Java开发网 - 各大虾帮忙看看~谢谢

Topic: 各大虾帮忙看看~谢谢

1.各大虾帮忙看看~谢谢

Posted by: kakaka0
Posted on: 2004-12-02 10:53

我的程序不知道什么错误，我是菜鸟帮帮忙吧！！
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Adder implements ActionListener
{
  JFrame AdderFame;
  JTextField TOprand1;
  JTextField TOprand2;
  JLabel LAdd,LSum;
  JButton BAdd;
  int i=0;
  public Adder()
  {
    AdderFrame=new JFrame("AdderFrame");
    TOprand1=new JTextField("0.0");
    TOprand2=new JTextField("0.0");
    LAdd=new JLabel("+");
    LSum=new JLabel("= ");
    BAdd=new JButton("Add!");
    AdderFrame.getContentPane().setLayout(new FlowLayout());
    AdderFrame.getContentPane().add(TOprand1);
    AdderFrame.getContentPane().add(LAdd);
    AdderFrame.getContentPane().add(TOprand2);
    AdderFrame.getContentPane().add(LSum);
    AdderFrame.getContentPane().add(BAdd);
    AdderFrame.pack();
    AdderFrame.setVisible(true);


    BAdd.addActionListener(this);

    public void actionPerformed(ActionEvent event)
    {
      i=(i=1)%2;
       if(i==1)
       {
         int sum=(int)(Double.valueOf(TOprand1.getText()).doubleValue()+Double.valueOf(TOprand.getText()).doubleValue());
         LSum.setText("="+sum);
       }else{
         TOpand1.setText("0.0");
         TOpand2.serText("0.0");
         LSum.setText("=");
       };
    }
    AdderFrame.addWindowListener(new WindowAdapter()
    {
      public void windowClosing(WindowEvent e)
      {
        System.exit(0);
      }
    });
  }
  public static void main(String[] args){
    Adder adder=new Adder();}
}
错误：--------------------Configuration: <Default>--------------------
C:\Adder.java:32: illegal start of expression
public void ActionPerformed(ActionEvent event)
^
1 error

Process completed.

2.Re:各大虾帮忙看看~谢谢 [Re: kakaka0]	Copy to clipboard
Posted by: miaomiao9527 Posted on: 2004-12-03 15:04 把public去掉马原因我也不清楚

3.Re:各大虾帮忙看看~谢谢 [Re: kakaka0]	Copy to clipboard
Posted by: yorksaddam Posted on: 2004-12-03 22:01 你的构造函数有问题,应该是没有返回值的

4.Re:各大虾帮忙看看~谢谢 [Re: kakaka0]

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Posted by: kakaka0
Posted on: 2004-12-05 21:37

有人帮我改成这样就没事
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Adder implements ActionListener
{
public JFrame AdderFrame;
public JTextField TOprand1;
public JTextField TOprand2;
public JLabel LAdd,LSum;
public JButton BAdd;
public int i=0;
public void actionPerformed(ActionEvent event)
{
i=(i=1)%2;
if(i==1)
{
int sum=(int)(Double.valueOf(TOprand1.getText()).doubleValue()+Double.valueOf(TOprand1.getText()).doubleValue());
LSum.setText("="+sum);
}else{
TOprand1.setText("0.0");
TOprand2.setText("0.0");
LSum.setText("=");
}
}

public Adder()
{
AdderFrame=new JFrame("AdderFrame");
TOprand1=new JTextField("0.0");
TOprand2=new JTextField("0.0");
LAdd=new JLabel("+");
LSum=new JLabel("= ");
BAdd=new JButton("Add!");
AdderFrame.getContentPane().setLayout(new FlowLayout());
AdderFrame.getContentPane().add(TOprand1);
AdderFrame.getContentPane().add(LAdd);
AdderFrame.getContentPane().add(TOprand2);
AdderFrame.getContentPane().add(LSum);
AdderFrame.getContentPane().add(BAdd);
AdderFrame.pack();
AdderFrame.setVisible(true);

