java大作业记事本

功能：

1. 保存另存为
2. 打开
3. 配置邮箱软件路径
4. 打开邮箱并将用户输入内容复制
5. 查找
6. 替换
7. 运行前时检测有没有配置的文件，如果没有则自动弹出配置路径窗口

代码部分

点击查看代码

package notepad;

import javax.swing.*;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.ArrayList;

public class notepadMain extends JFrame {
	// 建立一个窗体
	JFrame mainWindow;
	// 建立菜单栏
	JMenuBar menuBar;
	/*
	 * file 文件 edit 编辑 help 帮助 version 查看 format 格式
	 */
	JMenu file, edit, help, version, foramt, sendTo;
	JMenuItem openFile, cut, save, saveAs, copy, stick, sendEmail, find, about, peizhi,replace,all;
	JTextArea input;
	JPanel textPanel;
	ArrayList<String> gettedList;
	// 你所要查找的文本的位置
	int position;

//----------------------------------------------------------------------    
	// 下面是创建配置邮箱软件打开路径窗口的组件
	JFrame pzfm;
	JPanel pzpanel1, pzpanel2, pzpanel3;
	JTextField pzjtf;
	JButton pzbut;
	JLabel pzlabel;
	// 存储邮箱路径
	String address;
	File pzfile;
	FileWriter pzfwriter;

	// ------------------------------
	// 获取邮箱地址路径
	String getedAddress;
	File getfile;
	FileReader getfread;
	// -------------------------------
	// 替换
	JLabel label1;
	JTextField fiel, fiel2;
	JButton but1;
	int index;

	// ---------------------------------
//构造方法
	notepadMain() {
		mainWindow = new JFrame("记事本");
		mainWindow.setBounds(0, 0, 900, 700);
		mainWindow.setLocationRelativeTo(null);
		getEmailAddress();
		setMenuBar();
		setPanel();
		listener();
//        getEmailAddress();
		mainWindow.setVisible(true);
		mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	}

	// 设置menuBar
	public void setMenuBar() {
		menuBar = new JMenuBar();
		file = new JMenu("文件");
		edit = new JMenu("编辑");
		help = new JMenu("帮助");
		sendTo = new JMenu("发送");
		version = new JMenu("查看");
		foramt = new JMenu("配置");
		openFile = new JMenuItem("打开");
		cut = new JMenuItem("剪切");
		save = new JMenuItem("保存");
		saveAs = new JMenuItem("另存为");
		stick = new JMenuItem("粘贴");
		copy = new JMenuItem("复制");
		peizhi = new JMenuItem("配置邮件路径");
		sendEmail = new JMenuItem("复制全文并打开邮箱");
		find = new JMenuItem("查找");
		replace=new JMenuItem("替换");
		about = new JMenuItem("关于");
		all=new JMenuItem("全选");
		menuBar.add(file);
		menuBar.add(edit);
		menuBar.add(foramt);
		menuBar.add(version);
		menuBar.add(sendTo);
		menuBar.add(help);
		file.add(openFile);
		file.add(save);
		file.add(saveAs);
		edit.add(cut);
		edit.add(copy);
		edit.add(stick);
		edit.add(all);
		foramt.add(peizhi);
		sendTo.add(sendEmail);
		version.add(find);
		version.add(replace);
		help.add(about);
		// 添加menuItem在此
		mainWindow.setJMenuBar(menuBar);
	}

//设置menu的监听
	void listener() {
		openFile.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				openFile();
			}
		});
		save.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				saveFile();
			}
		});
		saveAs.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				saveOther();
			}
		});
		cut.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				input.cut();
			}
		});
		copy.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				input.copy();
			}
		});
		stick.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				input.paste();
			}
		});
		all.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				input.selectAll();
			}
		});
		find.addActionListener(new ActionListener() {
			/*
			 * 实现查找 将文本呢域中的内容通过Tihuan类的构造方法传入Tihuan类中，
			 */
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				// 获取列数
				// 获取文本域内输入的内容
//				String youInput=input.getText();  
//				gettedList=new ArrayList<String>();

//				Tihuan find=new Tihuan(youInput);   t
				// --------------------------------------------------
//				setFrame();
//				addListen(youInput);
				findT();
			}
		});
		replace.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				replaceT();
			}
		});
		sendEmail.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				input.selectAll();
				input.copy();
				Runtime rt = Runtime.getRuntime();
				try {
					rt.exec(getedAddress);
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}
		});
		peizhi.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				setPzWindow();

			}
		});
		about.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				JOptionPane.showMessageDialog(null, "20202417111韩佳成");
			}
		});
	}

