mainsystem.java

Java记事本源文件 分享！ 实现简易功能

      startindex = a + b; 
      if(a == -1) { 
       JOptionPane.showMessageDialog(null, "没有你要查找的信息", "查找结果", 1); 
       a = 0; 
       startindex = 0; 
      } 
      textarea.select(a, startindex); 
     } 
    } 
   }); 
   
   cbutton.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     if(!(textarea.getText().equals(""))) { 
      String replacestr = cfield.getText(); 
      textarea.replaceSelection(replacestr); 
     } 
     else { 
      JOptionPane jop=new JOptionPane(null,JOptionPane.INFORMATION_MESSAGE); 
      jop.showMessageDialog(jd,"记事本为空,无法替换","警告",JOptionPane.OK_OPTION); 
     } 
    } 
   }); 
   
   cabutton.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     if(!(textarea.getText().equals(""))) { 
      while(a > -1) { 
       String textstr = textarea.getText(); 
       String searchstr = sfield.getText(); 
       a = textstr.indexOf(searchstr, startindex); 
       if(a == -1) 
        break; 
       b = searchstr.length(); 
       startindex = a + b; 
       textarea.select(a, startindex); 
       textarea.replaceSelection(cfield.getText()); 
       startindex = a + b; 
      } 
      JOptionPane.showMessageDialog(null, "全部替换完毕", "替换", 1); 
      a = 0; 
      startindex = 0; 
     } 
     else { 
      JOptionPane jop=new JOptionPane(null,JOptionPane.INFORMATION_MESSAGE); 
      jop.showMessageDialog(jd,"记事本为空,无法替换","警告",JOptionPane.OK_OPTION); 
     } 
    } 
   }); 
   
   cancel.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     jd.dispose(); 
    } 
   }); 
   jd.setVisible(true); 
  } 
   
   
  if(evt.getActionCommand().equals("全选")) { 
   textarea.selectAll(); 
  } 
   
   
  if(evt.getActionCommand().equals("时间/日期")) { 
   final JDialog jd = new JDialog(this, "插入日期"); 
   Container pane = jd.getContentPane(); 
   pane.setLayout(new GridLayout(2, 1)); 
   jd.setSize(370, 100); 
   jd.setLocation(200, 300); 
   JPanel panel1 = new JPanel(); 
   JPanel panel2 = new JPanel(); 
   panel1.setLayout(new FlowLayout()); 
   panel2.setLayout(new GridLayout(1, 3, 5, 5)); 
   JLabel label = new JLabel("插入内容:"); 
   final JTextField sfield = new JTextField(20); 
   sfield.setEditable(false); 
   JButton insert = new JButton("确定"); 
   ButtonGroup group = new ButtonGroup(); 
   final JRadioButton j1 = new JRadioButton("格式一", true); 
   final JRadioButton j2 = new JRadioButton("格式二"); 
   final JRadioButton j3 = new JRadioButton("格式三"); 
   group.add(j1); 
   group.add(j2); 
   group.add(j3); 
      GregorianCalendar day = new GregorianCalendar(); 
      final String time1 = day.getTime().toString(); 
      sfield.setText(time1); 
      Calendar cal = Calendar.getInstance(); 
      Formatter fmt1 = new Formatter(); 
      fmt1.format("%tc", cal); 
      final String time2 = fmt1.toString(); 
      Formatter fmt2 = new Formatter(); 
      fmt2.format("%tF %tT", cal, cal); 
      final String time3 = fmt2.toString(); 
      panel1.add(label); 
   panel1.add(sfield); 
   panel1.add(insert); 
   panel2.add(j1); 
   panel2.add(j2); 
   panel2.add(j3); 
   pane.add(panel1); 
   pane.add(panel2); 
   jd.setVisible(true); 
   
   j1.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     sfield.setText(time1); 
    } 
   }); 
   
   j2.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     sfield.setText(time2); 
    } 
   }); 
   
   j3.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     sfield.setText(time3); 
    } 
   }); 
   
   insert.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     String ss = sfield.getText(); 
     int position = textarea.getCaretPosition(); 
     textarea.insert(ss, position); 
     jd.dispose(); 
    } 
   }); 
  } 
   
  if(evt.getActionCommand().equals("自动换行")) { 
   if(jcbmi.getState()) { 
    textarea.setLineWrap(true); 
    textarea.setWrapStyleWord(true); 
   } 
   else { 
    textarea.setLineWrap(false); 
    textarea.setWrapStyleWord(false); 
   } 
  } 
   
   
  if(evt.getActionCommand().equals("字体")) { 
   final JDialog fontdialog = new JDialog(this, "设置字体"); 
   Container pane = fontdialog.getContentPane(); 
   pane.setLayout(new GridLayout(3, 1)); 
   fontdialog.setSize(210, 220); 
   fontdialog.setLocation(200, 300); 
   
