ThreadLocal 测试多线程变量实例

ThreadLocal，很多地方叫做线程本地变量，也有些地方叫做线程本地存储，其实意思差不多。可能很多朋友都知道ThreadLocal为变量在每个线程中都创建了一个副本，那么每个线程可以访问自己内部的副本变量。

public class ThreadLocalTest {
	ThreadLocal<Long> longLocal = new ThreadLocal<Long>();
    ThreadLocal<String> stringLocal = new ThreadLocal<String>();
 
     
    public void set() {
        longLocal.set(Thread.currentThread().getId());
        stringLocal.set(Thread.currentThread().getName());
    }
     
    public long getLong() {
        return longLocal.get();
    }
     
    public String getString() {
        return stringLocal.get();
    }
     
    public static void main(String[] args) throws InterruptedException {
        final ThreadLocalTest test = new ThreadLocalTest();
         
         
        test.set();
        System.out.println("----------main---------------");
        System.out.println(test.getLong());
        System.out.println(test.getString());
     
         
        Thread thread1 = new Thread(){
            public void run() {
                test.set();
                System.out.println("----------thread1---------------");
                System.out.println(test.getLong());
                System.out.println(test.getString());
                System.out.println("-------------------------");
            };
        };
        thread1.start();
        thread1.join();
        Thread thread2 = new Thread(){
            public void run() {
                test.set();
                System.out.println("---------thread2----------------");
                System.out.println(test.getLong());
                System.out.println(test.getString());
                System.out.println("-------------------------");
            };
        };
        thread2.start();
        thread2.join();
        System.out.println("----------main---再次查看主线程值------------");
        System.out.println(test.getLong());
        System.out.println(test.getString());
    }
}

原作：http://www.cnblogs.com/dolphin0520/p/3920407.html