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ExceptionHandling.java

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/*

Object -> Throwable:

* Error: ThreadDeath / IOError / OutOfMemory

Errors can not be handled

* Exceptions: RuntimeException (Unchecked Exceptions) - SQLException (Checked Exception)

*/

import com.sun.security.jgss.GSSUtil;

// Custom exception

class RaedException extends Exception {

public RaedException(String string) {

super(string);

}

}

// This class can throw an ClassNotFoundException

class A {

void show() {

try {

Class.forName("myClass");

} catch (ClassNotFoundException e) {

throw new RuntimeException(e);

}

}

}

public class ExceptionHandling {

public static void main(String[] a) {

A obj = new A();

obj.show();

/* Cascaded Exceptions */

// Arithmetic Exception

int i = 1;

int j = 0;

// Index out of bounds exception

int[] array = new int[5];

try {

j = 10/i;

System.out.println(array[1]);

System.out.println(array[4]);

}

catch(ArithmeticException e) {

System.out.println("Arithmetic exception");

}

catch(ArrayIndexOutOfBoundsException e) {

System.out.println("Out of bound");

}

catch(Exception e) {

System.out.println(e);

}

/* Throwable */

// Throw ArithmeticException

int x = 20;

int y = 1;

try {

y = 18/2;

if(y == 0)

throw new ArithmeticException(y + " was divided by a number > " + y);

if(y == 1)

throw new RaedException(y + " was divided by itself");

}

catch (ArithmeticException e) {

j = 18/1;

System.out.println("J: " + j + "\n" + e);

}

catch (RaedException e) {

System.out.println(e);

}

}

}