记事本界面

[java]代码库

package myframe;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JToolBar;
import java.io.*;

public class notepad extends JFrame implements ActionListener {

    JMenuBar menu;
    JMenu menu1, menu2, menu3, menu4, menu5;
    JMenuItem mi2, mi3, mi4, mi5, mi6;
    JMenu ej;
    JMenuItem ej1, ej2;

    JToolBar toolbar;
    JButton button1, button2, button3, button4, button5;

    JTextArea textarea;
    JScrollPane gdt;

    public notepad() {
        
        toolbar = new JToolBar();
        button1 = new JButton("新建");
        button2 = new JButton("打开");
        button3 = new JButton("剪切");
        button4 = new JButton("复制");
        button5 = new JButton("粘贴");

        menu = new JMenuBar();
        menu1 = new JMenu("文件        ");
       // menu1.setFont(null);
        //menu1.setMnemonic('f');
        menu2 = new JMenu("编辑(E)");
        menu2.setMnemonic('e');
        menu3 = new JMenu("格式(O)");
        menu3.setMnemonic('O');
        menu4 = new JMenu("查看(V)");
        menu4.setMnemonic('V');
        menu5 = new JMenu("帮助(H)");
        menu5.setMnemonic('H');

        ej = new JMenu("新建");
        ej1 = new JMenuItem("文件");
        ej2 = new JMenuItem("模板");

        mi2 = new JMenuItem("打开");
        mi2.addActionListener(this);
        mi2.setActionCommand("open");
        mi3 = new JMenuItem("保存（S）");
        mi3.setMnemonic('s');
        mi3.addActionListener(this);
        mi3.setActionCommand("save");

        mi4 = new JMenuItem("另存为");
        mi5 = new JMenuItem("页面布局");
        mi6 = new JMenuItem("退出");

        textarea = new JTextArea();
        gdt = new JScrollPane(textarea);

        toolbar.add(button1);
        toolbar.add(button2);
        toolbar.add(button3);
        toolbar.add(button4);
        toolbar.add(button5);

        ej.add(ej1);
        ej.add(ej2);
        menu.add(ej);
        menu1.add(ej);
        menu1.add(mi2);
        menu1.addSeparator();
        menu1.add(mi3);
        menu1.add(mi4);
      //  menu1.addSeparator();
        menu1.add(mi5);
        menu1.add(mi6);

        menu.add(menu1);
        menu.add(menu2);
        menu.add(menu3);
        menu.add(menu4);
        menu.add(menu5);
        menu.add(menu5);

        this.setTitle("记事本");
        this.setSize(800, 700);
        this.setJMenuBar(menu);
        this.add(toolbar, BorderLayout.SOUTH);
        this.add(gdt);
        this.setDefaultCloseOperation(3);
        this.setVisible(true);
    }

    public static void main(String[] args) {
        JFrame notepad = new notepad();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        String s = e.getActionCommand();
        if (s.equals("open")) {
            JFileChooser choose = new JFileChooser();
            choose.setDialogTitle("打开文件");
            choose.showOpenDialog(null);
            choose.setVisible(true);

            String path = choose.getSelectedFile().getAbsolutePath();//GET the whole path of the file

            FileReader read = null;
            BufferedReader bufferread = null;

            try {
                read = new FileReader(path);
                bufferread = new BufferedReader(read);

                String f = "", c = "";
                while ((f = bufferread.readLine()) != null) {
                    c = c + (f + "\n");
                }
                textarea.setText(c);
            } catch (Exception e1) {

            } finally {
                try {
                    read.close();
                    bufferread.close();
                } catch (Exception e1) {

                }
            }

        } else if (s.equals("save")) {
            JFileChooser ch= new JFileChooser();
            ch.setDialogTitle("另存为");
            ch.showSaveDialog(null);
            ch.setVisible(true);
            
            String path= ch.getSelectedFile().getAbsolutePath();
            try{
                PrintStream p1 = new PrintStream(path);
                System.setOut(p1);
                System.out.println(this.textarea.getText());
            }catch(Exception e2){
                
            }
            
        }
    }
}

[代码运行效果截图]