线程范围内数据共享

 利用ThreadLocal类  实现以下功能

写一个类，使得该类在创建对象后，满足 同一个线程在不同模块下还是同一个对象

class zhu
{
	private static ThreadLocal <zhu> tl=new ThreadLocal();
	private zhu(){};
	private static zhu zhu1=null;
	public static zhu getInstance()
	{
      		zhu1=tl.get();
      		if(zhu1==null)
      		{
      		   zhu1=new zhu();
      		   tl.set(zhu1);
      		   
      		}
      		return zhu1;
      		
	}
	}
public class shujugongxiang {

public static void main(String[]args)
{
	
	for(int i=1;i<=2;i++)
	{
	new Thread(new Runnable()
			{
	public void run()
	{
		
		Thread b=Thread.currentThread();
	   zhu bba=zhu.getInstance();
		System.out.println(b.getName()+"对应的是"+bba);
		
		A aa=new A();
		aa.zhuyao();
		B bb=new B();
		bb.zhuyao();
		
	}
			}).start();
	}
	}
static class A
{
   
    
    public void zhuyao()
    {
    	 zhu a=zhu.getInstance();
    	System.out.println("from A"+Thread.currentThread().getName()+"实例是"+a);
    }
    
	}
static class B
{
    
  
    public void zhuyao()
    {
    	zhu a=zhu.getInstance();
    	System.out.println("from B"+Thread.currentThread().getName()+"实例是"+a);
	}
}
}