同一个线程（同一个Thread.currentThread()）共享同一份数据

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

/**
 * 同一个线程（同一个Thread.currentThread()）共享同一份数据，不同线程数据不同
 * @author MrRock
 *运行结果
 *  Main--->Thread-0  data is : -90400073
	threadA--->Thread-0  data is : -90400073
	threadB--->Thread-0  data is : -90400073
	
	Main--->Thread-1  data is : 840715215
	threadA--->Thread-1  data is : 840715215
	threadB--->Thread-1  data is : 840715215
 *
 */
public class ThreadShareData {
	//使用map来存放数据，key为当前线程，value为要共享的数据
	private static Map<Thread,Integer> currentThread = new HashMap<Thread,Integer>();
	public static void main(String[] args) {
		for (int i = 1; i <= 2; i++) {
			new Thread(new Runnable() {
				@Override
				public void run() {
					int data = new Random().nextInt();
					currentThread.put(Thread.currentThread(), data);
					System.out.println("Main--->" + Thread.currentThread().getName() + "  data is : " + data);
					new A().getData();
					new B().getData();
				}
			}).start();
		}
	}

	static class A {
		void getData() {
			//从map中取出当前线程的值
			int data = currentThread.get(Thread.currentThread());
			System.out.println("threadA--->" + Thread.currentThread().getName() + "  data is : " + data);
		}
	}

	static class B {
		void getData() {
			//从map中取出当前线程的值
			int data = currentThread.get(Thread.currentThread());
			System.out.println("threadB--->" + Thread.currentThread().getName()+ "  data is : " + data);
		}
	}
}