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Topic: 小弟求救！(aaa is not abstract and does not override abstract method)

1.小弟求救！(aaa is not abstract and does not override abstract method)

Posted by: sss6586576
Posted on: 2004-10-10 10:08

{ 请尽量用准确的文字描述作为标题 }

小弟求救！弄了一个上午，也不知是咋回事．

import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class aaa extends Applet implements WindowListener/*,ActionListener*/
{

public aaa()
{
super();
Panel p=new Panel();
Button b1=new Button();
Button b2=new Button();
Button b3=new Button();
TextField t=new TextField(10);
b1.setLabel("1");
b2.setLabel("2");
b3.setLabel("+");
/*b1.addActionListener(this);？？？？？？？为什么不让俺注册呢！！！
b2.addActionListener(this);
b3.addActionListener(this);*/
p.add(b1);
p.add(b2);
p.add(b3);
add Phone

;
add

;

p.setVisible(true);
}
public void windowClosing(WindowEvent aaa){System.exit(1);}
public void windowOpened(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowActivated(WindowEvent e){}
public void windowDeactivated(WindowEvent e){}

/*public void actionPerformed(ActionEvent e, Object O)
{
String s;
int n;
s=e.getActionCommand();

*/
请问e.getsource怎么用呀？？
　　　谢谢各位大侠．小弟已经抓狂了！！！！
　　G:\java\11\aaa.java:6: aaa is not abstract and does not override abstract method 　　　　actionPerformed(java.awt.event.ActionEvent) in java.awt.event.ActionListener
　　public class aaa extends Applet implements WindowListener,ActionListener
　　这到底是什么意思呀？？？我就是不懂呀．哪位大侠能帮帮我呀！谢谢！！！！！！！！！！！！！！！！！！！！！！！！

2.Re:小弟求救！弄了一个上午，也不知是咋回事． [Re: sss6586576]	Copy to clipboard
Posted by: archonLing Posted on: 2004-10-10 10:16 you have the wrong signature for actionpPerform(). you have ActionEvent, Object). However, it need to have "public void actionPerformed(ActionEvent e)" like the compiler message says.

3.Re:小弟求救！弄了一个上午，也不知是咋回事． [Re: sss6586576]	Copy to clipboard
Posted by: sss6586576 Posted on: 2004-10-10 10:23 可以具体一点吗？？？？谢谢了！！

4.Re:小弟求救！弄了一个上午，也不知是?厥拢?></td></tr><tr class= [Re: sss6586576]

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Posted by: archonLing
Posted on: 2004-10-10 10:27

/*public void actionPerformed(ActionEvent e, Object O)
{
String s;
int n;
s=e.getActionCommand();

*/
请问e.getsource怎么用呀？？
　　　谢谢各位大侠．小弟已经抓狂了！！！！
　　G:\java\11\aaa.java:6: aaa is not abstract and does not override abstract method 　　　　actionPerformed(java.awt.event.ActionEvent) in java.awt.event.ActionListener
　　public class aaa extends Applet implements WindowListener,ActionListener
　　这到底是什么意思呀？？？我就是不懂呀．哪位大侠能帮帮我呀！谢谢！！！！！！！！！！！！！！！！！！！！！！！！

Use "public void actionPerformed(ActionEvent e)"

5.Re:小弟求救！弄了一个上午，也不知是咋回事． [Re: sss6586576]	Copy to clipboard
Posted by: caike Posted on: 2004-10-10 13:02 implements WindowListener,ActionListener 意思是实现 WindowListener,ActionListener这两个接口，所以才可以写成.addActionListener(this);

6.Re:小弟求救！(aaa is not abstract and does not override abstract method) [Re: sss6586576]	Copy to clipboard
Posted by: kiffen Posted on: 2004-10-11 17:06 windowListener里面最少有6个抽象函数，如果你要实现功能，通过另外的类实现拾配器

7.Re:小弟求救！(aaa is not abstract and does not override abstract method) [Re: sss6586576]	Copy to clipboard
Posted by: cjyzpcl Posted on: 2004-10-12 14:33 "implements WindowListener"改为"extends WindowAdapter",这样就可以不用全部实现接口WindowListener中的所有方法了。