Custom exception in java

Custom exception:

You can define your own exception also. These exceptions are known as custom exceptions.
Note:
1. For writing custom checked exception, extend Exception class.
2. For writing custom unchecked exception, extend RuntimeException class.

Example:

CustomExceptionExample.java

/**
 * This program is used to create custom exception.
 * @author w3spoint
 */
class MyException extends Exception {
    public MyException(String message) {
        super(message);
    }
}
 
class Test{
	public void display() throws MyException {
	  throw new MyException("This is a custom exception.");
	}
}
 
public class CustomExceptionExample {
	public static void main(String args[]){
		//creating Test object.
		Test obj = new Test();
 
		//method call.
		try{
			obj.display();
		}catch(Exception e){
			System.out.println(e);
		}
	}
}

Output:

com.w3spoint.business.MyException: This is a custom exception.

Download this example.

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