create exceptions java code example

Example 1: java define custom exception

public class CustomException extends Exception { 
    public CustomException(String errorMessage) {
        super(errorMessage);
    }
}

Example 2: exceptions in java

Unchecked:
-IndexOutOfBounds exception(while working with arrays/strings)
-NullPointerException(if I forget to instantiate the objects)
-ArithmaticException

Checked:
-IOException
-SQLException
-FileNotFountException