8.2 应用示例-Java语言基础8-Java多线程

当前位置:　首页>> 技术小册>> Java语言基础8-Java多线程

示例：使用 volatile 关键字

```bash
package com.github.demo11;

/**
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public class Money {
    public static volatile int money = 100000;
}
```

```bash
package com.github.demo11;

/**
 * 女孩线程
 * 
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public class SubThread1 extends Thread {

@Override
    public void run() {
        while (Money.money == 100000) {

}
        System.out.println("结婚基金已经不是10万了");
    }
}
```
```bash
package com.github.demo11;

/**
 * 男孩线程
 * 
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public class SubThread2 extends Thread {

@Override
    public void run() {
        try {
            Thread.sleep(10);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

Money.money = 90000;
    }
}
```

```bash
package com.github.demo11;

/**
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public class Test {
    public static void main(String[] args) {
        SubThread1 subThread1 = new SubThread1();
        subThread1.setName("小路同学");
        SubThread2 subThread2 = new SubThread2();
        subThread2.setName("小皮同学");

subThread1.start();
        subThread2.start();
    }
}
```

示例：使用 synchronized 同步代码块
```bash
package com.github.demo12;

/**
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public class Money {
    public static int money = 100000;
}
```

```bash
package com.github.demo12;

/**
 * 女孩线程
 * 
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public class SubThread1 extends Thread {

@Override
    public void run() {
        while (true) {
            synchronized (Money.class) {
                if (Money.money != 100000) {
                    System.out.println("结婚基金已经不是10万了");
                    break;
                }
            }
        }

}
}
```

```bash
package com.github.demo12;

/**
 * 男孩线程
 * 
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public class SubThread2 extends Thread {

@Override
    public void run() {
        synchronized (Money.class) {
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

Money.money = 90000;
        }
    }
}
```

```bash
package com.github.demo12;

/**
 * synchronized同步代码块 
 * ① 线程获取锁 
 * ② 清空变量副本 
 * ③ 拷贝共享变量最新值到变量副本中
 * ④ 执行代码
 * ⑤ 将修改后的变量副本中的值赋值给共享数据
 * ⑥ 释放锁
 * 
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public class Test {
    public static void main(String[] args) {
        SubThread1 subThread1 = new SubThread1();
        subThread1.setName("小路同学");
        SubThread2 subThread2 = new SubThread2();
        subThread2.setName("小皮同学");

subThread1.start();
        subThread2.start();
    }
}
```

该分类下的相关小册推荐：

Java高并发秒杀入门与实战

SpringBoot合辑-初级篇

Java语言基础10-Java中的集合

Mybatis合辑4-Mybatis缓存机制

Java面试指南

Java语言基础1-基础知识

Java语言基础4-数组详解

Mybatis合辑3-Mybatis动态SQL

Java必知必会-Maven初级

Java必知必会-Maven高级

Java语言基础9-常用API和常见算法

Java性能调优实战