Write a program, four threads, where two threads each add 1 to J, while the other two threads reduce the J each time by 1, requiring the use of internal classes

/** *  @author  laishengfeng * @2014-8-27 *  @TODO   Write a program,   Four threads, of which two threads each add 1, *  to J each time a further two threads are reduced by 1 (requiring the use of an internal class thread) for each J  */public class test{  public  static void main (String[] args)  {  MyThread mt = new  MyThread ();   //mythread object   mt.new innerthread1 (). Start ();  mt.new  InnerThread1 (). Start ();   mt.new innerthread2 (). Start ();   mt.new innerthread2 (). Start ();  }}class mythread {  private int j = 100;   /* on the inner class of J-plus */  public class innerthread1 extends thread  {    public void run ()  {   while  (j < 120)     {    try {     thread.sleep (+);     }catch  (exception&NBSP;EX)  {    }    j++;    system.out.println (Thread.CurrentThread (). GetName () + "  " +j);   }   }  }  The inner class */   public class innerthread2 extends thread  {of  /* to J minus    public void run ()  {   while  (j > 80)     {    try {     thread.sleep (;  )   }catch  (Exception ex)  {    }    j--;     system.out.println (Thread.CurrentThread (). GetName () + "  " +j);    }    }  }}

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Write a program, four threads, where two threads each add 1 to J, while the other two threads reduce the J each time by 1, requiring the use of internal classes