ReentrantLock() Basic usage example of reentrant lock

package com.bjsxt.height.lock020;

import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class UseCondition {

	private Lock lock = new ReentrantLock();//Reentrant lock.
	private Condition condition = lock.newCondition();//Same as wait() and notify methods.
	public void method1(){
		try {
			lock.lock();
			System.out.println("Current thread:" + Thread.currentThread().getName() + "Entering the waiting state..");
			Thread.sleep(3000);
			System.out.println("Current thread:" + Thread.currentThread().getName() + "Release lock..");
			condition.await();	// Object wait
			System.out.println("Current thread:" + Thread.currentThread().getName() + "Continue to execute...");
		} catch (Exception e) {
			e.printStackTrace ();
		} finally {
			System.out.println("release lock method1");
			lock.unlock();
		}
	}
	
	public void method2(){
		try {
			lock.lock();
			System.out.println("Current thread:" + Thread.currentThread().getName() + "Enter..");
			Thread.sleep(3000);
			System.out.println("Current thread:" + Thread.currentThread().getName() + "Send wakeup..");
			condition.signal();		//Object notify
		} catch (Exception e) {
			e.printStackTrace ();
		} finally {
			System.out.println("release lock method2");
			lock.unlock();
		}
	}
	
	public static void main(String[] args) {
		
		final UseCondition uc = new UseCondition();
		Thread t1 = new Thread(new Runnable() {
			@Override
			public void run() {
				uc.method1();
			}
		}, "t1");
		Thread t2 = new Thread(new Runnable() {
			@Override
			public void run() {
				uc.method2();
			}
		}, "t2");
		t1.start();

		t2.start();
	}
	
	
	
}