java中锁的应用(ReentrantLock)

package com.xielu.test;

public class explicit {
    private static Lock lock = new ReentrantLock();
    private static Condition odd = lock.newCondition();
    private static COndition even = lock.newCondition();

    private static int cnt = 1;
    private static final int MAX = 100;

    pulic static void main(String args[]){
        Thread th1 = new Thread(){
            @Override
            public void run(){
                try{
                    lock.lock();
                    while(cnt <= MAX){
                        if(cnt%2 != 0){
                            System.out.println(cnt);
                            cnt++;
                            even.signalAll();
                        }else{
                            try{
                                odd.await();
                            }catch(Exception e){
                                e.printStackTrace();
                            }
                        }
                    }
                } finally {
                    lock.unlock();
                }
            }
        };
    
        Thread th2 = new Thread(){
            @Override
            public void run(){
                try{
                    lock.lock();
                    while(cnt <= MAX){
                        if(cnt%2 == 0){
                            System.out.println(cnt);
                            cnt++;
                            odd.signalAll();
                        }else{
                            try{
                                even.await();
                            }catch(Exception e){
                                e.printStackTrace();
                            }
                        }
                    }
                } finally {
                    lock.unlock();
                }
            }
        }; 
        th1.start();
        th2.start();   
    }
}