threadLocal实例

编程技术  /  houtizong 发布于 3年前   67

实例1

package com.bijian.thread;public class MyThread extends Thread {private static ThreadLocal tl = new ThreadLocal() {protected synchronized Object initialValue() {return new Integer(sernum++);}};private static int sernum = 100;MyThread(String name) {super(name);}public void run() {for (int i = 0; i < 5; i++)System.out.println(getName() + " " + tl.get());}}

 

package com.bijian.thread;public class ThreadLocalDemo1 {public static void main(String[] args) {MyThread mt1 = new MyThread("A");MyThread mt2 = new MyThread("B");MyThread mt3 = new MyThread("C");mt1.start();mt2.start();mt3.start();}}

 

运行结果:
C 101A 100B 102A 100C 101A 100B 102A 100C 101A 100B 102C 101B 102C 101B 102

 

实例2

package com.bijian.thread;public class MyThread extends Thread {private static ThreadLocal tl = new ThreadLocal();private static int sernum = 100;MyThread(String name) {super(name);}public void run() {synchronized ("A") {tl.set("" + sernum++);}for (int i = 0; i < 10; i++)System.out.println(getName() + " " + tl.get());}}

 

package com.bijian.thread;public class ThreadLocalDemo2 {public static void main(String[] args) {MyThread mt1 = new MyThread("A");MyThread mt2 = new MyThread("B");MyThread mt3 = new MyThread("C");mt1.start();mt2.start();mt3.start();}}

 

运行结果:
A 100B 101A 100C 102A 100B 101A 100C 102A 100B 101C 102B 101C 102B 101C 102

 

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