notebook.java

基于java开发的记事本

    import java.awt.*;
    import java.awt.event.*;
    import java.io.*;
    import java.util.*;
    import javax.swing.*;

    public class notebook {
    public static void main(String[] args)
    { note f=new note("我的记事本");
      f.setLocation(100,50); 
       }
     }

   class note extends JFrame implements ActionListener
   { String str,strnext,path,fname; 
    JPanel mainpane; 
    JFileChooser choose = new JFileChooser(); 
    Dialog find,replace; 
    JTextField findtxt,repltxt; 
    Font newfont;
    JButton findenter,replb; 
    JTextArea txt1; 
    File newfiles;
    JPopupMenu popm; 
    JMenu m1,m2,m3,m4,m6; 
    JMenuItem m61,m62,m26,m271,m34,p_copy,p_cut,p_paste,p_del,p_choose;
    int startp,endp,nexttemp,newstartp,newendp;
    note(String s) 
    {super(s);
    JMenuBar mb=new JMenuBar();
    fname=null; 
    findenter=new JButton("确定");
    findenter.addActionListener(this); 
    replb=new JButton("确定");
    replb.addActionListener(this);
    mainpane=(JPanel)this.getContentPane(); 
    mainpane.setLayout(new GridLayout(1,1)); 
    txt1=new JTextArea("",20,61);
    txt1.addMouseListener(new handlemouse(this));
    txt1.setFont(new Font("宋体",Font.PLAIN,18));
    mainpane.add(txt1, BorderLayout.CENTER); 
    JScrollPane sll = new JScrollPane(); 
    mainpane.add("Center", sll); ;
    sll.getViewport().add(txt1); 
    popm=new JPopupMenu(); 
    p_copy=new JMenuItem("复制 ");
    p_copy.addActionListener(this);
    KeyStroke keycopyp=KeyStroke.getKeyStroke(KeyEvent.VK_C,Event.CTRL_MASK); 
    p_copy.setAccelerator(keycopyp); 
    p_cut=new JMenuItem("剪切 ");
    p_cut.addActionListener(this);
    KeyStroke keycutp=KeyStroke.getKeyStroke(KeyEvent.VK_X,Event.CTRL_MASK); 
    p_cut.setAccelerator(keycutp); 
    p_paste=new JMenuItem("粘贴 ");
    p_paste.addActionListener(this);
    KeyStroke keypp=KeyStroke.getKeyStroke(KeyEvent.VK_V,Event.CTRL_MASK); 
    p_paste.setAccelerator(keypp); 
    p_del=new JMenuItem("删除 ");
    p_del.addActionListener(this);
    KeyStroke keydelp=KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,0); 
    p_del.setAccelerator(keydelp);
    p_choose=new JMenuItem("全选 "); 
    p_choose.addActionListener(this);
    KeyStroke keychoose=KeyStroke.getKeyStroke(KeyEvent.VK_A,Event.CTRL_MASK); 
    p_choose.setAccelerator(keychoose);
    popm.add(p_cut);
    popm.add(p_copy);
    popm.add(p_paste);
    popm.add(p_del);
    popm.add(p_choose);
    txt1.add(popm); 
    m1=new JMenu("文件(F)");
    m1.setMnemonic('F'); 

    JMenuItem m10=new JMenuItem("新建 ");
    m10.addActionListener(this); 
    KeyStroke keynew=KeyStroke.getKeyStroke(KeyEvent.VK_N,Event.CTRL_MASK); 
    m10.setAccelerator(keynew); 
    JMenuItem m11=new JMenuItem("打开...");
    m11.addActionListener(this);
    KeyStroke keyopen=KeyStroke.getKeyStroke(KeyEvent.VK_O,Event.CTRL_MASK); 
    m11.setAccelerator(keyopen); 
    JMenuItem m12=new JMenuItem("保存 ");
    m12.addActionListener(this);
    KeyStroke keysave=KeyStroke.getKeyStroke(KeyEvent.VK_S,Event.CTRL_MASK); 
    m12.setAccelerator(keysave); 
    JMenuItem m13=new JMenuItem("另存为...");
    m13.addActionListener(this);
    JMenuItem m14=new JMenuItem("退出 ");
    m14.addActionListener(this);
    KeyStroke keyexit=KeyStroke.getKeyStroke(KeyEvent.VK_F4,Event.ALT_MASK); 
    m14.setAccelerator(keyexit); 

