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(1)Ò»ÖÖÊÇÉùÃ÷ Thread µÄ×ÓÀà£¬ÖØÔØ Thread ÀàµÄ·½·¨ run£¨Extend java.lang.Thread and override the run method£©
public class MyThread  extends Thread
{
      public void run()
     {//ÒòΪȱʡµÄrun()·½·¨Ê²Ã´¶¼²»×ö£¬Äã±ØÐëÖØÔØrun()ÒÔÍê³ÉÓÐÓõŤ×÷¡£
           for (int count = 1, row = 1; row < 20; row++, count++)
           {
                 for (int i = 0; i < count; i++)
                       System.out.print('*');
                 System.out.print('\n');
           }
     }
}
public static void main(String[] args)
{
      MyThread mt = new MyThread();//A·½·¨Ö´ÐÐ
      mt.start();//A
      Thread myThread = new Thread(new MyThread());//B·½·¨Ö´ÐÐ
      myThread.start();//B
      for (int i = 0; i < 500; i++)
     {
           System.out.println(i);
      }
 }
(2)ÁíÒ»ÖÖ;¾¶ÊÇÉùÃ÷Ò»¸öÀ࣬¸ÃÀàʵÏÖ Runnable ½Ó¿Ú¡£È»ºóÔÙʵÏÖ·½·¨ run¡£ 
£¨Implement java.lang.Runnable and implement the run method£©
public class MyThread implements Runnable
{
      public void run()
     {
          for (int count = 1, ro


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private static int MAX = 100;
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4.19 java programming

/////////////////////DogTestDrive/////////////////////
class DogTestDrive {
 public static void main(String[] args) {
  Dog one = new Dog();
     one.size = 70;
     Dog two = new Dog();
     two.size = 8;
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