new node at the middle of the Circular Linked List
Java program to remove duplicate elements from a Circular Linked List
Java program to search an element in a Circular Linked List
Java program to sort the elements of the Circular Linked List
Java program to convert a given binary tree to doubly linked list
Java program to create a doubly linked list from a ternary tree
Java program to create a doubly linked list of n nodes and count the number of nodes
Java program to create a doubly linked list of n nodes and display it in reverse order
Java program to create and display a doubly linked list
Java program to delete a new node from the beginning of the doubly linked list
Java program to delete a new node from the end of the doubly linked list
Java program to delete a new node from the middle of the doubly linked list
Java program to find the maximum and minimum value node from a doubly linked list
Java program to insert a new node at the beginning of the Doubly Linked list
Java program to insert a new node at the end of the Doubly Linked List
Java program to insert a new node at the middle of the Doubly Linked List
Java program to remove duplicate elements from a Doubly Linked List
Java program to rotate doubly linked list by N nodes
Java program to search an element in a doubly linked list
Java program to sort the elements of the doubly linked list
Java Program to calculate the Difference between the Sum of the Odd Level and the Even Level Nodes of a Binary Tree
Java program to construct a Binary Search Tree and perform deletion and In-order traversal
Java program to convert Binary Tree to Binary Search Tree
Java program to determine whether all leaves are at same level
Java program to determine whether two trees are identical
Java program to find maximum width of a binary tree
Java program to find the largest element in a Binary Tree
Java program to find the maximum depth or height of a tree
Java program to find the nodes which are at the maximum distance in a Binary Tree
Java program to find the smallest element in a tree
Java program to find the sum of all the nodes of a binary tree
Java program to find the total number of possible Binary Search Trees with N keys
Java program to implement Binary Tree using the Linked List
Java program to search a node in a Binary Tree
Java Main Method
System.out.println()
Java Memory Management
Java ClassLoader
Java Decompiler
Java vs. JavaScript
Java vs. Kotlin
Java vs. Python
Java Absolute Value
How to Create File
Delete a File in Java
Open a File in Java
Sort a List in Java
Convert byte Array to String
Java Basics
How to Compile & Run Java Program
How to Run Java Program in Eclipse
How to Verify Java Version
Ways to Create an Object in Java
How to Run a Java program in Windows 10
Runnable Interface in Java
Java Keystore
Get input from user in Java
Read file line by line in Java
Take String input in Java
How to Read Excel File in Java
Read XML File in Java
CompletableFuture in Java
Java ExecutorService
How to iterate Map in Java
How to Return an Array in Java
How to Sort HashMap by Value
How to Sort HashMap in Java
Load Factor in HashMap
Array vs ArrayList
HashMap vs TreeMap
HashSet vs HashMap class
Compare Two ArrayList in Java
Merge Two Arrays in Java
Print Array in Java
Read CSV File in Java
Remove Special Characters from String
ArrayIndexOutOfBoundsException
ConcurrentModificationException
NoSuchElementException
NumberFormatException
How to Sort ArrayList in Java
How to Download Java
How to Call a Method in Java
How to Create Singleton Class in Java
How to Find Array Length in Java
How to Read Character in Java
Can We Overload main() Method in Java
How to Convert Char Array to String in Java
How to Run Java Program in CMD Using Notepad
How to Sort String Array in Java
How to Compare Dates in Java
How to Take Multiple String Input in Java Using Scanner
How to Remove Last Character from String in Java
How TreeMap Works Internally in Java
Java Program to Break Integer into Digits
Java Program to Calculate Area and Circumference of Circle
What is Diamond Problem in Java
Java Program to Read Number from Standard Input
How to Download Minecraft Java Edition
Can We Override Static Method in Java
How to Avoid Deadlock in Java
How to Achieve Abstraction in Java
How Garbage Collection Works in Java
How to Take Array Input in Java
How to Create Array of Objects in Java
How to Create Package in Java
How to Print in Java
What is Framework in Java
Why Java is Secure
How to Iterate List in Java
How to Use Eclipse for Java
Which Package is Imported by Default in Java
Could Not Find or Load Main Class in Java
How to Compare Two Arrays in Java
How to Convert String to JSON Object in Java
Which is Better Java or Python
How to Update Java
How to Get Value from JSON Object in Java Example
How to Split a String in Java with Delimiter
Structure of Java Program
Why We Use Constructor in Java
Java Create Excel File
Java Interpreter
javac is not Recognized
Dynamic Array in Java
Shunting yard algorithm
Java Destructor
Custom ArrayList in Java
ArrayList vs HashMap
Java Constant
Java Tokens
How to Enable Java in Chrome
Java Semaphore
Array to List in Java
JIT in Java
How to Clear Screen in Java
Java Logger
Reverse a String Using Recursion in Java
Java Path Vs File
Float Vs Double Java
Stack vs Heap Java
Abstraction vs Encapsulation
Top 10 Java Books
Public vs Private
What is Java Used For
Bitwise Operator in Java
SOLID Principles Java
Type Casting in Java
Conditional Operator in Java
Ternary Operator Java
Java Architecture
REPL in Java
Types of Exception in Java
Why String is Immutable or Final in Java
Java vs Kotlin
Set in Java
Why non-static variable cannot be referenced from a static context in Java
Java Developer Roles and Responsibilities
Types of Classes in Java
Marker Interface in Java
Static Function in Java
Unary Operators in Java
What is Advance Java
ArrayList Implementation
Convert ArrayList to String Array
Hashmap vs ConcurrentHashMap
List vs ArrayList
Map vs HashMap
HashSet vs LinkedHashSet
How TreeSet Works Internally
LinkedHashMap vs HashMap
Java Program to Solve Quadratic Equation
Scope Resolution Operator in Java
Composition in Java
File Operations in Java
NoClassDefFoundError in Java
Thread Concept in Java
Upcasting and Downcasting in Java
Dynamic Polymorphism in Java
String Pool in Java
What is constructor chaining in Java
Add elements to Array in Java
Advantages and disadvantages of Java
Advantages of JavaBeans
AWS SDK for Java with Apache Maven
AWT and Swing in Java
AWT Program in Java
Boolean values in Java
ByteStream Classes in Java
CharacterStream Classes in Java
Class and Interface in Java
ClassCast Exception in Java
Cloneable in Java
Constructor overloading in Java
Control Flow in Java
Convert Java Object to Json using GSON
Convert XML to JSON in Java
How to avoid null pointer exception in Java
Java constructor returns a value, but what
Singleton Class in Java
Doubly Linked List Program in Java
Association in Java
Big data Java vs Python
Branching Statements in Java
Collections Sort in Java 8
List vs Set in Java
How many days required to learn Java
Implicitly Typecasting in Java
Legacy Class in Java
Character Array in Java
Equals() and Hashcode() in Java
Externalization in Java
Identifiers in Java
InvocationTargetException
Java Pass by Value
Mutable and Immutable in Java
Power Function in Java
Primitive Data Types in Java
String Array in Java
Virtual Function in Java
C vs C++ vs Java
Java String Max Size
Convert Java object to JSON
How to Calculate Date Difference in Java
How to Improve Coding Skills in Java
Java Email Validation
Java Testing Tools
Permutation and Combination in Java
Unique Number in Java Program
Java Code for DES
Pig Latin Program in Java
Array Rotation in Java
Equilibrium Index of an Array in Java
Different Ways to Print Exception Message in Java
Java Copy Constructor Example
Why We Use Static Class in Java
What is Core Java
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Real-Time Face Recognition In Java
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Cast Generic Type to Specific type Java
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Logger Class in Java
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Implementing the Java Queue Interface
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isnull() Method in Java
Java Array Generic
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Machine Learning Using Java
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Model Class in Java
Nested Exception Handling in Java
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Static Polymorphism in Java
Static Reference Variables in Java
Sum of Two Arrays in Java
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Burger Problem in Java Game
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Floyd Triangle in Java
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Interface Attributes in Java
Java Applications in the Real World
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Java Detect Date Format
Java Interface Without Methods
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Java Packet
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List of Checked Exceptions in Java
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Terminal Operations in Java 8
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FileInputStream finalize() Method in Java
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Java Package Annotation
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Multitasking in Java
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Java is a popular programming language that software developers use to construct a wide range of applications. It is a simple, robust, and platform-independent object-oriented language. There are various types of assignment operators in Java, each with its own function.