    m2=new JMenu("编辑(E)");
    m2.setMnemonic('E');
    JMenuItem m21=new JMenuItem("复制 ");
    m21.addActionListener(this);
    KeyStroke keycopy=KeyStroke.getKeyStroke(KeyEvent.VK_C,Event.CTRL_MASK); 
    m21.setAccelerator(keycopy); 
    JMenuItem m22=new JMenuItem("剪切 ");
    m22.addActionListener(this);
    KeyStroke keycut=KeyStroke.getKeyStroke(KeyEvent.VK_X,Event.CTRL_MASK); 
    m22.setAccelerator(keycut); 
    JMenuItem m23=new JMenuItem("粘贴 ");
    m23.addActionListener(this);
    KeyStroke keyp=KeyStroke.getKeyStroke(KeyEvent.VK_V,Event.CTRL_MASK); 
    m23.setAccelerator(keyp); 
    JMenuItem m24=new JMenuItem("删除 ");
    m24.addActionListener(this);
    KeyStroke keydel=KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,0); 
    m24.setAccelerator(keydel); 
    JMenuItem m25=new JMenuItem("查找 ");
    m25.addActionListener(this);
    KeyStroke keyfind=KeyStroke.getKeyStroke(KeyEvent.VK_F,Event.CTRL_MASK); 
    m25.setAccelerator(keyfind); 
    m26=new JMenuItem("查找下一个 ");
    m26.addActionListener(this);
    KeyStroke keyfn=KeyStroke.getKeyStroke(KeyEvent.VK_F3,0); 
    m26.setAccelerator(keyfn); 
    m26.setEnabled(false);
    JMenuItem m27=new JMenuItem("替换 ");
    m27.addActionListener(this);
    KeyStroke keyrepl=KeyStroke.getKeyStroke(KeyEvent.VK_H,Event.CTRL_MASK); 
    m27.setAccelerator(keyrepl); 
    m271=new JMenuItem("替换下一个");
    m271.setEnabled(false);
    m271.addActionListener(this);
    KeyStroke keyrepn=KeyStroke.getKeyStroke(KeyEvent.VK_F6,0); 
    m271.setAccelerator(keyrepn); 
    JMenuItem m28=new JMenuItem("全选 ");
    m28.addActionListener(this);
    KeyStroke keyall=KeyStroke.getKeyStroke(KeyEvent.VK_A,Event.CTRL_MASK); 
    m28.setAccelerator(keyall); 
    JMenuItem m29=new JMenuItem("日期/时间 ");
    m29.addActionListener(this);

    m3=new JMenu("格式(O)");
    m3.setMnemonic('O');
    JMenu m31=new JMenu("字体样式 ");
    JMenuItem m311=new JMenuItem("正常 ");  
    m311.addActionListener(this);
    JMenuItem m312=new JMenuItem("粗体 ");
    m312.addActionListener(this);
    JMenuItem m313=new JMenuItem("斜体 ");
    m313.addActionListener(this);
    JMenu m32=new JMenu("字体大小 ");
    JMenuItem m321=new JMenuItem("最大 ");
    m321.addActionListener(this);
    JMenuItem m322=new JMenuItem("较大 ");
    m322.addActionListener(this);
    JMenuItem m323=new JMenuItem("适中 ");
    m323.addActionListener(this);
    JMenuItem m324=new JMenuItem("较小 ");
    m324.addActionListener(this);
    JMenuItem m325=new JMenuItem("最小 ");
    m325.addActionListener(this);
    JMenuItem m33=new JMenuItem("字体颜色 ");
    m33.addActionListener(this);
  
    m6=new JMenu("帮助(H)");
    m6.setMnemonic('H'); 
    m62=new JMenuItem("关于 ");
    m62.addActionListener(this);

    m1.add(m10); m1.add(m11); m1.add(m12); m1.add(m13); m1.addSeparator(); m1.add(m14);
    m2.add(m22); m2.add(m21); m2.add(m23); m2.add(m24); m2.addSeparator(); m2.add(m25);
    m2.add(m26); m2.add(m27); m2.add(m271); m2.addSeparator(); m2.add(m28);
    m2.add(m29); m3.add(m31); m31.add(m311); m31.add(m312); m31.add(m313);
    m3.add(m32); m32.add(m321); m32.add(m322); m32.add(m323); m32.add(m324); 
    m32.add(m325); m3.add(m33); m6.add(m62); mb.add(m1); mb.add(m2); mb.add(m3); mb.add(m6); 
    this.setJMenuBar(mb); 
    setVisible(true);
    pack();
    show();
    this.addWindowListener(new L123(this));
    }
    
