JAVA学习之多线程--共享变量

 1 package sharevar;
 2 public class Machine extends Thread{
 3   private int a=0;  //实例变量 
 4   public void run(){
 5     for(a=0;a<50;a++){  //使用Machine对象的实例变量a
 6       System.out.println(currentThread().getName()+":"+a);
 7       try{
 8         sleep(100);
 9       }catch(InterruptedException e){ throw new RuntimeException(e);}
10     }
11   }
12   public static void main(String args[]){
13     Machine machine=new Machine();
14     machine.start();
15     machine.run();
16   }
17 }