threadLocal的使用

1.threadLocal的定义：

2.测试代码

class Test{
    private ThreadLocal<String> str = new ThreadLocal<String>();
    private List<String> list = new ArrayList<String>();
class A extends Thread {
        public void run() {        
            str.set("zhangsan");
            System.out.println("A...." + str.get());
            list.add("xxx");
            System.out.println("A<<<"+list.get(0));
        }}
class B extends Thread {
        public void run() {        
            System.out.println("B...." + str.get());
            list.add("xxx");
            System.out.println("B<<<"+list.get(0));
}}}    

 

   Test2 t=new Test2();
   Test2.A a=t.new A();
   Test2.B b=t.new B();
   a.start();
   b.start();