BAdd.addActionListener(this);
//
// public void actionPerformed(ActionEvent event)
// {
// i=(i=1)%2;
// if(i==1)
// {
// int sum=(int)(Double.valueOf(TOprand1.getText()).doubleValue()+Double.valueOf(TOprand.getText()).doubleValue());
// LSum.setText("="+sum);
// }else{
// TOpand1.setText("0.0");
// TOpand2.serText("0.0");
// LSum.setText("=");
// }
// }
AdderFrame.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});

}
public static void main(String[] args){
Adder adder=new Adder();}
}
但按我以前的程序的顺序改回去就又不行了。究竟怎么回事呢？
知道的告诉我吧～～谢谢

5.Re:各大虾帮忙看看~谢谢 [Re: kakaka0]	Copy to clipboard
Posted by: littledeer1974 Posted on: 2004-12-05 22:08 你的贴名改的更明确一点，会有更多的人进来帮你的，不要就只写[各大虾帮忙看看~谢谢]，再写的具体一点，多传递一点信息好吗？

6.Re:各大虾帮忙看看~谢谢 [Re: kakaka0]

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Posted by: tcxmn
Posted on: 2004-12-07 23:30

错误一:
public void actionPerformed(ActionEvent event)
{...................}
这个过程应该从构造器里移动出来,而你的程序中是放在构造器中了
错误二:
JFrame AdderFame; 应该是AdderFrame拼写错误
错误三:
int sum=(int)(Double.valueOf(TOprand1.getText()).doubleValue()+Double.valueOf(TOprand.getText()).doubleValue());
应该是
int sum=(int)(Double.valueOf(TOprand1.getText()).doubleValue()+Double.valueOf(TOprand2.getText()).doubleValue());
TOprand2
错误四:
TOpand1.setText("0.0");
TOpand2.serText("0.0");都应该改成TOprand1,TOprand2.并且是setText.你有个写成了serText.
最后楼主在发程序的时候要说明这个程序的目的,别人才好排错.

7.Re:各大虾帮忙看看~谢谢 [Re: kakaka0]	Copy to clipboard
Posted by: tcxmn Posted on: 2004-12-07 23:36 错误五: else{ TOpand1.setText("0.0"); TOpand2.serText("0.0"); LSum.setText("="); }; 后面的";"是多余的

8.Re:各大虾帮忙看看~谢谢 [Re: kakaka0]

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Posted by: tcxmn
Posted on: 2004-12-07 23:40

最终正确的代码如下:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Adder implements ActionListener {
JFrame AdderFrame;
JTextField TOprand1;
JTextField TOprand2;
JLabel LAdd, LSum;
JButton BAdd;
int i = 0;
//构造器---------------------------------------------------
public Adder() {
AdderFrame = new JFrame("AdderFrame");
TOprand1 = new JTextField("0.0");
TOprand2 = new JTextField("0.0");
LAdd = new JLabel("+");
LSum = new JLabel("= ");
BAdd = new JButton("Add!");
AdderFrame.getContentPane().setLayout(new FlowLayout());
AdderFrame.getContentPane().add(TOprand1);
AdderFrame.getContentPane().add(LAdd);
AdderFrame.getContentPane().add(TOprand2);
AdderFrame.getContentPane().add(LSum);
AdderFrame.getContentPane().add(BAdd);
AdderFrame.pack();
AdderFrame.setVisible(true);
BAdd.addActionListener(this);

AdderFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}//构造器结束----------------------------------------

//实现ActionListener接口--------------------------------------------
public void actionPerformed(ActionEvent event) {
i = (i = 1) % 2;
if (i == 1) {
int sum = (int) (Double.valueOf(TOprand1.getText()).doubleValue() +
Double.valueOf(TOprand2.getText()).doubleValue());
LSum.setText("=" + sum);
}
else {
TOprand1.setText("0.0");
TOprand2.setText("0.0");
LSum.setText("=");
}

}
//程序的入口--------------------------------------------
public static void main(String[] args) {
Adder adder = new Adder();
}
}

9.Re:各大虾帮忙看看~谢谢 [Re: kakaka0]	Copy to clipboard
Posted by: tcxmn Posted on: 2004-12-07 23:45 奇怪,我原来有格式的,怎么发上去就没有了.不好意思了....

10.Re:各大虾帮忙看看~谢谢 [Re: kakaka0]	Copy to clipboard
Posted by: kakaka0 Posted on: 2004-12-09 07:53 多谢各位帮忙～受益不浅