一、ReentrantLock

package com.ietree.basicskill.mutilthread.lock;import java.util.concurrent.locks.Lock;import java.util.concurrent.locks.ReentrantLock;/** * Created by Administrator on 2017/5/17. */public class UseReentrantLock { private Lock lock = new ReentrantLock(); public void method1(){ try { lock.lock(); System.out.println("当前线程:" + Thread.currentThread().getName() + "进入method1.."); Thread.sleep(1000); System.out.println("当前线程:" + Thread.currentThread().getName() + "退出method1.."); Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } finally { lock.unlock(); } } public void method2(){ try { lock.lock(); System.out.println("当前线程:" + Thread.currentThread().getName() + "进入method2.."); Thread.sleep(2000); System.out.println("当前线程:" + Thread.currentThread().getName() + "退出method2.."); Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } finally { lock.unlock(); } } public static void main(String[] args) { final UseReentrantLock ur = new UseReentrantLock(); Thread t1 = new Thread(new Runnable() { @Override public void run() { ur.method1(); ur.method2(); } }, "t1"); t1.start(); try { Thread.sleep(10); } catch (InterruptedException e) { e.printStackTrace(); } //System.out.println(ur.lock.getQueueLength()); }}

二、ReentrantReadWriteLock

package com.ietree.basicskill.mutilthread.lock;import java.util.concurrent.locks.ReentrantReadWriteLock;/** * Created by Administrator on 2017/5/17. */public class UseReentrantReadWriteLock { private ReentrantReadWriteLock rwLock = new ReentrantReadWriteLock(); private ReentrantReadWriteLock.ReadLock readLock = rwLock.readLock(); private ReentrantReadWriteLock.WriteLock writeLock = rwLock.writeLock(); public void read(){ try { readLock.lock(); System.out.println("当前线程:" + Thread.currentThread().getName() + "进入..."); Thread.sleep(3000); System.out.println("当前线程:" + Thread.currentThread().getName() + "退出..."); } catch (Exception e) { e.printStackTrace(); } finally { readLock.unlock(); } } public void write(){ try { writeLock.lock(); System.out.println("当前线程:" + Thread.currentThread().getName() + "进入..."); Thread.sleep(3000); System.out.println("当前线程:" + Thread.currentThread().getName() + "退出..."); } catch (Exception e) { e.printStackTrace(); } finally { writeLock.unlock(); } } public static void main(String[] args) { final UseReentrantReadWriteLock urrw = new UseReentrantReadWriteLock(); Thread t1 = new Thread(new Runnable() { @Override public void run() { urrw.read(); } }, "t1"); Thread t2 = new Thread(new Runnable() { @Override public void run() { urrw.read(); } }, "t2"); Thread t3 = new Thread(new Runnable() { @Override public void run() { urrw.write(); } }, "t3"); Thread t4 = new Thread(new Runnable() { @Override public void run() { urrw.write(); } }, "t4");// t1.start();// t2.start();// t1.start(); // R// t3.start(); // W t3.start(); t4.start(); }}

三、Condition

package com.ietree.basicskill.mutilthread.lock;import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.Lock;import java.util.concurrent.locks.ReentrantLock;/** * Created by Administrator on 2017/5/17. */public class UseCondition { private Lock lock = new ReentrantLock(); private Condition condition = lock.newCondition(); public void method1(){ try { lock.lock(); System.out.println("当前线程：" + Thread.currentThread().getName() + "进入等待状态.."); Thread.sleep(3000); System.out.println("当前线程：" + Thread.currentThread().getName() + "释放锁.."); condition.await(); // Object wait System.out.println("当前线程：" + Thread.currentThread().getName() +"继续执行..."); } catch (Exception e) { e.printStackTrace(); } finally { lock.unlock(); } } public void method2(){ try { lock.lock(); System.out.println("当前线程：" + Thread.currentThread().getName() + "进入.."); Thread.sleep(3000); System.out.println("当前线程：" + Thread.currentThread().getName() + "发出唤醒.."); condition.signal(); //Object notify } catch (Exception e) { e.printStackTrace(); } finally { 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(); }}

四、ManyCondition

package com.ietree.basicskill.mutilthread.lock;import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.ReentrantLock;/** * Created by Administrator on 2017/5/17. */public class UseManyCondition { private ReentrantLock lock = new ReentrantLock(); private Condition c1 = lock.newCondition(); private Condition c2 = lock.newCondition(); public void m1(){ try { lock.lock(); System.out.println("当前线程：" +Thread.currentThread().getName() + "进入方法m1等待.."); c1.await(); System.out.println("当前线程：" +Thread.currentThread().getName() + "方法m1继续.."); } catch (Exception e) { e.printStackTrace(); } finally { lock.unlock(); } } public void m2(){ try { lock.lock(); System.out.println("当前线程：" +Thread.currentThread().getName() + "进入方法m2等待.."); c1.await(); System.out.println("当前线程：" +Thread.currentThread().getName() + "方法m2继续.."); } catch (Exception e) { e.printStackTrace(); } finally { lock.unlock(); } } public void m3(){ try { lock.lock(); System.out.println("当前线程：" +Thread.currentThread().getName() + "进入方法m3等待.."); c2.await(); System.out.println("当前线程：" +Thread.currentThread().getName() + "方法m3继续.."); } catch (Exception e) { e.printStackTrace(); } finally { lock.unlock(); } } public void m4(){ try { lock.lock(); System.out.println("当前线程：" +Thread.currentThread().getName() + "唤醒.."); c1.signalAll(); } catch (Exception e) { e.printStackTrace(); } finally { lock.unlock(); } } public void m5(){ try { lock.lock(); System.out.println("当前线程：" +Thread.currentThread().getName() + "唤醒.."); c2.signal(); } catch (Exception e) { e.printStackTrace(); } finally { lock.unlock(); } } public static void main(String[] args) { final UseManyCondition umc = new UseManyCondition(); Thread t1 = new Thread(new Runnable() { @Override public void run() { umc.m1(); } },"t1"); Thread t2 = new Thread(new Runnable() { @Override public void run() { umc.m2(); } },"t2"); Thread t3 = new Thread(new Runnable() { @Override public void run() { umc.m3(); } },"t3"); Thread t4 = new Thread(new Runnable() { @Override public void run() { umc.m4(); } },"t4"); Thread t5 = new Thread(new Runnable() { @Override public void run() { umc.m5(); } },"t5"); t1.start(); // c1 t2.start(); // c1 t3.start(); // c2 try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } t4.start(); // c1 try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } t5.start(); // c2 }}

以上这篇浅谈多线程中的锁的几种用法总结(必看)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。