java中的 java.util.concurrent.locks.ReentrantLock类中的lockInterruptibly()方法介绍

在java的 java.util.concurrent.locks包中，ReentrantLock类实现了lock接口，lock接口用于加锁和解锁限制，加锁后必须释放锁，其他的线程才能进入到里面执行，否则出现死锁现象。

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lockInterruptibly()方法介绍：

此方法返回的为获取锁的方法，但是当线程调用了interrupt()方法后，此方法将会返回一个异常，导致线程的中断。即线程中断。

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代码实例如下：

package TestThread.ThreadLockDemo;

import java.util.concurrent.locks.ReentrantLock;

public class TestLock {
	public static void main(String[] args) {
		ReentrantLock lock = new ReentrantLock();// 初始化lock对象
		Test2 test2 = new Test2("苹果", 100);// 初始化苹果的数量
		Test1 test1 = new Test1(lock, 10, test2);// 初始化线程对象
		Thread t1 = new Thread(test1, "线程1");// 创建线程
		Thread t2 = new Thread(test1, "线程2");
		Thread t3 = new Thread(test1, "线程3");
		Thread t4 = new Thread(test1, "线程4");
		Thread t5 = new Thread(test1, "线程5");
		// t1.start();// 启动线程
		t2.start();
		t4.start();
		t5.start();
		t4.interrupt();
		t3.start();

	}
}

class Test1 implements Runnable {
	private int count;
	private ReentrantLock lock;
	private Test2 test2;

	public Test1(ReentrantLock lock, int count, Test2 test2) {
		this.lock = lock;
		this.count = count;
		this.test2 = test2;
	}

	@Override
	public void run() {
		// try {
		// lock.lock();
		// Thread.sleep(1);
		// System.out.println(Thread.currentThread().getName() + ":开锁成功");
		// } catch (InterruptedException e) {
		// e.printStackTrace();
		// } finally {
		// lock.unlock();
		// System.out.println(Thread.currentThread().getName() + ":闭锁成功");
		// }

		// lock.tryLock()测试
		// if (lock.tryLock()) {
		// try {
		// // Thread.sleep(1000);
		// System.out.println(Thread.currentThread().getName() + ":当前线程已经开启锁!");
		// } catch (Exception e) {
		// System.out.println(Thread.currentThread().getName() + ":当前线程中断了!");
		// } finally {
		// lock.unlock();
		// System.out.println(Thread.currentThread().getName() + ":释放锁成功!");
		// }
		// } else {
		// System.out.println(Thread.currentThread().getName() + ":未获取到锁!");
		// }
		try {
			lock.lockInterruptibly();
			try {
				System.out.println(Thread.currentThread().getName() + ":当前线程获取线程锁!");
			} catch (Exception e) {
				System.out.println(Thread.currentThread().getName() + ":当前线程发生系统异常！");
			} finally {
				lock.unlock();
				System.out.println(Thread.currentThread().getName() + ":释放锁成功！");
			}
		} catch (InterruptedException e) {
			System.out.println(Thread.currentThread().getName() + ":当前线程中断！");
		}
	}
}

class Test2 {
	private String name;
	int count;

	/**
	 * @param name苹果的名字
	 * @param count初始化苹果的数量
	 */
	public Test2(String name, int count) {
		this.name = name;
		this.count = count;
	}

	/**
	 * * @author 作者 E-mail:
	 *
	 * @date 创建时间：2017年3月24日 下午1:13:14
	 * @version 1.0
	 * @parameter
	 * @since
	 * @return
	 */
	public void DiscountApple(int discount) {
		this.count = this.count - discount;
		System.out.println(Thread.currentThread().getName() + ":苹果的数量为：" + this.count + ",卖掉了" + discount);
	}
}

运行结果如下：

更新代码如下：

package TestThread.ThreadLockDemo;

import java.util.concurrent.locks.ReentrantLock;

public class TestLock {
    public static void main(String[] args) {
        ReentrantLock lock = new ReentrantLock();// 初始化lock对象
        Test2 test2 = new Test2("苹果", 100);// 初始化苹果的数量
        Test1 test1 = new Test1(lock, 10, test2);// 初始化线程对象
        Thread t1 = new Thread(test1, "线程1");// 创建线程
        Thread t2 = new Thread(test1, "线程2");
        Thread t3 = new Thread(test1, "线程3");
        Thread t4 = new Thread(test1, "线程4");
        Thread t5 = new Thread(test1, "线程5");
        Thread t6 = new Thread(test1, "线程6");
        // t1.start();// 启动线程
        t2.start();
        t4.start();
        t5.start();
        t4.interrupt();
        t3.start();
        t6.start();

    }
}

class Test1 implements Runnable {
    private int count;
    private ReentrantLock lock;
    private Test2 test2;

    public Test1(ReentrantLock lock, int count, Test2 test2) {
        this.lock = lock;
        this.count = count;
        this.test2 = test2;
    }

    @Override
    public void run() {
        try {
            lock.lockInterruptibly();
            try {
                Thread.sleep(1000);
                test2.DiscountApple(count);
                // Thread.sleep(1000);
            } catch (InterruptedException e) {
                System.out.println(Thread.currentThread().getName() + ":当前线程发生系统异常！");
            } finally {
                lock.unlock();
                System.out.println(Thread.currentThread().getName() + ":释放锁成功！");
            }
        } catch (InterruptedException e) {
            System.out.println(Thread.currentThread().getName() + ":当前线程中断！");
        }
    }
}

class Test2 {
    private String name;
    int count;

    /**
     * @param name苹果的名字
     * @param count初始化苹果的数量
     */
    public Test2(String name, int count) {
        this.name = name;
        this.count = count;
    }

    /**
     * * @author 作者 E-mail:
     *
     * @date 创建时间：2017年3月24日 下午1:13:14
     * @version 1.0
     * @parameter
     * @since
     * @return
     */
    public void DiscountApple(int discount) {
        this.count = this.count - discount;
        System.out.println(Thread.currentThread().getName() + ":苹果的数量为：" + this.count + ",卖掉了" + discount);
    }
}

执行结果为：