Java Custom Exception

Chapter: Exception Handling Last Updated: 25-03-2017 05:53:50 UTC

Program:

            /* ............... START ............... */
                
public class InvalidAgeException extends Exception 
{
    InvalidAgeException(String msg) 
    {
        super(msg);
    }
}

public class JavaCustomException {
	
	
	static void validate(int age) throws InvalidAgeException 
    {
        if (age < 18)
        {
            throw new InvalidAgeException("Age not valid.");
        }
        else
        {
            System.out.println("You are welcome to vote.");
        }
    }
 
    public static void main(String[] args) 
    {
        try
        {
            validate(16);
        } 
        catch (Exception e) 
        {
            System.out.println("Exception occured : " + e);
        }
        System.out.println("Rest of code...");
    }
}
                /* ............... END ............... */
        

Output

Exception occured : InvalidAgeException: Age not valid.
Rest of code...

Notes:

  • If you are creating your own Exception that is known as custom exception or user-defined exception. Java custom exceptions are used to customize the exception according to user need.

Tags

Custom Exception, Exception, Java

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