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例子一：

public class Test6 extends Thread{public static void main(String[] args) {	new Test6().start();	new Test6().start();}public void run(){	test();}static ThreadLocal
   
     local=new ThreadLocal
    
     ();//ThreadLocal是用资源空间换取时间的做法//ThreadLocal底层代码使用一个静态的内部类ThreadLocalMap存储副本变量，好让另一个线程使用static int num;public void test(){	while(true){		try {			Thread.sleep(1000);		} catch (InterruptedException e) {			e.printStackTrace();		}		System.out.println(Thread.currentThread().getName()+"::"+local.get()+"::"+num++);		if(local.get()==null){			local.set(0);		}else{			int temp=local.get();			local.set(++temp);		}	}}}/*  输出结果如下：  	Thread-0::null::0	Thread-1::null::1	Thread-0::0::2	Thread-1::0::3	Thread-0::1::4	Thread-1::1::5	Thread-0::2::6	Thread-1::2::7	Thread-0::3::8	Thread-1::3::9*/
    
   

例子二：

public class Test8 {static Map
   
     map=new HashMap
    
     ();//static int data;public static void main(String[] args) {	for(int i=0;i<2;i++){		new Thread(){			public void run(){				int num=new Random().nextInt();				System.out.println("has put : "+num);//				data=num;				map.put(Thread.currentThread(), num);				new A().getData();				new B().getData();			}		}.start();	}}static class A{	public void getData(){		System.out.println(Thread.currentThread().getName()+": A data:"+/*data*/map.get(Thread.currentThread()));	}}static class B{	public void getData(){		System.out.println(Thread.currentThread().getName()+": B data:"+/*data*/map.get(Thread.currentThread()));	}}}
    
   

例子三：

public class Test9 {public static void main(String[] args) {	for(int i=0;i<2;i++){		new Thread(new Runnable(){			public void run(){				int num=new Random().nextInt();				MyThreadScopeData ins=MyThreadScopeData.getThreadInstance();				System.out.println(Thread.currentThread().getName()+":num:"+num);				ins.setData(num);				ins.setName("name:"+num);				ins.getData();				ins.getName();			}		}).start();	}}}class MyThreadScopeData{	private static ThreadLocal
   
     local=new ThreadLocal
    
     ();	private MyThreadScopeData(){}//单例模式	public static MyThreadScopeData getThreadInstance(){		MyThreadScopeData mythread=local.get();		if(mythread==null){			local.set(new MyThreadScopeData());		}		return local.get();	}	private String name;	private Integer data;	public void getName() {		System.out.println(Thread.currentThread().getName()+":"+name);	}	public void setName(String name) {		this.name = name;	}	public void getData() {		System.out.println(Thread.currentThread().getName()+":"+data);	}	public void setData(Integer data) {		this.data = data;	}}
    
   

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