//创建一个窗体，专门用于配置记事本打开邮箱的路径
	void setPzWindow() {
		pzfm = new JFrame();
		pzfm.setTitle("配置邮箱路径");
		pzpanel1 = new JPanel();
		pzpanel2 = new JPanel();
		pzpanel3 = new JPanel();
		pzbut = new JButton("确定");
		pzjtf = new JTextField(30);
		pzlabel = new JLabel("邮箱路径：");
		pzfm.setSize(450, 120);
		pzfm.setLocation(1000, 400);
		pzfm.setResizable(false);
		pzpanel1.add(pzlabel);
		pzpanel1.add(pzjtf);
		pzpanel1.add(pzbut);
		pzfm.add(pzpanel1);
//    	pzfm.add(pzpanel2);
		pzfm.setVisible(true);
		// 绑定配置窗口中的确定按钮
		pzbut.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
//				pzfile.delete();
				setEmailFileAddress();
				// 点击确定后关闭窗口
				pzfm.setVisible(false);
			}
		});
	}

//创建一个文件，，文件内存储需要打开的软件的路径
	public void setEmailFileAddress() {
		address = pzjtf.getText();
		pzfile = new File("d://Emailaddress.txt");
		try {
			pzfile.createNewFile();
		} catch (IOException e1) {
			// TODO 自动生成的 catch 块
			JOptionPane.showMessageDialog(null, "创建文件失败");
			e1.printStackTrace();
		}
		try {
			pzfwriter = new FileWriter(pzfile, true);
			pzfwriter.write("");
			pzfwriter.flush();
		} catch (IOException e) {
			// TODO 自动生成的 catch 块
			JOptionPane.showMessageDialog(null, "创建失败");
			e.printStackTrace();
		}
		try {
//			pzfwriter.write(address);
			BufferedWriter out = new BufferedWriter(pzfwriter);
			out.write(address);
			out.flush();
			out.close();
		} catch (IOException e) {
			// TODO 自动生成的 catch 块
			JOptionPane.showMessageDialog(null, "写入异常");
			e.printStackTrace();
		}

	}

//读取邮件地址
	public void getEmailAddress() {
		int n;
		byte[] a = new byte[1000];
		getfile = new File("d://Emailaddress.txt");
		try {
			FileInputStream in = new FileInputStream(getfile);
			while ((n = in.read(a, 0, 1000)) != -1) {
				String s = new String(a, 0, n);
				getedAddress = s;
				System.out.println(getedAddress);
			}
		} catch (IOException e) {
			// TODO 自动生成的 catch 块
			setPzWindow();
//			e.printStackTrace();
		}

	}

//    设置输入的面板
	public void setPanel() {
		textPanel = new JPanel();
		input = new JTextArea();
		input.setFont(new Font("微软雅黑", Font.BOLD, 30));
		input.setLineWrap(true);
		JScrollPane scrollPane = new JScrollPane(input);
		mainWindow.add(scrollPane);
	}

//打开功能的实现
	void openFile() {

		FileDialog fd = new FileDialog(notepadMain.this, "打开", FileDialog.LOAD);
		// 在这里我想限制打开的文件只能是txt
		fd.setFilenameFilter(new FilenameFilter() {

			@Override
			public boolean accept(File dir, String name) {
				// TODO 自动生成的方法存根
				name = ".txt";
				return false;
			}
		});
		fd.setVisible(true);
		File file = new File(fd.getDirectory() + "\\" + fd.getFile());
		FileReader fr = null;
		try {
			fr = new FileReader(file);

			char[] chs = new char[1024];
			int len;
			input.setText("");
			while ((len = fr.read(chs)) != -1) {
				input.append(new String(chs, 0, len));
			}
			setTitle("记事本----" + file.getName());
		} catch (IOException e2) {

		} finally {
			if (fr != null) {
				try {
					fr.close();
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}
		}

	}

//保存功能的实现
	void saveFile() {

		// 设置一个文本过滤器,使文件保存类型为txt
		FileDialog fd = new FileDialog(notepadMain.this, "保存", FileDialog.SAVE);
		// 在这里我想限制保存的文件只能是txt
		fd.setFilenameFilter(new FilenameFilter() {

			@Override
			public boolean accept(File dir, String name) {
				// TODO 自动生成的方法存根
				name = input.getText() + ".txt"; // 设置保存的默认名称为输入内容+.txt
				return false;
			}
		});
		// 显示对话框
		fd.setVisible(true);
		// 获取用户选择的文件的完整名称
		File file = new File(fd.getDirectory() + "\\" + fd.getFile());
		FileWriter fw = null;

		try {
			fw = new FileWriter(file);
			// 写文本区的数据到文件
			fw.write(input.getText());
			setTitle("记事本----" + file.getName());
		} catch (IOException e1) {

		} finally {
			if (fw != null) {
				try {
					fw.close();
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}
		}

