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Deadlock in Threads






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Creating a deadlock situation -:


We will create a deadlock situation in the upcoming code by having two threads -

class A 
{

synchronized public void m(A a,B b)
{

System.out.print(Thread.currentThread().getName());
System.out.println(" thread is in A'a m() method, trying to call B's m() method");
b.m(a,b);	//Line1
}
}


class B 
{

synchronized public void m( A a,B b)
{

System.out.print(Thread.currentThread().getName());
System.out.println(" is in B's m() method, trying to call A's m() method");
a.m(a,b);	//Line2
}
}


class C implements Runnable
{
A a= new A(); //Line3
B b= new B(); //Line4

Thread t;

C()
{
t= new Thread(this, "Thread2"); //Line5
t.start();	//Line6
a.m(a,b);   //Line7
}

public void run()
{
b.m(a,b); //Line8
}


public static void main(String []ar)
{
 new C(); //Line9
}

}



Output is - :


main thread is in A'a m() method, trying to call B's m() method
newThread is in B's m() method, trying to call A's m() method


Program Analysis





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