java程序编译出错，求help

Question

我是菜鸟，我在试验多线程时编译程序时报错：找不到方法currentTimeMillis（）；
import java.util.*;
class TimePrint extends Thread
{ 
int pause;
String name;
public TimePrint(int pause,String name)
{
this.pause=pause;
this.name=name;
}
public void run()
{ 
while(true)
{ 
try
{
System.out.println("Thread"+name+":"+new Date(currentTimeMillis()));
Thread.sleep(pause);
}
catch(Exception e)
{
e.getMessage();
}
}

}
public static void main(String [] args)
{
Thread timePrinta=new TimePrint(1000,"a");
timePrinta.start();
Thread timePrintb=new TimePrint(3000,"b");
timePrintb.start();
}
}

Answer 1

把currentTimeMillis()改为System.currentTimeMillis()

Answer 2

把currentTimeMillis()改为System.currentTimeMillis()

Answer 3

把currentTimeMillis()改为System.currentTimeMillis()，currentTimeMillis()方法是静态方法，用类名引用，

Answer 4

System.out.println("Thread"+name+":"+new Date(currentTimeMillis()));中的currentTimeMillis()改为System.currentTimeMillis()是静态方法，需要类名调用

Answer 5

对啊 是 系统System的静态方法吗  还得sys 输出System.out.println("Thread"+name+":"+new Date(currentTimeMillis()));中的currentTimeMillis()改为System.currentTimeMillis()是静态方法，需要类名调用

Answer 6

new Date(System.currentTimeMillis())