java 多線程（五）

package com.thread.threadTest;


import java.util.Random;



public class ThreadLocalTest {

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

     private static  ThreadLocal<MyThreadScopeData> myThreadScopeData = new ThreadLocal<MyThreadScopeData>();

    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();
                    threadLocal.set(data);
                    System.out.println(Thread.currentThread().getName() + "has put data : " + data);
//                    MyThreadScopeData myData = new MyThreadScopeData();
//                    myData.setName(" name " + data);
//                    myData.setAge(data);
//                    myThreadScopeData.set(myData);
                    MyThreadScopeData.getThreadInstance().setName("name" + data);
                    MyThreadScopeData.getThreadInstance().setAge(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);
            /*MyThreadScopeData myData = myThreadScopeData.get();
            System.out.println("A from " + Thread.currentThread().getName() + "getMyData : " + myData.getName() + ","+ myData.getAge());*/
            MyThreadScopeData myData = MyThreadScopeData.getThreadInstance();
            System.out.println("A from " + Thread.currentThread().getName() + "getMyData : " + myData.getName() + ","+ myData.getAge());

        }

    }

    static class B {
        public void get() {
            int data = threadLocal.get();
            System.out.println("B from " + Thread.currentThread().getName() + "get data : " + data);
            /*MyThreadScopeData myData = myThreadScopeData.get();
            System.out.println("B from " + Thread.currentThread().getName() + "getMyData : " + myData.getName() + ","+ myData.getAge());*/
            MyThreadScopeData myData = MyThreadScopeData.getThreadInstance();
            System.out.println("A from " + Thread.currentThread().getName() + "getMyData : " + myData.getName() + ","+ myData.getAge());
        }
    }

}

class MyThreadScopeData{
    private MyThreadScopeData(){}

    public static /*synchronized*/ MyThreadScopeData getThreadInstance(){
        MyThreadScopeData instance = map.get();
        if(instance == null ){
            instance = new MyThreadScopeData();
            map.set(instance);
        }
        return instance;
    }

    // private static  MyThreadScopeData instance = null;// new MyThreadScopeData();

    private static  ThreadLocal<MyThreadScopeData> map = new ThreadLocal<MyThreadScopeData>();

    private String name;
    private int age;


    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}