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synch_block1.java

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//synchronized block to get lock of current Object

class Display {

public void wish(String name)

{

//consider here 1 lakh line of code which can be executed by mutliple threads simaltaneously

;;;;;;;;;;;;;;;;;

//if very few lines of code required synchronization then we should declare that code inside synchronizaion block

synchronized (this) {

for (int i = 0; i < 5; i++) {

System.out.print("good morning:");

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

}

System.out.println(name);

}

}

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

// consider here 1 lakh line of code which can be executed by mutliple threads simaltaneously

}

}

class MyThread extends Thread {

Display d;

String name;

MyThread(Display d, String s) {

this.d = d;

this.name = s;

}

public void run() {

d.wish(name);

}

}

public class synch_block1 {

public static void main(String[] args) {

Display d = new Display();

//on same display Object both threads are exeucting

MyThread t1 = new MyThread(d, "dhoni");

MyThread t2 = new MyThread(d, "Yuvraj");

t1.start();

t2.start();

}

}