Thread Synchronization Methods

class One{

synchronized void display(int num){

System.out.println(""+num);

try
{

Thread.sleep(1000);
}
catch(InterruptedException e){
System.out.println("Error : "+e);
}
System.out.println("Done");
}
}

class Two implements Runnable{

int number;
One objo;
Thread objo1;

public Two(One one_num,int num){

objo=one_num;

number=num;

objo1=new Thread(this);
objo1.start();
}

public void run(){

objo.display(number);
}
}


class SynchMethod{
public static void main(String a[]){


One objo=new One();

int digit=10;

Two objSynch1=new Two(objo,digit++);
Two objSynch2=new Two(objo,digit++);
Two objSynch3=new Two(objo,digit++);

//wait for THreads to end

try
{

objSynch1.objo1.join();
objSynch2.objo1.join();
objSynch3.objo1.join();
}
catch(InterruptedException ex){
System.out.println("Error : "+ex);
}

}
}