Exception:Meaning

[tiger100plus]

dear helpers,
1)What means exception.toString() and why must use throws Runtime Exception rather than the catch statement based on this program...?

public class Test {
public static void method3()throws RuntimeException{
throw new RuntimeException("RuntimeException occured in method3");
}

public static void method2()throws RuntimeException {
try{
method3();
}catch(RuntimeException exception){
System.out.printf("The following exception occured in method2\n%s\n",exception.toString());
throw exception;
}
}
public static void method1()throws RuntimeException{
try{
method2();
}catch(RuntimeException exception){
System.out.printf("The following exception occured in method1\n%s\n",exception.toString());
throw exception;
}
}
public static void main(String[] args){
try{
method1();
}
catch(RuntimeException exception){
System.out.printf("The following exception occured in main\n%s\n",exception.toString());
}
}

}

[Nicholas Jordan]

It is actually your choice to use Rutime exception of Exception, one has compiler make sure you deal with them, other lets it go.

toString() is to get someting that will print normally.

[Deepa]

Hi,
exception.toString() is similar to exception.
You throws exception instead of Runtime Exception.It depends only upon you.