JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

Publish Your Article Here

How to Create Java Custom Exception

Sometimes it is required to develop meaningful exceptions based on application requirements. We can create our own exceptions by extending 'Exception' class. Below example shows how to create custom exception by extending Exception class.

Java Custom Exception Sample Code

Code:
package com.myjava.exceptions;

public class MyOwnException {
    public static void main(String[] a){
        try{
            MyOwnException.myTest(null);
        } catch(MyAppException mae){
            System.out.println("Inside catch block: "+mae.getMessage());
        }
    }
    
    static void myTest(String str) throws MyAppException{
        if(str == null){
            throw new MyAppException("String val is null");
        }
    }
}

class MyAppException extends Exception {

	private String message = null;

	public MyAppException() {
		super();
	}

	public MyAppException(String message) {
		super(message);
		this.message = message;
	}

	public MyAppException(Throwable cause) {
		super(cause);
	}

	@Override
	public String toString() {
		return message;
	}

	@Override
	public String getMessage() {
		return message;
	}
}

Example Output

Inside catch block: String val is null

blog comments powered by Disqus

Other Exception Handling Examples

Knowledge Centre
Purpose of garbage collection
The garbage collection process is to identify the objects which are no longer referenced or needed by a program so that their resources can be reclaimed and reused. These identified objects will be discarded.

About Author

Most Visited Pages

Other Interesting Sites

Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
Privacy Policy | Copyright © 2016 by Nataraja Gootooru. All Rights Reserved.