class A
{
synchronized void foo(B b)
{
String name = Thread.currentThread().getName();
System.out.println(name + " entered A.foo");
try{Thread.sleep(1000);}
catch(Exception e)
{ System.out.println("A Interrupted"); }
System.out.println(name + " trying to call B.last()");
b.last();
}
synchronized void last()
{
System.out.println("Inside a.last");
}
} //close class A
class B
{
synchronized void bar(A a)
{
String name = Thread.currentThread().getName();
System.out.println(name + " entered B.bar");
try{Thread.sleep(1000);}
catch(Exception e)
{ System.out.println("B Interrupted"); }
System.out.println(name + " trying to call A.last()");
a.last();
}
synchronized void last()
{
System.out.println("Inside A.last");
}
} //close class B
class Deadlock implements Runnable{
A a = new A();
B b = new B();
Deadlock(){
Thread.currentThread().setName("MainThread");
Thread t = new Thread(this, "RacingThread");
t.start();
a.foo(b); //lock on a in this thread
System.out.println("Back in main thread");
}
public void run(){
b.bar(a);
System.out.println("Back in other thread");
}
public static void main(String args[]){
new Deadlock();
}
}