Exception again???help

Question

Hi guyz ,
I have something till now also not clear.
What is the benefit of exception ,refer to this 2 codes.
By looking at the code ,second code is much more shorter and easy to understand but doing the same thing as the first code where using exception.So ,what are the benefits.
Refer to the first code ,is defining like this can code reuse of the exception class(DivisionByZeroException) or exception grouping for the "code reuse and data abstraction purpose"?
First Code
==========
class DivisionByZeroException extends Exception {                      // (1)
public DivisionByZeroException(String msg) { super(msg); }
public class DivisionByZero6 {
public void division() throws DivisionByZeroException {            // (2)
int num1 = 10;
int num2 = 0;
if (num2 == 0) throw new DivisionByZeroException("/ by 0"); // (3)
System.out.println(num1 + " / " + num2 + " = " + (num1 / num2));
System.out.println("Returning from division.");
public static void main(String args[]) {
try {                                                         // (4)
new DivisionByZero6().division();
} catch (DivisionByZeroException e) {                         // (5)
System.out.println("In main, dealt with " + e);
} finally {                                                   // (6)
System.out.println("Finally done in main.");
System.out.println("Returning from main."); // (7)
Second Code
===========
public class DivisionByZero6 {
public void division(){            // (2)
int num1 = 10;
int num2 = 0;
if ( num2 != 0)
System.out.println(num1 + " / " + num2 + " = " + (num1 / num2));
System.out.println("Returning from division.");
else
{System.out.println("Deal with division by / by 0");} // (3)
public static void main(String args[])
new DivisionByZero6().division();
System.out.println("Returning from main."); // (7)

Answer 1

Hi ,
I understand the purpose of exception is for the robustness of data valitidy especially critical application .What i do not understand is why handling run time error must use java rules which is exception and run time error able to handle others simpler ways like some comparison syntax ..
Hope you understand my question....