📄 notepad.java
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if(sourceStr.equals(""))
{
jta.setText(textTemp.toUpperCase());
}
else
{
sourceStr = sourceStr.toUpperCase();
textTemp = textTemp.substring(0, selectStart) +
sourceStr + textTemp.substring(selectEnd);
jta.setText(textTemp);
}
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popToUpItem,
ex.toString() + ":\n输入有误!", "出错啦!",
JOptionPane.INFORMATION_MESSAGE);
}
}
});
//转换为小写弹出菜单项
popToLowItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String textTemp = jta.getText();
int selectStart = jta.getSelectionStart();
int selectEnd = jta.getSelectionEnd();
String sourceStr = textTemp.substring(selectStart, selectEnd);
try
{
if(sourceStr.equals(""))
{
jta.setText(textTemp.toLowerCase());
}
else
{
sourceStr = sourceStr.toLowerCase();
textTemp = textTemp.substring(0, selectStart) +
sourceStr + textTemp.substring(selectEnd);
jta.setText(textTemp);
}
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popToLowItem,
ex.toString() + ":\n输入有误!", "出错啦!",
JOptionPane.INFORMATION_MESSAGE);
}
}
});
//大小写互换弹出菜单项
popUpLowItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String textTemp = jta.getText();
StringBuffer temp = new StringBuffer();
int selectStart = jta.getSelectionStart();
int selectEnd = jta.getSelectionEnd();
final int LEN = 10;
int loop = 0;
int last = 0;
int length = 0;
String sourceStr = textTemp.substring(selectStart, selectEnd);
try
{
if(sourceStr.equals(""))
{
length = textTemp.length();
loop = length / LEN;
last = length % LEN;
for(int i = 1; i <= loop; i++)
{
sourceStr = textTemp.substring((i-1)*LEN, i*LEN);
sourceStr = Notepad.this.upLowSwitch(sourceStr, LEN);
temp = temp.append(sourceStr);
}
sourceStr = textTemp.substring(loop * LEN);
sourceStr = Notepad.this.upLowSwitch(sourceStr, last);
temp = temp.append(sourceStr);
temp = temp.append(sourceStr);
jta.setText(temp.toString());
}
else
{
String sourceTemp = new String(sourceStr);
length = sourceStr.length();
loop = length / LEN;
last = length % LEN;
for(int i = 1; i <= loop; i++)
{
sourceStr = sourceTemp.substring((i-1)*LEN, i*LEN);
sourceStr = Notepad.this.upLowSwitch(sourceStr, LEN);
temp = temp.append(sourceStr);
}
sourceStr = sourceTemp.substring(loop * LEN);
sourceStr = Notepad.this.upLowSwitch(sourceStr, last);
temp = temp.append(sourceStr);
temp = new StringBuffer(textTemp.substring(0, selectStart)).append(
temp).append(textTemp.substring(selectEnd));
jta.setText(temp.toString());
}
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popUpLowItem,
ex.toString() + ":\n输入有误!", "出错啦!",
JOptionPane.INFORMATION_MESSAGE);
}
}
});
//定位弹出才当项
popPosItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
try
{
int start0 = 0;
String textTemp = jta.getText();
int index = Integer.parseInt(JOptionPane.showInputDialog(popPosItem,
"定位到行数:", "定位到行", JOptionPane.PLAIN_MESSAGE));
for(int i = 1; i < index; i++)
{
start0 = textTemp.indexOf("\n", start0) + 1;
if(start0 == 0)
throw new Exception("行数越界：");
}
jta.select(start0, textTemp.indexOf("\n", start0));
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popPosItem,
ex.toString() + ":\n输入有误!", "出错啦!",
JOptionPane.INFORMATION_MESSAGE);
}
}
});
//保存文件弹出菜单项
popSaveItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String str = jta.getText();
