Java开发网 - 为什么没显示?

Topic: 为什么没显示?

1.为什么没显示?

Posted by: yangxin
Posted on: 2005-10-16 07:40

各位同志好,小弟刚JAVA,因为自学,书后又无答案,所以遇到这问题就给难住了,希望各位能帮帮忙,谢谢了.
我编写了一小段代码,如下:
// Created by Rocky
// Practice Applet
//
// ///////////////////////////
import java.awt.Graphics;
import java.applet.Applet;
public class PracticeApplet extends Applet
{
public void mydraw(Graphics g)
{
g.drawString("* * * * * * * * * * * * * * * * * * * * * * * * *",25,18);
g.drawString("* * Practice makes Perfect!",26,18);
g.drawString("* * * * * * * * * * * * * * * * * * * * * * * * *",27,18);
} // end of method: mydraw
} // end of class: PracticeApplet
编译能通过,但执行时APPLET查看器里并无显示内容,我真想不透是怎么回事.请各位高手帮帮我吧.

2.Re:为什么没显示?(Applet) [Re: yangxin]	Copy to clipboard
Posted by: why Posted on: 2005-10-16 08:40 Why would you think it will show anything? public void mydraw(Graphics g) ==> public void paint(Graphics g)

3.Re:为什么没显示? [Re: yangxin]	Copy to clipboard
Posted by: yangxin Posted on: 2005-10-16 21:16 Thanks very much. The book use the method name:"paint",but I think it is not important what the method name is,so I created one,and then wrong,wrong again. So it is the problem,I know,thank you!

4.Re:为什么没显示? [Re: yangxin]	Copy to clipboard
Posted by: why Posted on: 2005-10-16 22:22 Read and think before you ask a question. How could you possibly think that the method name is not important What made you think that mydraw would be executed, by an intelligent java compiler or VM?

5.Re:为什么没显示? [Re: yangxin]	Copy to clipboard
Posted by: rhvic Posted on: 2005-10-17 11:09 You should not ask such questions: first:the who call the method mydraw()?

6.Re:为什么没显示? [Re: yangxin]

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Posted by: wnhoo
Posted on: 2005-10-17 12:14

import java.applet.Applet;
import java.awt.Graphics;
import java.awt.HeadlessException;

public class PracticeApplet extends Applet {

  public void paint(Graphics g){
    g.drawString("* * * * * * * * * * * * * * * * * * * * * * * * *",25,18);
    g.drawString("* * Practice makes Perfect!",26,18);
    g.drawString("* * * * * * * * * * * * * * * * * * * * * * * * *",27,18);
  }

  public PracticeApplet() throws HeadlessException {
    super();
    // TODO Auto-generated constructor stub
  }

}