Program to explain Deadlock in Multithreading in Java Thread

// Program to explain Deadlock in Multithreading.
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");
}
}
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");
}
}
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);  // get lock on a in this thread.
 System.out.println("Back in main thread");
}
public void run() 
{
 b.bar(a); // get lock on b in other thread.
 System.out.println("Back in other thread");
}
public static void main(String args[ ]) 
{
 new DeadLock();
}
}

Output:

RacingThread entered B.bar
MainThread entered A.foo
RacingThread trying to call A.last()
MainThread trying to call B.last()