仿照windows的记事本编写一个GUI窗口程序

Question

java 的demo里有notePad这个源代码

Answer 1

哈哈 jdk自带的demo下就有一个

Answer 2

编写窗口
自己写就ok啦找本<jfc核心编程>
看看就ok啦

Answer 3

搞个JFrame，里面添加个JTextArea,然后美观一下界面，就这么简单！

Answer 4

import java.io.*;import javax.swing.*;public class SimpleSwingTextEditor {    private JFrame frame = null; //  @jve:decl-index=0:visual-constraint="19,7"    private javax.swing.JPanel jContentPane = null;    private javax.swing.JPanel jPanel = null;    private javax.swing.JButton jButton = null;    private javax.swing.JButton jButton1 = null;    private javax.swing.JButton jButton2 = null;    private javax.swing.JScrollPane jScrollPane = null;    private javax.swing.JTextArea jTextArea = null;    private javax.swing.JFileChooser jFileChooser = null;    private boolean hasChanged = false;    private static final String title = "Simple Swing Text Editor";    public static void main(String[] args) {
        SimpleSwingTextEditor thisClass = new SimpleSwingTextEditor();
        thisClass.createFrame();
        thisClass.frame.show();
    }    private void createFrame() {
        jButton = new javax.swing.JButton();
        jButton.setText("Load File");
        jButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent e) {
                loadFile();
            }
        });
        
        jButton1 = new javax.swing.JButton();
        jButton1.setText("Save File");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent e) {
                saveFile();
            }
        });        jButton2 = new javax.swing.JButton();
        jButton2.setText("Exit");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent e) {
                doExit();
            }
        });        jPanel = new javax.swing.JPanel();
        jPanel.add(jButton, null);
        jPanel.add(jButton1, null);
        jPanel.add(jButton2, null);        jTextArea = new javax.swing.JTextArea();
        jTextArea.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyTyped(java.awt.event.KeyEvent e) {
                if (!hasChanged) {
                    frame.setTitle(title + " *");
                    hasChanged = true;
                }
            }
        });        jScrollPane = new javax.swing.JScrollPane();
        jScrollPane.setViewportView(jTextArea);        jFileChooser = new javax.swing.JFileChooser();
        jFileChooser.setMultiSelectionEnabled(false);        frame = new JFrame();
        frame.setSize(480, 284);
        frame.setTitle(title);
        frame.setDefaultCloseOperation(javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE);
        frame.addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent e) {
                doExit();
            }
        });        jContentPane=(JPanel)(frame.getContentPane());
        jContentPane.setLayout(new java.awt.BorderLayout());
        jContentPane.add(jPanel, java.awt.BorderLayout.SOUTH);
        jContentPane.add(jScrollPane, java.awt.BorderLayout.CENTER);
        jContentPane.setBorder(javax.swing.BorderFactory.createEmptyBorder(
                5, 5, 5, 5));
    }    private void loadFile() {
        int state = jFileChooser.showOpenDialog(frame);
        if (state == JFileChooser.APPROVE_OPTION) {
            File f = jFileChooser.getSelectedFile();
            try {
                BufferedReader br = new BufferedReader(new FileReader(f));
                jTextArea.read(br, null);
                br.close();
                frame.setTitle(title);
                hasChanged = false;
            } catch (FileNotFoundException e1) {
                e1.printStackTrace();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }
    }    private void saveFile() {
        int state = jFileChooser.showSaveDialog(frame);
        if (state == JFileChooser.APPROVE_OPTION) {
            File f = jFileChooser.getSelectedFile();
            try {
                BufferedWriter bw = new BufferedWriter(new FileWriter(f));
                jTextArea.write(bw);
                bw.close();
                frame.setTitle(title);
                hasChanged = false;
            } catch (FileNotFoundException e1) {
                e1.printStackTrace();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }
    }    private void doExit() {
        if (hasChanged) {
            int state = JOptionPane.showConfirmDialog(frame,
                    "File has been changed. Save before exit?","Save Changes?",JOptionPane.YES_NO_CANCEL_OPTION);
            if (state == JOptionPane.YES_OPTION) {
                saveFile();
            } else if (state == JOptionPane.CANCEL_OPTION) {
                return;
            }
        }
        System.exit(0);
    }
}