ThreadLocal实现线程范围的共享变量 代码示例

package org.wy.threadlocal;


import java.util.Random;


public class ThreadLocalTest {


private static ThreadLocal<Integer> threadLocal = new ThreadLocal<Integer>();


public static void main(String[] args) {


for (int i = 0; i < 2; i++) {
new Thread(new Runnable() {


@Override
public void run() {
int data = new Random().nextInt();
System.out.println(Thread.currentThread().getName()
+ " has put data : " + data);
threadLocal.set(data);
new A().get();
new B().get();


}
}).start();
}
}


static class A {
public void get() {
int data = threadLocal.get();
System.out.println("A from " + Thread.currentThread().getName()
+ " get data : " + data);
}
}


static class B {
public void get() {
int data = threadLocal.get();
System.out.println("B from " + Thread.currentThread().getName()
+ " get data : " + data);
}
}
}