kaiya% jdb -launch Go
Initializing jdb...
> 
VM Started: No frames on the current call stack

main[1] stop in Go.main
Deferring breakpoint Go.main.
It will be set after the class is loaded.
main[1] next
main[1] Set deferred breakpoint Go.main

Breakpoint hit: thread="main", Go.main(), line=5, bci=0
  5 		a=new ClassA();

main[1] classes
** classes list **
Go
boolean[]
一部省略

main[1] dump Go.a
 Go.a = null
main[1] next
main[1] 
Step completed: thread="main", Go.main(), line=6, bci=10
  6 	}

main[1] classes
** classes list **
ClassA
Go
boolean[]
一部省略

main[1] dump Go.a
 Go.a = instance of ClassA(id=194) {
    a: 0
}
main[1] next
main[1] 
The application exited