Exception doubt

[Nik Arora]

Hi All,
The output for the below code is BAFF.Can anybody explain me how?

class ExceptionA extends Exception {}
class ExceptionB extends ExceptionA {}

public class ObjectTest {

public static void main(String[] args) {
try {
throw new ExceptionB();
} catch (ExceptionB b) {
System.out.print("B");
try {
throw new ExceptionB();
} catch (ExceptionA e) {
System.out.print("A");
} finally {
System.out.print("F");
}
} catch (ExceptionA a) {
System.out.print("A");
} finally {
System.out.print("F");
}
}
}
Source:TeamTesting

Thanks All

[Chandra Bhatt]

First of all no problem with code, compiles and runs fine.

class ExceptionA extends Exception {} 
class ExceptionB extends ExceptionA {} 
 
public class ObjectTest { 
 
    public static void main(String[] args) { 
        try { 
            throw new ExceptionB(); //caught by Line #1 
        } catch (ExceptionB b) {  //Line #1
            System.out.print("B"); //B is printed
            try { 
                throw new ExceptionB(); //caught by Line #2  
            } catch (ExceptionA e) { //Line #2
                System.out.print("A"); //A is printed
            } finally {  //finally is executed
                System.out.print("F"); // prints F
            } 
        } catch (ExceptionA a) { 
            System.out.print("A"); 
        } finally {  //Outer finally is executed 
            System.out.print("F");  //prints F
        } 
    } 
}
 

Where was your doubt exactly?

Thanks,

[Keith Lynn]

1:class ExceptionA extends Exception {}
2:class ExceptionB extends ExceptionA {}
3:
4 :p ublic class ObjectTest {
5:
6:   public static void main(String[] args) {
7:      try {
8:         throw new ExceptionB();
9:      } catch (ExceptionB b) {
10:         System.out.print("B");
11:
12:         try {
13:            throw new ExceptionB();
14:         } catch (ExceptionA e) {
15:            System.out.print("A");
16:         } finally {
17:            System.out.print("F");
18:         }
19:      } catch (ExceptionA a) {
20:         System.out.print("A");
21:      } finally {
22:         System.out.print("F");
23:      }
24:   }
25:
26:}

An ExceptionB object is thrown in line 8 and is caught by the catch block in line 9 causing B to be printed.

An ExceptionB object is thrown in line 13, and since ExceptionB is a subclass of ExceptionA, it is caught by the catch block in line 14, causing an A to be printed.

Since a finally block is always executed unless the JVM shuts down, an F is printed.

Then the finally block associated with the first try is executed causing another F to be printed.
[ May 08, 2007: Message edited by: Keith Lynn ]

[Nik Arora]

THANKS K

[Nik Arora]

Thanks keith