Java小程序莫名溢出
import java.awt.*;
import java.awt.event.*;
import java.math.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.JOptionPane;
public class Exec
{
public static void main(String args[])
{
new Winp("Basic Application Example");
}
}
class Winp extends Frame implements ActionListener
{
File file;
FileReader reader;
BufferedReader in;
FileDialog file_open;
StringTokenizer fenxi;
BigInteger a1,a2,a3;
MenuBar bar;
Menu menu1,menu2;
MenuItem item1,item2;
TextField text1,text2,text3;
Panel panel;
Label label;
Box box1,box2,box3;
Button button1,button2;
Winp(String s)
{
super(s);
bar=new MenuBar();
menu1=new Menu("File");
menu2=new Menu("Help");
menu2.addActionListener(this);
item1=new MenuItem("Open");
item1.addActionListener(this);
item2=new MenuItem("help...");
menu2.add(item2);
item2.addActionListener(this);
bar.add(menu1);bar.add(menu2);
menu1.add(item1);
setMenuBar(bar);
button1=new Button("获取题目");
button1.addActionListener(this);
button2=new Button("确认答案");
button2.addActionListener(this);
box1=Box.createHorizontalBox();
box3=Box.createVerticalBox();
text1=new TextField(10);
text1.setEditable(false);
text2=new TextField(10);
text2.setEditable(false);
text3=new TextField(16);
box1.add(button1);
box1.add(text1);box1.add(new Label("+"));
box1.add(text2);box1.add(new Label("="));
box1.add(text3);
panel=new Panel();
panel.add(button2);
label=new Label(null);
panel.add(label);
add(box1,BorderLayout.NORTH);
add(panel,BorderLayout.CENTER);
setBounds(240,240,500,300);
file_open=new FileDialog(this,"打开文件对话框",FileDialog.LOAD);
file_open.setVisible(false);
file_open.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
file_open.setVisible(false);
}
}
);
setVisible(true);
validate();
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
}
public void actionPerformed(ActionEvent ev)
{
if(ev.getSource()==item1)
{
file_open.setVisible(true);
if(file_open.getFile()!=null)
{
try
{
file=new File(file_open.getDirectory(),file_open.getFile());
reader=new FileReader(file);
in=new BufferedReader(reader);
}
catch(IOException io){}
}
}
else if(ev.getSource()==button1)
{
if(file==null)
{
label.setText("Please choose file first!");
text3.setText(null);
this.validate();
}
else
{
try
{
String s=in.readLine();
if(s.startsWith("-1"))
{
label.setText("测试完毕");
text1.setText(null);text2.setText(null);text3.setText(null);
in.close();
reader.close();
}
else
{
fenxi=new StringTokenizer(s," ,");
a1=new BigInteger(fenxi.nextToken());
text1.setText(a1.toString());

a2=new BigInteger(fenxi.nextToken());
text2.setText(a2.toString());
a3=a1.add(a2);
}
}
catch(IOException we){}
}
}
else if(ev.getSource()==button2)
{
try
{
String s1=null;
s1=text3.getText();
if(s1==null){}
else if(s1.equals(a3.toString()))
{
label.setText("答案正确");
this.validate();
}
else
{
label.setText("答案错误");
this.validate();
}
}
catch(NumberFormatException nm)
{
text3.setText("please input your anwser!");
}
}
else if(ev.getSource()==item2)
{
JOptionPane.showMessageDialog(this,"此程序从文件中读入两个数，可判断用户输入结果的正误与否，按钮‘获得题目’\n与‘确认答案’分别帮助用户获得题目与确认答案","帮助",JOptionPane.INFORMATION_MESSAGE);
}
}
}
[解决办法]
问题补充
文件内数据举例
221313 475485793
1231231 2323
123 45


按正常顺序读取文件然后操作没问题，但是如果不读文件直接点击“确认答案”就会出一堆错误，怎么解决？
ps.哪位教一下怎么按格式将代码贴出来
[解决办法]
[img=http://][/img]
[解决办法]
看的好累
[解决办法]
已解决，只要在构造函数中将按钮初始设为setEnabled(false);读取文件后改为true即可
哈哈！