Divide by Zero Example in Java

Introduction

Divide by Zero is a classic Java console program that demonstrates the concept with complete source code and sample output. Exceptions represent runtime errors; Java uses try-catch-finally to handle them safely.

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.

Syntax

try{
	//Statements
}catch(Expression_type Variable_name){
	//Statements
}

Divide by Zero Example Program

public class DivideByZeroException {
    public static void main(String[] args) {
        try{
            int number = 100/0;
        }catch(Exception e){
            System.out.println("Caught Exception while trying to divide 100 by zero : "+e.toString());
        }
    }
}

Sample Output

Caught Exception while trying to divide 100 by zero : java.lang.ArithmeticException: / by zero

When to use

Use this divide by zero 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. int number = 100/0; updates a variable used in the calculation or output.

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

4. Compare your console output with the sample output for Divide by Zero to confirm the program behaves correctly.

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.