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  • java 多线程 day05 线程范围内的数据共享

    import java.util.HashMap;
    import java.util.Map;
    import java.util.Random;
    /**
    * Created by chengtao on 17/12/3.
    * 线程范围内的数据共享:即模块从不同的线程获取到的值是不一样的
    * 可以通过 hashMap<thread,data> 来将线程和对应的值通过map来区分
    */

    public class Thread0501_ThreadScopeShareData {

    private static int data = 0;
    public static void main(String[] args) {
    for(int i=0;i<2;i++){
    new Thread(new Runnable(){
    public void run() {
    data = new Random().nextInt();
    System.out.println(Thread.currentThread().getName()
    + " has put data :" + data);
    new A().get();
    new B().get();
    }
    }).start();
    }
    }

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

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




    ----------------------------
    ----------------------------
    ----------------------------
    import java.util.HashMap;
    import java.util.Map;
    import java.util.Random;

    /**
    * Created by chengtao on 17/12/3.
    * 线程间的数据共享
    */



    public class Thread0502_ThreadScopeShareData {

    private static int data = 0;
    private static Map<Thread, Integer> threadData = new HashMap<Thread, Integer>();
    public static void main(String[] args) {
    for(int i=0;i<2;i++){
    new Thread(new Runnable(){
    public void run() {
    int data = new Random().nextInt();
    System.out.println(Thread.currentThread().getName()
    + " has put data :" + data);
    threadData.put(Thread.currentThread(), data);
    new A().get();
    new B().get();
    }
    }).start();
    }
    }

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

    static class B{
    public void get(){
    int data = threadData.get(Thread.currentThread());
    System.out.println("B from " + Thread.currentThread().getName()
    + " get data :" + data);
    }
    }
    }
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  • 原文地址:https://www.cnblogs.com/ctaixw/p/7967538.html
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