BufferedWriter bw = null;
if((fileName == null) || (fileDir == null))
{
FileDialog fdg = new FileDialog(Notepad.this, "保存", FileDialog.SAVE);
fdg.setVisible(true);
fileDir = fdg.getDirectory();
fileName = fdg.getFile();
try
{
bw = new BufferedWriter(new FileWriter(new File(fileDir, fileName)));
bw.write(str);
bw.close();
Notepad.this.setTitle("CoffeeEditor " + "[" +
fileDir + fileName + "]");
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popSaveItem,
ex.toString() + ":\n写入文件出错!",
"出错啦!", JOptionPane.INFORMATION_MESSAGE);
}
}
else
{
try
{
bw = new BufferedWriter(new FileWriter(new File(fileDir, fileName)));
bw.write(str);
bw.close();
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popSaveItem,
ex.toString() + ":\n写入文件出错!",
"出错啦!", JOptionPane.INFORMATION_MESSAGE);
}
}
}
});
//打开文件弹出菜单项
popOpenItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
FileDialog fdg = new FileDialog(Notepad.this, "打开", FileDialog.LOAD);
FileDialog fdgSave = new FileDialog(Notepad.this, "保存", FileDialog.SAVE);
BufferedWriter bw = null;
StringBuffer textStrb = new StringBuffer();
BufferedReader br = null;
String str = jta.getText();
if(!str.equals(lastContent))
{
int message = JOptionPane.showConfirmDialog(popOpenItem,
"是否保存文件?","保存",
JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE);
if(message == 0)
{
if((fileName == null) || (fileDir == null))
{
fdgSave.setVisible(true);
fileDir = fdgSave.getDirectory();
fileName = fdgSave.getFile();
try
{
bw = new BufferedWriter(new FileWriter(new File(fileDir, fileName)));
bw.write(str);
bw.close();
Notepad.this.setTitle("CoffeeEditor " + "[" +
fileDir + fileName + "]");
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popOpenItem,
ex.toString() + ":\n写入文件出错!",
"出错啦!", JOptionPane.INFORMATION_MESSAGE);
Notepad.this.setTitle("CoffeeEditor " + "[" +
fileDir + fileName + "]");
}
}
else
{
try
{
bw = new BufferedWriter(new FileWriter(new File(fileDir, fileName)));
bw.write(str);
bw.close();
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popOpenItem,
ex.toString() + ":\n写入文件出错!",
"出错啦!", JOptionPane.INFORMATION_MESSAGE);
}
}
}
else if(message == 2)//重新回到编辑窗口
{
return;
}
}
try
{
fdg.setVisible(true);
fileDir = fdg.getDirectory();
fileName = fdg.getFile();
br = new BufferedReader(new FileReader(new File(fileDir, fileName)));
jta.setText("");
while((str = br.readLine()) != null)
{
textStrb = textStrb.append(str).append("\n");
}
jta.setText(textStrb.toString());
lastContent = jta.getText();
br.close();
Notepad.this.setTitle("CoffeeEditor " + "[" +
fileDir + fileName + "]");
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popOpenItem,
ex.toString() + ":\n读取文件出错!",
"出错啦!", JOptionPane.INFORMATION_MESSAGE);
}
}
});
//新建文件弹出菜单项
popNewItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
FileDialog fdgNew = new FileDialog(Notepad.this, "新建", FileDialog.SAVE);
FileDialog fdg = new FileDialog(Notepad.this, "保存", FileDialog.SAVE);
String str = jta.getText();
BufferedWriter bw = null;
if(!str.equals(lastContent))
{
int message = JOptionPane.showConfirmDialog(popNewItem,
"是否保存文件?","保存",
JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE);
if(message == 0)
{
if((fileName == null) || (fileDir == null))
{
fdg.setVisible(true);
fileDir = fdg.getDirectory();
fileName = fdg.getFile();
try
{