   JPanel panel1 = new JPanel(); 
   JLabel label1 = new JLabel("字型", JLabel.RIGHT); 
   JLabel label2 = new JLabel("大小", JLabel.LEFT); 
   final JComboBox jb1 = new JComboBox(); 
   final JComboBox jb2 = new JComboBox(); 
   jb1.addItem("常规"); 
   jb1.addItem("粗体"); 
   jb1.addItem("斜体"); 
   jb1.addItem("粗斜体"); 
   jb2.addItem("12"); 
   jb2.addItem("8"); 
   jb2.addItem("16"); 
   jb2.addItem("20"); 
   jb2.addItem("30"); 
   jb2.addItem("40"); 
   panel1.add(label1); 
   panel1.add(jb1); 
   panel1.add(label2); 
   panel1.add(jb2); 
   
   JPanel panel2 = new JPanel(); 
   JButton ok = new JButton("确定"); 
   JButton cancel = new JButton("取消"); 
   panel2.add(ok); 
   panel2.add(cancel); 
   
   JPanel panel3 = new JPanel(); 
   panel3.setLayout(new BorderLayout()); 
   JLabel label3 = new JLabel("预览:"); 
   String showstr = "晓春记事本"; 
   final JTextArea showfield = new JTextArea(showstr); 
   showfield.setEditable(false); 
   panel3.add(label3, BorderLayout.WEST); 
   panel3.add(showfield, BorderLayout.CENTER); 
   pane.add(panel1); 
   pane.add(panel2); 
   pane.add(panel3); 
   
   fontdialog.setVisible(true); 
   
   jb1.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     if(jb1.getSelectedItem().equals("常规")) { 
      int fontsize = Integer.parseInt((String) jb2.getSelectedItem()); 
      Font f = new Font("Dialog", Font.PLAIN, fontsize); 
      showfield.setFont(f); 
     } 
     if(jb1.getSelectedItem().equals("粗体")) { 
      int fontsize = Integer.parseInt((String) jb2.getSelectedItem()); 
      Font f = new Font("Dialog", Font.BOLD, fontsize); 
      showfield.setFont(f); 
     } 
     if(jb1.getSelectedItem().equals("斜体")) { 
      int fontsize = Integer.parseInt((String) jb2.getSelectedItem()); 
      Font f = new Font("Dialog", Font.ITALIC, fontsize); 
      showfield.setFont(f); 
     } 
     if(jb1.getSelectedItem().equals("粗斜体")) { 
      int fontsize = Integer.parseInt((String) jb2.getSelectedItem()); 
      Font f = new Font("Dialog", Font.BOLD + Font.ITALIC, fontsize); 
      showfield.setFont(f); 
     } 
    } 
   }); 
   
   jb2.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     if(jb2.getSelectedItem().equals("12")) { 
                        Font a = showfield.getFont(); 
                        int style = a.getStyle(); 
      Font f = new Font("Dialog", style, 12); 
      showfield.setFont(f); 
     } 
     if(jb2.getSelectedItem().equals("8")) { 
      Font a = showfield.getFont(); 
      int style = a.getStyle(); 
      Font f = new Font("Dialog", style, 8); 
      showfield.setFont(f); 
     } 
     if(jb2.getSelectedItem().equals("16")) { 
      Font a = showfield.getFont(); 
      int style = a.getStyle(); 
      Font f = new Font("Dialog", style, 16); 
      showfield.setFont(f); 
     } 
     if(jb2.getSelectedItem().equals("20")) { 
      Font a = showfield.getFont(); 
      int style = a.getStyle(); 
      Font f = new Font("Dialog", style, 20); 
      showfield.setFont(f); 
     } 
     if(jb2.getSelectedItem().equals("30")) { 
      Font a = showfield.getFont(); 
      int style = a.getStyle(); 
      Font f = new Font("Dialog", style, 30); 
      showfield.setFont(f); 
     } 
     if(jb2.getSelectedItem().equals("40")) { 
      Font a = showfield.getFont(); 
      int style = a.getStyle(); 
      Font f = new Font("Dialog", style, 40); 
      showfield.setFont(f); 
     } 
    } 
   }); 
   
   ok.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     Font a = showfield.getFont(); 
     int style = a.getStyle(); 
     int size = Integer.parseInt((String) jb2.getSelectedItem()); 
     Font f = new Font("Dialog", style, size); 
     textarea.setFont(f); 
     fontdialog.dispose(); 
    } 
   }); 
   
   cancel.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
     fontdialog.dispose(); 
    } 
   }); 
  } 
   
  if(evt.getActionCommand().equals("关于记事本")) { 
   JOptionPane jop=new JOptionPane(null,JOptionPane.INFORMATION_MESSAGE); 
   jop.showMessageDialog(this,"  晓春记事本 2008-05-7","关于记事本",JOptionPane.OK_OPTION); 
  } 
   
} 

class UndoHander implements UndoableEditListener { 
  public void undoableEditHappened(UndoableEditEvent eundo) { 
   undo.addEdit(eundo.getEdit()); 
  } 
} 

public static void main(String[] args) { 
  new MainSystem(); 
  System.gc(); 
} 
}