    public void actionPerformed(ActionEvent p)
   {
     if(p.getActionCommand()=="新建 ") 
    { 
    fname=null; 
    txt1.setText("");
        }

    if(p.getActionCommand()=="打开...")
    {
    try {
    if(this.choose.APPROVE_OPTION==this.choose.showOpenDialog(this)) 
    { 
    path=this.choose.getSelectedFile().getPath(); 
    fname=this.choose.getSelectedFile().getName();
    File file=new File(path);
    int flength=(int)file.length(); 
    FileReader fReader=new FileReader(file); 
    char[] data=new char[flength]; 
    fReader.read(data,0,flength); 
    txt1.setText(new String(data)); 
    txt1.setCaretPosition(0);
    }
   }
    catch(IOException e)
    {} 
    }


    if(p.getActionCommand()=="保存 ")
    {
    if(fname==null) 
    { othersave(); }
     try {
    File savefile=new File(path);
    savefile.createNewFile(); 
    FileWriter fw=new FileWriter(savefile); 
    fw.write(txt1.getText()); 
    fw.close(); 
    }
    catch(IOException e) 
    {}
    }

    if(p.getActionCommand()=="另存为...")
    {othersave();}
    if(p.getActionCommand()=="退出 ")
    {exit();}
    
    if(p.getActionCommand()=="复制 ")
    { txt1.copy(); }
    if(p.getActionCommand()=="剪切 ")
    { txt1.cut(); }
    if(p.getActionCommand()=="粘贴 ")
    { txt1.paste(); }
    if(p.getActionCommand()=="删除 ")
    { 
    txt1.replaceSelection("");
    }

    if(p.getActionCommand()=="查找 ") 
    {find=new Dialog(this,"查找");
    JPanel p1=new JPanel();
    JPanel p2=new JPanel();
    findtxt=new JTextField(7);
    p1.add(new JLabel("输入要查找字符:"));
    p1.add(findtxt);
    p2.add(findenter);
    find.add("Center",p1);
    find.add("South",p2);
    find.setSize(200,100);
    find.show(); 
    }
    if(p.getSource()==findenter) 
    {
    if(findtxt.getText().equals("")) 
    {find.dispose();}
    else if(!findtxt.getText().equals(""))
    { find.dispose();
    str=txt1.getText();
    startp=str.indexOf(findtxt.getText());
    endp=startp+findtxt.getText().length();
    txt1.select(startp,endp);
    m26.setEnabled(true);
    newendp=endp;
    notfindmethod();
    }
   }
    
    if(p.getActionCommand()=="查找下一个 ")
    {
    nexttemp=newendp; 
    String strall=txt1.getText();
    txt1.select(nexttemp,strall.length()); 
    strnext=txt1.getSelectedText();
    newstartp=strnext.indexOf(findtxt.getText())+nexttemp;
    newendp=newstartp+findtxt.getText().length();
    txt1.select(newstartp,newendp); 
    notfindmethod();
     }
    if(p.getActionCommand()=="替换 ")
    {m271.setEnabled(true);
    replace=new Dialog(this,"替换");
    JPanel p1=new JPanel();
    JPanel p2=new JPanel();
    JPanel p3=new JPanel();
    findtxt=new JTextField(7);
    repltxt=new JTextField(7);
    p1.add(new JLabel("输入原始字符:"));
    p1.add(findtxt);
    p2.add(new JLabel("输入替换字符:")); 
    p2.add(repltxt);
    p3.add(replb);
    replace.add("North",p1);
    replace.add("Center",p2);
    replace.add("South",p3);
    replace.setSize(200,150);
    replace.show();
    }
    if(p.getSource()==replb) 
    {
    replace.dispose();
    str=txt1.getText();
    startp=str.indexOf(findtxt.getText());
    endp=startp+findtxt.getText().length();
    txt1.replaceRange(repltxt.getText(),startp,endp);
    newendp=endp; 
    }
    if(p.getActionCommand()=="替换下一个")
    {nexttemp=newendp; 
    String strall=txt1.getText();
    txt1.select(nexttemp,strall.length());
    strnext=txt1.getSelectedText();
    newstartp=strnext.indexOf(findtxt.getText())+nexttemp;
    newendp=newstartp+findtxt.getText().length();
    txt1.select(newstartp,newendp); 
    notfindmethod();
    txt1.replaceRange(repltxt.getText(),newstartp,newendp);
    }
    if(p.getActionCommand()=="全选 ")
    {txt1.selectAll(); } 
    if(p.getActionCommand()=="日期/时间 ") 
    { int inpoint=txt1.getCaretPosition();
    Date dt=new Date();
    String strdate=dt.toLocaleString();
    txt1.insert(strdate,inpoint);}
   
