JDK并发包---(1)重入锁ReentrantLock：基本使用

import java.util.concurrent.locks.ReentrantLock;public class ReenterLock implements Runnable {public static ReentrantLock lock = new ReentrantLock();public static int i = 0;@Overridepublic void run() {for (int j = 0; j < 1000000; j++) {lock.lock();// lock.lock();try {System.out.println(Thread.currentThread().getName());i++;} finally {lock.unlock();// lock.unlock();}}}public static void main(String args[]) throws InterruptedException {ReenterLock tl = new ReenterLock();Thread t1 = new Thread(tl, "t1");Thread t2 = new Thread(tl, "t2");t1.start();t2.start();t1.join();t2.join();System.out.println(i);}}