package com.mesnac.qc.A1;import java.util.HashMap;
import java.util.Hashtable;public class Foo {private int x = 100;private HashMap hMap = new HashMap();private Hashtable hTab = new Hashtable();public int getX(){return x;}public HashMap getHMap(){return hMap;}public Hashtable getHTab(){return hTab;}public Hashtable htb(Object key,Object value){hTab.put(key, value);return hTab;}public HashMap hfx(Object key,Object value){hMap.put(key, value);return hMap;}public int fix(int y){synchronized(this){x = x - y;}return x;}
}

package com.mesnac.qc.A1;import java.util.HashMap;
import java.util.Hashtable;public class MyRunable implements Runnable{private Foo a1 = new Foo();public void run(){for(int i = 0;i < 3; i++){a1.fix(20);a1.hfx(Integer.valueOf(i), Integer.valueOf(i));a1.htb(Integer.valueOf(i), Integer.valueOf(i));try {Thread.sleep(1);} catch (Exception e) {// TODO: handle exception
            }System.out.println(Thread.currentThread().getName()+"当前Foo值"+a1.getX());System.out.println(Thread.currentThread().getName()+"当前HMAP值"+a1.getHMap());System.out.println(Thread.currentThread().getName()+"当前HTable值"+a1.getHTab());}}public static void main(String args[]){MyRunable aMyRunable = new MyRunable();Thread a = new Thread(aMyRunable,"Thread-A");Thread bThread = new Thread(aMyRunable,"Thread-B");a.start();bThread.start();HashMap t1 = new HashMap();t1.put(Integer.valueOf(0), Integer.valueOf(0));t1.put(Integer.valueOf(0), Integer.valueOf(0));t1.put(Integer.valueOf(0), Integer.valueOf(0));t1.put(Integer.valueOf(0), Integer.valueOf(0));Hashtable t2 = new Hashtable();t2.put(Integer.valueOf(0), Integer.valueOf(0));t2.put(Integer.valueOf(0), Integer.valueOf(0));t2.put(Integer.valueOf(0), Integer.valueOf(0));t2.put(Integer.valueOf(0), Integer.valueOf(0));t2.put(Integer.valueOf(0), Integer.valueOf(1));System.out.println(t1);System.out.println(t2);}}