public class TT implements Runnable{
    int b = 100;

    public synchronized void run(){
         try {
            modify_1();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
    
    public synchronized void modify_1() throws InterruptedException{
        b=1000;
        Thread.sleep(5000);
        System.out.println(b);
    }

    
    public synchronized void  modify_2() throws InterruptedException{
        Thread.sleep(2500);
        b=2000;
        System.out.println(b);
    }
    
    public static void main(String[] args) throws InterruptedException {
        TT tt = new TT();
        Thread th = new Thread(tt);
        th.start();
        tt.modify_2();
        System.out.println(tt.b);
    }
}