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添加synchronized类和静态方法
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‎src/main/java/com/chen/api/util/thread/study/chapter2/synBlockMoreObjectOneLock/Service.java‎

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package com.chen.api.util.thread.study.chapter2.synBlockMoreObjectOneLock;
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/**
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* 静态同步
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*
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* @author chen weijie
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* @date 2018-04-16 1:54 AM
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*/
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public class Service {
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public static void printA() {
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synchronized (Service.class) {
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try {
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System.out.println("线程名称为:" + Thread.currentThread().getName() + "在" + System.currentTimeMillis() + "进入printA()");
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Thread.sleep(3000);
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System.out.println("线程名称为:" + Thread.currentThread().getName() + "在" + System.currentTimeMillis() + "退出printA()");
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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}
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public static void printB() {
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synchronized (Service.class) {
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System.out.println("线程名称为:" + Thread.currentThread().getName() + "在" + System.currentTimeMillis() + "进入printB()");
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System.out.println("线程名称为:" + Thread.currentThread().getName() + "在" + System.currentTimeMillis() + "退出printB()");
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}
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}
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}

‎src/main/java/com/chen/api/util/thread/study/chapter2/synBlockMoreObjectOneLock/Test.java‎

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package com.chen.api.util.thread.study.chapter2.synBlockMoreObjectOneLock;
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/**
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* synchronized(class)代码块和synchronized static方法的作用一样.
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*
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* @author chen weijie
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* @date 2018-04-16 3:29 AM
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*/
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public class Test {
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public static void main(String[] args) {
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Service service1 = new Service();
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Service service2 = new Service();
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ThreadA threadA = new ThreadA(service1);
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ThreadB threadB = new ThreadB(service2);
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threadA.setName("a");
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threadB.setName("b");
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threadA.start();
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threadB.start();
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}
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}

‎src/main/java/com/chen/api/util/thread/study/chapter2/synBlockMoreObjectOneLock/ThreadA.java‎

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package com.chen.api.util.thread.study.chapter2.synBlockMoreObjectOneLock;
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/**
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* @author chen weijie
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* @date 2018-04-16 2:52 AM
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*/
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public class ThreadA extends Thread {
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private Service service;
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public ThreadA(Service service) {
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super();
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this.service = service;
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}
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@Override
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public void run() {
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service.printA();
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}
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}

‎src/main/java/com/chen/api/util/thread/study/chapter2/synBlockMoreObjectOneLock/ThreadB.java‎

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package com.chen.api.util.thread.study.chapter2.synBlockMoreObjectOneLock;
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/**
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* @author chen weijie
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* @date 2018-04-16 2:52 AM
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*/
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public class ThreadB extends Thread {
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private Service service;
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public ThreadB(Service service) {
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super();
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this.service = service;
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}
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@Override
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public void run() {
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service.printB();
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}
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}

‎src/main/java/com/chen/api/util/thread/study/chapter2/synBlockingString2/Service.java‎

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package com.chen.api.util.thread.study.chapter2.synBlockingString2;
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/**
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* 对象监视器不同,所以运行结果就是异步的.
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*
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* @author chen weijie
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* @date 2018-04-15 2:26 AM
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*/
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public class Service {
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private String anyString = new String();
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public void a() {
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try {
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synchronized (anyString) {
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System.out.println("线程名称为:" + Thread.currentThread().getName() + "在" + System.currentTimeMillis() + "进入同步块");
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Thread.sleep(3000);
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System.out.println("线程名称为:" + Thread.currentThread().getName() + "在" + System.currentTimeMillis() + "离开同步块");
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}
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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synchronized public void b() {
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System.out.println("b begin");
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System.out.println("b end");
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}
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}

‎src/main/java/com/chen/api/util/thread/study/chapter2/synBlockingString2/Test.java‎

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package com.chen.api.util.thread.study.chapter2.synBlockingString2;
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/**
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* @author chen weijie
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* @date 2018-04-15 2:33 AM
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*/
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public class Test {
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public static void main(String[] args) {
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Service service = new Service();
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ThreadA threadA = new ThreadA(service);
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ThreadB threadB = new ThreadB(service);
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threadA.setName("aaaaaaaaaaaaaaaaaaaa");
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threadB.setName("bbbbbbbbbbbbbbbbbbbb");
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threadA.start();
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threadB.start();
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}
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}

‎src/main/java/com/chen/api/util/thread/study/chapter2/synBlockingString2/ThreadA.java‎

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package com.chen.api.util.thread.study.chapter2.synBlockingString2;
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/**
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* @author chen weijie
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* @date 2018-04-15 2:31 AM
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*/
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public class ThreadA extends Thread {
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private Service service;
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public ThreadA(Service service) {
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super();
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this.service = service;
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}
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@Override
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public void run() {
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super.run();
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service.a();
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}
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}

‎src/main/java/com/chen/api/util/thread/study/chapter2/synBlockingString2/ThreadB.java‎

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package com.chen.api.util.thread.study.chapter2.synBlockingString2;
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/**
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* @author chen weijie
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* @date 2018-04-15 2:31 AM
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*/
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public class ThreadB extends Thread {
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private Service service;
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public ThreadB(Service service) {
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super();
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this.service = service;
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}
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@Override
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public void run() {
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super.run();
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service.b();
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}
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}

‎src/main/java/com/chen/api/util/thread/study/chapter2/syn_out_asyn/MyList.java‎

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package com.chen.api.util.thread.study.chapter2.syn_out_asyn;
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import com.chen.api.util.thread.study.chapter2.synBlockingString2.ThreadA;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* @author chen weijie
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* @date 2018-04-16 12:27 AM
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*/
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public class MyList {
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private List list = new ArrayList();
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synchronized public void add(String userName) {
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System.out.println("ThreadName = " + Thread.currentThread().getName() + "执行了add方法!");
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list.add(userName);
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System.out.println("ThreadName = " + Thread.currentThread().getName() + "退出了add方法!");
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}
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synchronized public int getSize() {
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System.out.println("ThreadName = " + Thread.currentThread().getName() + "执行了getSize方法!");
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int sizeValue = list.size();
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System.out.println("ThreadName = " + Thread.currentThread().getName() + "退出了getSize方法!");
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return sizeValue;
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}
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}

‎src/main/java/com/chen/api/util/thread/study/chapter2/syn_out_asyn/Test.java‎

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package com.chen.api.util.thread.study.chapter2.syn_out_asyn;
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/**
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* 结果是成对出现的,所以方法是同步执行的
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* <p>
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* 同步快中的代码是同步打印的,当前线程执行是成对出现的.但线程A和线程B的执行却是异步的,这样可能出现脏读的环境.
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*
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* @author chen weijie
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* @date 2018-04-16 12:35 AM
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*/
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public class Test {
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public static void main(String[] args) {
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MyList list = new MyList();
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ThreadA threadA = new ThreadA(list);
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ThreadB threadB = new ThreadB(list);
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threadA.setName("A");
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threadB.setName("B");
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threadA.start();
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threadB.start();
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}
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}

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