Exception Subclass In Java Example
Chapter:
Exception Handling
Last Updated:
09-06-2017 12:48:31 UTC
Program:
/* ............... START ............... */
public class JavaExceptionSubClass {
static void compute(int a) throws MyException {
System.out.println("Called compute(" + a + ")");
if (a > 10)
throw new MyException(a);
System.out.println("Normal exit");
}
public static void main(String args[]) {
try {
compute(1);
compute(20);
} catch (MyException e) {
System.out.println("Caught " + e);
}
}
}
// This program creates a custom exception type.
class MyException extends Exception {
private int detail;
MyException(int a) {
detail = a;
}
public String toString() {
return "MyException[" + detail + "]";
}
}
/* ............... END ............... */
Output
Called compute(1)
Normal exit
Called compute(20)
Caught MyException[20]
Notes:
-
In Exception Subclass we can create own exception types to handle situations specific to your applications.
- The Exception class does not define any methods of its own. It inherits methods provided by Throwable.
- All exceptions have the methods defined by Throwable available to them.
- You can override the toString() function, to display customized message.
Tags
Exception Subclass, Java