bw = new BufferedWriter(new FileWriter(new File(fileDir, fileName)));
bw.write(str);
bw.close();
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popNewItem,
ex.toString() + ":\n写入文件出错!",
"出错啦!", JOptionPane.INFORMATION_MESSAGE);
}
}
else
{
try
{
bw = new BufferedWriter(new FileWriter(new File(fileDir, fileName)));
bw.write(str);
bw.close();
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popNewItem,
ex.toString() + ":\n写入文件出错!",
"出错啦!", JOptionPane.INFORMATION_MESSAGE);
}
}
}
else if(message == 2)//重新回到编辑窗口
{
return;
}
}
//创建新文件
fdgNew.setVisible(true);
fileDir = fdgNew.getDirectory();
fileName = fdgNew.getFile();
try
{
bw = new BufferedWriter(new FileWriter(new File(fileDir, fileName)));
jta.setText("");
bw.close();
Notepad.this.setTitle("CoffeeEditor " + "[" +
fileDir + fileName + "]");
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(popNewItem,
ex.toString() + ":\n新建文件出错!",
"出错啦!", JOptionPane.INFORMATION_MESSAGE);
}
}
});
//编辑区获取弹出菜单
jta.addMouseListener(new MouseAdapter()
{
public void mouseReleased(MouseEvent e)
{
if((e.getButton() == MouseEvent.BUTTON3) && e.isPopupTrigger())
{
popMenu.show(e.getComponent(), e.getX(), e.getY());
}
}
});
//控制台获取弹出菜单
csta.addMouseListener(new MouseAdapter()
{
public void mouseReleased(MouseEvent e)
{
if((e.getButton() == MouseEvent.BUTTON3) && e.isPopupTrigger())
{
conPopMenu.show(e.getComponent(), e.getX(), e.getY());
}
}
});
//清屏弹出菜单项
clsItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
csta.setText("");
}
});
//控制台保存
fileItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
String conContent = csta.getText();
if(conContent.equals(""))
{
JOptionPane.showMessageDialog(fileItem,
"没有要保存的内容!", "提示", JOptionPane.INFORMATION_MESSAGE);
}
else
{
FileDialog fdg = new FileDialog(Notepad.this, "保存", FileDialog.SAVE);
fdg.setVisible(true);
String dir = fdg.getDirectory();
String file = fdg.getFile();
try
{
BufferedWriter bw = new BufferedWriter(new FileWriter(new File(dir, file)));
bw.write(csta.getText());
bw.close();
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(Notepad.this,
ex.toString() + ":\n写入文件出错!",
"出错啦!", JOptionPane.INFORMATION_MESSAGE);
System.exit(0);
}
}
}
});
popMenu.add(popCopyItem);
popMenu.add(popPasteItem);
popMenu.add(popCutItem);
popMenu.add(popDelItem);
popChangeMenu.add(popToLowItem);
popChangeMenu.add(popToUpItem);
popChangeMenu.add(popUpLowItem);
popMenu.add(popChangeMenu);
popMenu.add(popSelectItem);
popMenu.add(popFindItem);
popMenu.add(popPosItem);
popSubMenu.add(popSubSingleItem);
popSubMenu.add(popSubWholeItem);
popMenu.add(popSubMenu);
popMenu.add(popSaveItem);
popMenu.add(popOpenItem);
popMenu.add(popNewItem);
conPopMenu.add(fileItem);
conPopMenu.add(clsItem);
JScrollPane jScrollPane1 = new JScrollPane();
JScrollPane jScrollPane2 = new JScrollPane();
jScrollPane1.getViewport().add(jta, null);
jScrollPane2.getViewport().add(csta, null);
JSplitPane jsp = new JSplitPane(JSplitPane.VERTICAL_SPLIT, jScrollPane1, jScrollPane2);
contentPane.add(popMenu);
contentPane.add(conPopMenu);
setJMenuBar(menuBar);
contentPane.add(jsp);
}
//启动程序
public static void main(String[] args)
{
Notepad notepad = new Notepad();
notepad.setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
notepad.setVisible(true);
}
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