Java实现并发线程中线程范围内共享数据

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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 stubfor(int i=0;i<2;i++){new Thread(new Runnable() {                @Overridepublic void run() {// TODO Auto-generated method stubint 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);
}
}
}
}