    if(p.getActionCommand()=="正常 ")
    { newfont=txt1.getFont(); 
    int size=newfont.getSize();
    txt1.setFont(new Font("宋体",Font.PLAIN,size)); }
    if(p.getActionCommand()=="粗体 ")
    { newfont=txt1.getFont();
    int size=newfont.getSize();
    txt1.setFont(new Font("宋体",Font.BOLD,size));  }    
    if(p.getActionCommand()=="斜体 ")
    { newfont=txt1.getFont();
    int size=newfont.getSize();
    txt1.setFont(new Font("宋体",Font.ITALIC,size)); }

   
    if(p.getActionCommand()=="最大 ")
    { newfont=txt1.getFont(); 
    int sty=newfont.getStyle() ; 
    txt1.setFont(new Font("宋体",sty,35)); }
    if(p.getActionCommand()=="较大 ")
    { newfont=txt1.getFont(); 
    int sty=newfont.getStyle() ;
    txt1.setFont(new Font("宋体",sty,30)); }
    if(p.getActionCommand()=="适中 ")
    { newfont=txt1.getFont();
    int sty=newfont.getStyle() ;
    txt1.setFont(new Font("宋体",sty,18)); }
    if(p.getActionCommand()=="较小 ")
    { newfont=txt1.getFont();
    int sty=newfont.getStyle() ;
    txt1.setFont(new Font("宋体",sty,16)); }
    if(p.getActionCommand()=="最小 ")
    { newfont=txt1.getFont();
    int sty=newfont.getStyle() ;
    txt1.setFont(new Font("宋体",sty,14)); }

    if(p.getActionCommand()=="字体颜色 ") 
    {
    JColorChooser jColor=new JColorChooser(); 
    Color fcolor=txt1.getForeground(); 
    txt1.setForeground( jColor.showDialog(txt1,"选择字体颜色",fcolor)); 
    }

   
     if(p.getActionCommand()=="关于 ")
   { 
    JLabel prompt=new JLabel("author:Wang Runlan ",JLabel.CENTER);
    JOptionPane.showMessageDialog(null,prompt,"我的记事本",JOptionPane.INFORMATION_MESSAGE);
     }
     }

    public void othersave() 
     {
     if(choose.APPROVE_OPTION==choose.showSaveDialog(this))
    {  
    path=choose.getSelectedFile().getPath(); 
    newfiles=new File(path);

    fname=choose.getSelectedFile().getName();;
    try {
    newfiles=new File(path);
    newfiles.createNewFile();
    FileWriter fw=new FileWriter(newfiles); 
    fw.write(txt1.getText()); 
    fw.close(); 
    }catch(IOException e)
    {}
    }
    }

    public void notfindmethod() 
     {
    if(!txt1.getSelectedText().equals(findtxt.getText())) 
    { txt1.setCaretPosition(0); 
    JOptionPane.showMessageDialog(null,"查找不到对应的字符！","查找错误",JOptionPane.ERROR_MESSAGE);
    m26.setEnabled(false); }
     }

    public void exit()
    { int value;
    String[] qq={"确定", "取消"};
    value=JOptionPane.showOptionDialog(null, "确定退出吗？请注意保存文件！", "退出程序？", 
    JOptionPane.DEFAULT_OPTION, JOptionPane.QUESTION_MESSAGE,
    null, qq, qq[0]);
    if(value==JOptionPane.YES_OPTION)
    System.exit(0);
    else if(value==JOptionPane.NO_OPTION) 
    { return; }

    }
     }

    class myhelp extends JFrame
    {
           }

    class L123 extends WindowAdapter 
    {note fx;
    L123(note fxx)
    {fx=fxx;}
    public void windowClosing(WindowEvent e) 
    { 
    System.exit(0); 
    }
    }

    class L123help extends WindowAdapter 
    {myhelp fx;
    L123help(myhelp fxx)
    {fx=fxx;}
    public void windowClosing(WindowEvent e)
    {
    fx.dispose();
    }
    }

    class handlemouse extends MouseAdapter 
 
    {
    note fx; 
    handlemouse(note fxx)
    {fx=fxx;}
    public void mouseReleased(MouseEvent n)
    {
    if(n.isPopupTrigger())
    fx.popm.show((Component)n.getSource(),n.getX(),n.getY());
     }

   }