同時練習1

package threadtest;


/**
 *
 * @author Administrator
 */


public class ThreadTest {


    /**
     * @param args the command line arguments
     */
    public static class exercise implements Runnable
    {
//        
        private int count ;
        public exercise(){}  
        public exercise(int count)
        {
            this.count = count;
            System.out.println("exercise"+count+" had been constructed");
        }

        public void run()
        {
            for(int i = 0;i < 3;i++)
            {
                System.out.println("now in thread"+ i+" times");
                Thread.yield();      
            }
             System.out.println("end " + count);  
        
    }
}
    public static void main(String[] args) {
        // TODO code application logic here
       for(int i=0; i<5; i++)
       {  
            new Thread(new exercise(i)).start();  
        } 
}
}