---恢复内容开始---
利用Map,HashMap键值对的数据结构,实现并发线程中线程范围内数据共享。
package cn.qy.heima2; import java.util.HashMap; import java.util.Map; import java.util.Random; public class ThreadScopeShareData { private static int data; private static Map<Thread,Integer> threadData=new HashMap<Thread,Integer>(); public static void main(String[] args) { // TODO Auto-generated method stub for(int i=0;i<2;i++) { new Thread(new Runnable() { @Override public void run() { // TODO Auto-generated method stub 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() { synchronized (ThreadScopeShareData.class) { data=threadData.get(Thread.currentThread()); System.out.println("A from"+Thread.currentThread().getName()+"get data:"+data); } } } static class B { public synchronized void get() { synchronized (ThreadScopeShareData.class) { data=threadData.get(Thread.currentThread()); System.out.println("B from"+Thread.currentThread().getName()+"get data:"+data); } } } }
---恢复内容结束---