现有java编辑记事本代码里边有错误,请各位大神修改

发布网友发布时间：2022-05-26 21:29

共2个回答

热心网友时间：2023-11-03 19:19

提问者，你好：

我试了一下，你这个项目中新建文件功能没实现，其他的都OK了！原因：缺少括号！

请叫我雷锋！

import java.awt.*;
import java.awt.event.*;
import java.io.FileReader;
import java.io.FileWriter;
import javax.swing.JFileChooser;
public class ff extends Frame implements ActionListener{
   MenuBar mainmenubar=new MenuBar();
   Menu file;
   MenuItem nw;
   MenuItem op;
   MenuItem cl;
   MenuItem sf;
   MenuItem ex;
   TextArea tx;
   public ff(String title){
    super(title);
    CloseHandler handler=new CloseHandler();
    this.addWindowListener(handler);
    setSize(400,400);
    setLocationRelativeTo(null);
    menuinit();
    tx=new TextArea();
    this.add(tx);
    setVisible(true);
    }
   void menuinit(){
    mainmenubar=new MenuBar();
    file= new Menu(" 文件");
    nw=new MenuItem("新建文件");
    op=new MenuItem("打开文件");
    cl=new MenuItem("关闭文件");
    sf=new MenuItem("保存文件");
    ex=new MenuItem("退        出");
    file.add(nw);
    file.add(op);
    file.add(cl);
    file.add(sf);
    file.add(ex);
    mainmenubar.add(file);
    setMenuBar(mainmenubar);
    nw.addActionListener(this);
    op.addActionListener(this);
    cl.addActionListener(this);
    sf.addActionListener(this);
    ex.addActionListener(this);
}
   public void actionPerformed(ActionEvent e){
    System.out.println();
    Object ob=e.getSource();
    javax.swing.JFileChooser f=new JFileChooser();
    if((ob==nw)||(ob==cl)){
     tx.setText("");
    }else if(ob==op){
     f.showOpenDialog(this);
     try{
      StringBuffer s=new StringBuffer();
      FileReader in=new FileReader(f.getSelectedFile());
      while(true){
       int b=in.read();
       if(b==-1){     //此处加括号
          break;
       }
       s.append((char)b);
      }
      tx.setText(s.toString());
      in.close();
     }catch(Exception ee){

     }//此处你少括号了！
    }else if(ob==sf){
     f.showSaveDialog(this);
     try{
      FileWriter out=new FileWriter(f.getSelectedFile());
      out.write(tx.getText());
      out.close();
     }catch(Exception ee){

     }
    }else if(ob==ex);
  System.exit(0);
   }
   //程序的入口
public static void main(String[] args){
  new ff("简易文本编辑器");
     }
}
class CloseHandler extends WindowAdapter{
  public void windowClosing(WindowEvent e){
  System.exit(0);
}
}

热心网友时间：2023-11-03 19:19

import java.awt.*;
import java.awt.event.*;
import java.io.FileReader;
import java.io.FileWriter;
import javax.swing.JFileChooser;
public class ff extends Frame implements ActionListener {
MenuBar mainmenubar = new MenuBar();
Menu file;
MenuItem nw;
MenuItem op;
MenuItem cl;
MenuItem sf;
MenuItem ex;
TextArea tx;
public ff(String title) {
super(title);
CloseHandler handler = new CloseHandler();
this.addWindowListener(handler);
setSize(400, 400);
setLocationRelativeTo(null);
menuinit();
tx = new TextArea();
this.add(tx);
setVisible(true);
}
void menuinit() {
mainmenubar = new MenuBar();
file = new Menu(" 文件");
nw = new MenuItem("新建文件");
op = new MenuItem("打开文件");
cl = new MenuItem("关闭文件");
sf = new MenuItem("保存文件");
ex = new MenuItem("退出");
file.add(nw);
file.add(op);
file.add(cl);
file.add(sf);
file.add(ex);
mainmenubar.add(file);
setMenuBar(mainmenubar);
nw.addActionListener(this);
op.addActionListener(this);
cl.addActionListener(this);
sf.addActionListener(this);
ex.addActionListener(this);
}
public void actionPerformed(ActionEvent e) {
Object ob = e.getSource();
javax.swing.JFileChooser f = new JFileChooser();
if ((ob == nw) || (ob == cl)) {
tx.setText("");
} else if (ob == op) {
f.showOpenDialog(this);
try {
StringBuffer s = new StringBuffer();
FileReader in = new FileReader(f.getSelectedFile());
while (true) {
int b = in.read();
if (b == -1) break;
s.append((char) b);
}
tx.setText(s.toString());
in.close();
} catch (Exception ee) {
}
} else if (ob == sf) {
f.showSaveDialog(this);
try {
FileWriter out = new FileWriter(f.getSelectedFile());
out.write(tx.getText());
out.close();
} catch (Exception ee) {
}
} else if (ob == ex)
;
System.exit(0);
}
public static void main(String[] args) {
new ff("简易文本编辑器");
}
}
class CloseHandler extends WindowAdapter {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
}