// Code of Quiz 6.3
// Filename: Quiz6_3

class Foo{
   private int content;
   private String name;

   public Foo(String s){ content = 0; name = s; }
   public synchronized void addContent(int k) { content = content + k; }
   public synchronized void printContent() { System.out.print(content+" "); }
   public synchronized void printName() { System.out.print(name+" "); }
}

class MyThread extends Thread{
   private Foo f;
           
   public MyThread(Foo f){ this.f = f; }
   public void run(){ 
      try {sleep((long)(java.lang.Math.random()*6));} catch(InterruptedException e) { return; }; 
      f.printName();        //Print the name of f
      try {sleep((long)(java.lang.Math.random()*6));} catch(InterruptedException e) { return; }; 
      f.addContent(1);   //Update the content of f
      try {sleep((long)(java.lang.Math.random()*6));} catch(InterruptedException e) { return; }; 
      f.printContent();     //Print the content of f
    }
}

public class Quiz6_3{
     public static void main(String[] args) {
         Foo f = new Foo("Giorgio");
         MyThread T1 = new MyThread(f);
         MyThread T2 = new MyThread(f);
         T1.start(); 
         T2.start();
      }
}