9.本地線程(ThreadLoca)

ThreadLoca

提升一個線程的局部變量，訪問某個線程都有本身的局部變量，當使用ThreadLoca爲每一個使用該變量的線程提供獨立的變量副本，因此每個線程均可以獨立的改變本身的副本，二不會影響到其它線程對應的副本

 

package com.jlong;

 

class Res{

    ThreadLocal<Integer> threadLocal = new ThreadLocal<Integer>(){

        @Override

        protected Integer initialValue() {

            return 0;

        }

    };

}

class ThreadLoca extends Thread{

    private Res res;

   public ThreadLoca(Res res){

        this.res=res;

    }

    @Override

    public void run() {

        for (int i = 0; i <3 ; i++) {

            System.out.println(getName()+"----"+i);

        }

    }

}

 

public class ThreadLocaTest {

    public static void main(String[] args) {

        Res res = new Res();

        ThreadLoca threadLoca1 = new ThreadLoca(res);

        ThreadLoca threadLoca2 = new ThreadLoca(res);

        threadLoca1.start();

        threadLoca2.start();

 

    }

 

}