[kaiya@eds08 tmp]$ ls
Gcd.java
[kaiya@eds08 tmp]$ javac -g Gcd.java
[kaiya@eds08 tmp]$ jdb -launch Gcd 12 15
Initializing jdb...
> 
VM Started: No frames on the current call stack

main[1] stop in Gcd.<init>
Deferring breakpoint Gcd.<init>.
It will be set after the class is loaded.
main[1] stop in Gcd.result
Deferring breakpoint Gcd.result.
It will be set after the class is loaded.
main[1] cont
main[1] Set deferred breakpoint request Gcd:16
Set deferred breakpoint request Gcd:6

Breakpoint hit: thread="main", Gcd.<init>(), line=6, bci=0
  6 	Gcd(int a, int b){

main[1] where
  [1] Gcd.<init> (Gcd.java:6)
  [2] Gcd.main (Gcd.java:35)
main[1] cont

Breakpoint hit: main[1] thread="main", Gcd.<init>(), line=6, bci=0
  6 	Gcd(int a, int b){

main[1] where
  [1] Gcd.<init> (Gcd.java:6)
  [2] Gcd.<init> (Gcd.java:11)
  [3] Gcd.main (Gcd.java:35)
main[1] cont

Breakpoint hit: main[1] thread="main", Gcd.<init>(), line=6, bci=0
  6 	Gcd(int a, int b){

main[1] where
  [1] Gcd.<init> (Gcd.java:6)
  [2] Gcd.<init> (Gcd.java:11)
  [3] Gcd.<init> (Gcd.java:11)
  [4] Gcd.main (Gcd.java:35)
main[1] cont

Breakpoint hit: main[1] thread="main", Gcd.<init>(), line=6, bci=0
  6 	Gcd(int a, int b){

main[1] where
  [1] Gcd.<init> (Gcd.java:6)
  [2] Gcd.<init> (Gcd.java:11)
  [3] Gcd.<init> (Gcd.java:11)
  [4] Gcd.<init> (Gcd.java:11)
  [5] Gcd.main (Gcd.java:35)
main[1] cont

Breakpoint hit: main[1] thread="main", Gcd.result(), line=16, bci=0
  16 	int result(){ return r; }

main[1] where
  [1] Gcd.result (Gcd.java:16)
  [2] Gcd.<init> (Gcd.java:12)
  [3] Gcd.<init> (Gcd.java:11)
  [4] Gcd.<init> (Gcd.java:11)
  [5] Gcd.main (Gcd.java:35)
main[1] cont

Breakpoint hit: main[1] thread="main", Gcd.result(), line=16, bci=0
  16 	int result(){ return r; }

main[1] where
  [1] Gcd.result (Gcd.java:16)
  [2] Gcd.<init> (Gcd.java:12)
  [3] Gcd.<init> (Gcd.java:11)
  [4] Gcd.main (Gcd.java:35)
main[1] cont

Breakpoint hit: main[1] thread="main", Gcd.result(), line=16, bci=0
  16 	int result(){ return r; }

main[1] where
  [1] Gcd.result (Gcd.java:16)
  [2] Gcd.<init> (Gcd.java:12)
  [3] Gcd.main (Gcd.java:35)
main[1] cont

Breakpoint hit: main[1] thread="main", Gcd.result(), line=16, bci=0
  16 	int result(){ return r; }

main[1] where
  [1] Gcd.result (Gcd.java:16)
  [2] Gcd.main (Gcd.java:36)
main[1] cont
12,15=3
Internal exception:  com.sun.jdi.VMDisconnectedException
	at com.sun.tools.jdi.EventQueueImpl.removeUnfiltered(EventQueueImpl.java:185)
	at com.sun.tools.jdi.EventQueueImpl.remove(EventQueueImpl.java:92)
	at com.sun.tools.jdi.EventQueueImpl.remove(EventQueueImpl.java:78)
	at com.sun.tools.example.debug.tty.EventHandler.handleDisconnectedException(EventHandler.java:148)
	at com.sun.tools.example.debug.tty.TTY.<init>(TTY.java:613)
	at com.sun.tools.example.debug.tty.TTY.main(TTY.java:876)

The application exited
[kaiya@eds08 tmp]$