public class ConditionCommunication {    /**     * @param args     */    public static void main(String[] args) {                final Business business = new Business();        new Thread(                new Runnable() {                                        @Override                    public void run() {                                            for(int i=1;i<=50;i++){                            business.sub(i);                        }                                            }                }        ).start();                for(int i=1;i<=50;i++){            business.main(i);        }            }    static class Business {            Lock lock = new ReentrantLock();            Condition condition = lock.newCondition();          private boolean bShouldSub = true;          public  void sub(int i){              lock.lock();              try{                  while(!bShouldSub){                      try {                        condition.await();                    } catch (Exception e) {                        // TODO Auto-generated catch block                        e.printStackTrace();                    }                  }                    for(int j=1;j<=10;j++){                        System.out.println("sub thread sequence of " + j + ",loop of " + i);                    }                  bShouldSub = false;                  condition.signal();              }finally{                  lock.unlock();              }          }                    public  void main(int i){              lock.lock();              try{                 while(bShouldSub){                          try {                            condition.await();                        } catch (Exception e) {                            // TODO Auto-generated catch block                            e.printStackTrace();                        }                      }                    for(int j=1;j<=100;j++){                        System.out.println("main thread sequence of " + j + ",loop of " + i);                    }                    bShouldSub = true;                    condition.signal();          }finally{              lock.unlock();          }      }        }}