/**

 * java线程锁分为读写锁 ReadWriteLock 其中多个读锁不互斥，读锁和写锁互斥，写锁和写锁互斥

 *

 * @author

 *

 *

 *

 */

public class ReadWriteLockTest {

    public static void main(String[] args) {

        final Operation operation = new Operation();

        for (int i = 1; i <= 3; i++) {

            new Thread(new Runnable() {

                @Override

                public void run() {

                    operation.getData();

                }

            }).start();

            new Thread(new Runnable() {

                @Override

                public void run() {

                    operation.putData(new Random().nextInt(1000));

                }

            }).start();

        }

    }

}

class Operation{

    private ReadWriteLock rwl = new ReentrantReadWriteLock();    //读写锁

    private int data;

    public void getData(){

        rwl.readLock().lock();

        try {

            System.out.println(Thread.currentThread().getName()+" be readly get data ");

            Thread.sleep(1000);

            System.out.println(Thread.currentThread().getName()+" have data value :" + data);

        } catch (InterruptedException e) {

            e.printStackTrace();

        }finally{

            rwl.readLock().unlock();

        }

    }

    public void putData(int data){

        rwl.writeLock().lock();

        try {

            System.out.println(Thread.currentThread().getName()+" be readly write data");

            Thread.sleep(1000);

            this.data = data;

            System.out.println(Thread.currentThread().getName() + " have write data value : "+ data);

        } catch (InterruptedException e) {

            e.printStackTrace();

        }finally{

            rwl.writeLock().unlock();

        }

    }

}