In this section, we will look at Java's many types of assignment operators, how they function, and how they are utilized.

To assign a value to a variable, use the basic assignment operator (=). It is the most fundamental assignment operator in Java. It assigns the value on the right side of the operator to the variable on the left side.

In the above example, the variable x is assigned the value 10.

To add a value to a variable and subsequently assign the new value to the same variable, use the addition assignment operator (+=). It takes the value on the right side of the operator, adds it to the variable's existing value on the left side, and then assigns the new value to the variable.

To subtract one numeric number from another, use the subtraction operator. All numeric data types, including integers and floating-point values, can be utilised with it. Here's an illustration:

In this example, we create two integer variables, a and b, subtract b from a, and then assign the result to the variable c.

To combine two numerical numbers, use the multiplication operator. All numeric data types, including integers and floating-point values, can be utilised with it. Here's an illustration:

In this example, we declare two integer variables, a and b, multiply their values using the multiplication operator, and then assign the outcome to the third variable, c.

To divide one numerical number by another, use the division operator. All numeric data types, including integers and floating-point values, can be utilised with it. Here's an illustration:

In this example, we declare two integer variables, a and b, divide them by one another using the division operator, and then assign the outcome to the variable c.

It's vital to remember that when two numbers are divided, the outcome will also be an integer, and any residual will be thrown away. For instance:

The modulus assignment operator (%=) computes the remainder of a variable divided by a value and then assigns the resulting value to the same variable. It takes the value on the right side of the operator, divides it by the current value of the variable on the left side, and then assigns the new value to the variable on the left side.

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Java: JLS section 5.2 Assignment conversion

This is a follow up with my previous question (which i didn't get any response). Here it goes.

If i'm following strictly the rules as stipulated in JLS section 5.2, the below should have failed.

It should have fail since there are 2 conversion going on here. First the implicit narrowing conversion from int to byte and the autoboxing byte to Byte. It's performing 2 conversion here.

So why didn't it fail?

Rules stipulated in JLS section 5.2 does not allow 2 conversion here.

type-conversion
implicit-conversion

This the quote from the same JLS Section :

A narrowing primitive conversion followed by a boxing conversion may be used if the type of the variable is: Byte and the value of the constant expression is representable in the type byte.

which clearly applies here.

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Here it goes. If i'm following strictly the rules as stipulated in JLS section 5.2, the below should have failed. Byte b = 2; It should have fail since there are 2 conversion going on here. First the implicit narrowing conversion from int to byte and the autoboxing byte to Byte. It's performing 2 conversion here.

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3. When Will the Compiler Warn Us: “unchecked conversion”?

4. Why Does the Java Compiler Warn Us?

5. What Shall We Do With the Warning?

5.1. Suppressing the Warning

5.2. Checking Type Conversion Before Using the Raw Type Collection

6. Conclusion

Java Assignment Operators with Examples

Assignment Operators

Types of Assignment Operators in Java

1. (=) operator:

2. (+=) operator:

Reason for the Above Calculation

3. (-=) operator:

4. (*=) operator:

5. (/=) operator:

6. (%=) operator:

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