package test;
/**
@since [产品/模块版本] (可选)*/public class TestThread extends Thread {private int i = 0;
public void run() {System.out.println("123");}
}线程start之后子类调用父类构造函数不是为空的构造函数,是 Thread(ThreadGroup group, String name)
http://blog.csdn.net/chen__fei/article/details/48066429