Multiple markers at this line - The serializable class HelloWorld does not declare a static final serialVersionUID field of type long - The public type HelloWorld must be defined in its own file - The type HelloWorld is already defined-慕课网

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Multiple markers at this line - The serializable class HelloWorld does not declare a static final serialVersionUID field of type long - The public type HelloWorld must be defined in its own file - The type HelloWorld is already defined

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Atendu_陈

2015-01-23 16:54

import java.awt.*; //引入java.awt包中的类

import java.applet.*; //引入java.applet包中的类

public class HelloWorld extends Applet //这里有小错误。不知道什么意思怎么改？

{

public void paint(Graphics g )

{

g.drawString("Hello World!",5,35);

}

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