Assignment Operator Example in Java

Introduction

Assignment Operator is a classic Java console program that demonstrates the concept with complete source code and sample output. Operators combine values, compare results and update variables — core skills for every Java program.

This tutorial walks through the program line by line, explains how the logic works, and highlights best practices you can apply in your own code.

Definition

Operators in Java are similar to those in C++. However, there is no delete operator due to garbage collection mechanisms in Java, and there are no operations on pointers since Java does not support them. Assignment operator assigns a value to a particular variable.

Syntax

Variable_name = Variable_name;

Assignment Operator Example Program

import java.util.Scanner;
class AssignmentOperator{
	public static void main(String[] args){
		Scanner in=new Scanner(System.in);
		System.out.print("Enter num1: ");
		int num1=in.nextInt();
		System.out.println("The value "+num1+" is assigned to the variable num1");
		System.out.print("Enter num2: ");
		int num2=in.nextInt();
		System.out.println("The value "+num2+" is assigned to the variable num2");
	}
}

Sample Output

Output is
Enter num1: 34
The value 34 is assigned to the variable num1
Enter num2: 23
The value 23 is assigned to the variable num2

When to use

Use this assignment operator example when learning or revising core Java syntax.

How it works

1. Execution begins in the main method — the JVM calls this method when you run the class.

2. import java.util.Scanner; imports a class used later in the program.

3. A Scanner reads typed input from the keyboard (System.in).

4. A println / print call writes text to the console — part of the sample output below.

5. int num1=in.nextInt(); updates a variable used in the calculation or output.

6. A println / print call writes text to the console — part of the sample output below.

7. A println / print call writes text to the console — part of the sample output below.

8. A println / print call writes text to the console — part of the sample output below.

Best Practices

• Use meaningful variable and class names that describe their purpose.
• Compile and run the program locally — modify values to see how output changes.
• Read compiler errors carefully; they usually point to the exact line to fix.

Common Mistakes

• Copying code without understanding each line — practice by changing one statement at a time.
• Mismatching the public class name and the .java filename.
• Forgetting semicolons at the end of statements.