[求助]请教此程序有何错误

public class HelloArgs{
public static void main(String args[])
{
System.out.println(args[0]+","+args[1]+" Hello!");
}
}
运行说：“Exception in thread"main"java.lang.ArryIndexOuyOfBoundsException:0
at HelloArgs.main(HelloArgs.java:4)
请教下是哪里错了