CareerCup

One code example

import java.util.*;

public class test2 implements Runnable{
	String s1 ;
	String s2 ;
	
	public test2(String s1, String s2){
		this.s1 = s1;
		this.s2 = s2;
	}
	
	public void printOne() throws Exception{
		synchronized(s1){
			Thread.sleep(10000);
			synchronized(s2){
				System.out.println (s1 + s2);
			}
		}
	}
	
	public void printTwo() throws Exception{
		synchronized(s2){
			Thread.sleep(10000);
			synchronized(s1){
				System.out.println (s1 + s2);
			}
		}
	}
	
	public void run() {
		try{
			printOne();
		}catch(Exception e){
			
		}
	}
	
	public static void main(String[] args) throws Exception{
		String s1 = "dead";
		String s2 = "lock";
		test2 t = new test2(s1, s2);
		new Thread(t).start();
		t.printTwo();
	}
}

package com.interview.flipkart;



public class DeadLockExample extends Runnable{
static int a = 0;
static int b = 0;

boolean aOrb = false;

public static synchronized void setA(int ia){
this.a = a;
System.sleep(1000000L);
setB(ia/2);
}

public static synchronized void setB(int ib){
this.b= ib;
System.sleep(1000000L);
setA(2*ib);
}

public void run(){
if(aOrB){
setA(10);
}else{
setB(5);
}
}

public statis void main(String[] args){
DeadLockExample de1 = new DeadLockExample();
DeadLockExample de2 = new DeadLockExample();
del.aOrb = true;
de2.aOrb = false;
Thread th1 = new Thread(de1);
Thread th2 = new Thread(de2);
th1.start();
th1.start();
}
}

package com.interview.flipkart;



public class DeadLockExample extends Runnable{
	static int a = 0;
	static int b = 0;
	
	boolean aOrb = false;
	
	public static synchronized void setA(int ia){
		this.a = a;	
		System.sleep(1000000L);
		setB(ia/2);
	}
	
	public static synchronized void setB(int ib){
		this.b= ib;
		System.sleep(1000000L);
		setA(2*ib);	
	}
	
	public void run(){
		if(aOrB){
			setA(10);
		}else{
			setB(5);
		}	
	}
		
	public statis void main(String[] args){
		DeadLockExample de1 = new DeadLockExample();
		DeadLockExample de2 = new DeadLockExample();
		del.aOrb = true;
		de2.aOrb = false;
		Thread th1 = new Thread(de1);
		Thread th2 = new Thread(de2);
		th1.start();
		th1.start();	
	}
}