	}

	// 另存为
	public void saveOther() {

		JFileChooser chooser = new JFileChooser();// 创建文件选择器
		int result = chooser.showSaveDialog(null);// 弹出一个save file文件选择器对话框
		if (result == JFileChooser.APPROVE_OPTION) {// JFileChooser.APPROVE_OPTION是个整数常量，代表0
			try {
				// 向磁盘中写文件
				FileWriter fout = new FileWriter(chooser.getSelectedFile(), true);// 创建文件输出流对象
				// 写数据
				String string = input.getText();
				fout.write(input.getText() + "\r\n");
				fout.close();// 关闭流，释放IO流所占的系统资源
			} catch (IOException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
		}

	}

//创建替换窗口----------------------------------未来要实现替换，此窗口里有替换要的ui
	public void setFrame() {
		JFrame frame = new JFrame();
		frame.setSize(350, 160);
		frame.setLocation(1000, 400);
		frame.setResizable(false);
		frame.setTitle("查找");
		frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		JPanel jpanel = new JPanel();
		label1 = new JLabel("查找内容(N)");
		fiel = new JTextField(10);
		but1 = new JButton("查找 下一 个(F)");// 对按钮添加事件
//		but1.addActionListener(this);
		JLabel label2 = new JLabel("替   换  为(P)");
		fiel2 = new JTextField(10);
		JButton but2 = new JButton("替     换    (   R   )");
//		but2.addActionListener(this);
		JButton but3 = new JButton("取消");
		JCheckBox box = new JCheckBox("区分大小写(C)");
		jpanel.add(label1);
		jpanel.add(fiel);
		jpanel.add(but1);
		// 这里---------------------------------
		jpanel.add(label2);
		jpanel.add(fiel2);
		jpanel.add(but2);
		jpanel.add(box);
		jpanel.add(but3);
		// 到这里的组件如果功能没有实现就注释掉--------
		frame.add(jpanel);
		frame.setVisible(true);
	}

//替换窗口事件绑定
	// 将查找按钮绑定事件
	public void addListen(String list) {
		but1.addActionListener(new ActionListener() {
			// 查找的按钮绑定
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO 自动生成的方法存根
				int column, line;// column is 列，line is 行
				index = list.indexOf(fiel.getText());
//  				line=index/row+1;
//  				column=index%row;
				if (index == -1) {
					JOptionPane.showMessageDialog(null, "没有找到目标字符，请重新确认(查找为大小写敏感)");
				} else {
					// 新弹出一个对话框显示你要查找的字符串再我文档的第几个
					JOptionPane.showMessageDialog(null, index + 1);
					input.setCaretPosition(index);
				}
			}
		});
	}
//-------------------------------------------------------------------------------   

	// ----------------------------------------------------
	public void findT() {
		final JDialog findDialog = new JDialog(this, "查找", false);// false时允许其他窗口同时处于激活状态(即无模式)
		Container con = findDialog.getContentPane();// 返回此对话框的contentPane对象
		con.setLayout(new FlowLayout(FlowLayout.LEFT));
		JLabel findContentLabel = new JLabel("查找内容");
		final JTextField findText = new JTextField(15);
		JButton findNextButton = new JButton("查找下一个");
		final JCheckBox matchCheckBox = new JCheckBox("区分大小写");
		ButtonGroup bGroup = new ButtonGroup();
		final JRadioButton upButton = new JRadioButton("向前");
		final JRadioButton downButton = new JRadioButton("向后");
		downButton.setSelected(true);
		bGroup.add(upButton);
		bGroup.add(downButton);
		
		JButton cancel = new JButton("取消");
		// 创建"查找"对话框的界面
		JPanel panel1 = new JPanel();
		JPanel panel2 = new JPanel();
		JPanel panel3 = new JPanel();
		JPanel directionPanel = new JPanel();
		directionPanel.setBorder(BorderFactory.createTitledBorder("方向"));
		
		directionPanel.add(upButton);
		directionPanel.add(downButton);
		panel1.setLayout(new GridLayout(2, 1));
		panel1.add(findNextButton);
		panel1.add(cancel);
		panel2.add(findContentLabel);
		panel2.add(findText);
		panel2.add(panel1);
		panel3.add(matchCheckBox);
		panel3.add(directionPanel);
		con.add(panel2);
		con.add(panel3);
		findDialog.setSize(410, 180);
		findDialog.setResizable(false);// 不可调整大小
		findDialog.setLocation(230, 280);
		findDialog.setVisible(true);
		// 取消按钮事件处理
		cancel.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				findDialog.dispose();
			}
		});
		// "查找下一个"按钮监听
		findNextButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) { // "区分大小写(C)"的JCheckBox是否被选中
				int k = 0, m = 0;
				final String str1, str2, str3, str4, strA, strB;
				str1 = input.getText();
				str2 = findText.getText();
				//toUpperCase()可以将字符串小写转化为大写
				str3 = str1.toUpperCase();
				str4 = str2.toUpperCase();
				if (matchCheckBox.isSelected())// 区分大小写
				{
					//strA获取用户输入的文本域的内容
					//strB获取用户希望查找的内容
					strA = str1;
					strB = str2;
				} else// 不区分大小写,此时把所选内容全部化成大写(或小写)，以便于查找
				{
					strA = str3;
					strB = str4;
				}
				if (upButton.isSelected()) { // k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1);
					if (input.getSelectedText() == null)
						k = strA.lastIndexOf(strB, input.getCaretPosition() - 1);
					else
						k = strA.lastIndexOf(strB, input.getCaretPosition() - findText.getText().length() - 1);
					if (k > -1) { // String strData=strA.subString(k,strB.getText().length()+1);
						input.setCaretPosition(k);
						input.select(k, k + strB.length());
					} else {
						JOptionPane.showMessageDialog(null, "找不到您查找的内容！", "查找", JOptionPane.INFORMATION_MESSAGE);
					}
				} else if (downButton.isSelected()) {
					if (input.getSelectedText() == null)
						k = strA.indexOf(strB, input.getCaretPosition() + 1);
					else
						k = strA.indexOf(strB, input.getCaretPosition() - findText.getText().length() + 1);
					if (k > -1) { // String strData=strA.subString(k,strB.getText().length()+1);
						input.setCaretPosition(k);
						input.select(k, k + strB.length());
					} else {
						JOptionPane.showMessageDialog(null, "找不到您查找的内容！", "查找", JOptionPane.INFORMATION_MESSAGE);
					}
				}
			}
		});// "查找下一个"按钮监听结束
		
	}// 查找方法结束
		// -----------------------------------------------------
		// 替换方法

	public void replaceT()
	 { final JDialog replaceDialog=new JDialog(this,"替换",false);//false时允许其他窗口同时处于激活状态(即无模式)
	 Container con=replaceDialog.getContentPane();//返回此对话框的contentPane对象
	 con.setLayout(new FlowLayout(FlowLayout.CENTER));
	 JLabel findContentLabel=new JLabel("查找内容：");
	 final JTextField findText=new JTextField(15);
	 JButton findNextButton=new JButton("查找下一个:");
	 JLabel replaceLabel=new JLabel("替换为：");
	 final JTextField replaceText=new JTextField(15);
	 JButton replaceButton=new JButton("替换");
	 JButton replaceAllButton=new JButton("全部替换");
	 JButton cancel=new JButton("取消");
	 cancel.addActionListener(new ActionListener()
	 { public void actionPerformed(ActionEvent e)
	 { replaceDialog.dispose();
	 }
	 });
	 final JCheckBox matchCheckBox=new JCheckBox("区分大小写");
	 ButtonGroup bGroup=new ButtonGroup();
	 final JRadioButton upButton=new JRadioButton("向前");
	 final JRadioButton downButton=new JRadioButton("向后");
	 downButton.setSelected(true);
	 bGroup.add(upButton);
	 bGroup.add(downButton);
	 
	 findNextButton.addActionListener(new ActionListener()
	 { public void actionPerformed(ActionEvent e)
	 { //"区分大小写(C)"的JCheckBox是否被选中
	 int k=0,m=0;
	 final String str1,str2,str3,str4,strA,strB;
	 str1=input.getText();
	 str2=findText.getText();
	 str3=str1.toUpperCase();
	 str4=str2.toUpperCase();
	 if(matchCheckBox.isSelected())//区分大小写
	 { strA=str1;
	  strB=str2;
	 }
	 else//不区分大小写,此时把所选内容全部化成大写(或小写)，以便于查找 
	 { strA=str3;
	  strB=str4;
	 }
	 if(upButton.isSelected())
	 { //k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1);
	  if(input.getSelectedText()==null)
	  k=strA.lastIndexOf(strB,input.getCaretPosition()-1);
	  else
	  k=strA.lastIndexOf(strB, input.getCaretPosition()-findText.getText().length()-1); 
	  if(k>-1)
	  { //String strData=strA.subString(k,strB.getText().length()+1);
		  input.setCaretPosition(k);
		  input.select(k,k+strB.length());
	  }
	  else
	  { JOptionPane.showMessageDialog(null,"找不到您查找的内容！","查找",JOptionPane.INFORMATION_MESSAGE);
	  }
	 }
	 else if(downButton.isSelected())
	 { if(input.getSelectedText()==null)
	  k=strA.indexOf(strB,input.getCaretPosition()+1);
	  else
	  k=strA.indexOf(strB, input.getCaretPosition()-findText.getText().length()+1); 
	  if(k>-1)
	  { //String strData=strA.subString(k,strB.getText().length()+1);
		  input.setCaretPosition(k);
		  input.select(k,k+strB.length());
	  }
	  else
	  { JOptionPane.showMessageDialog(null,"找不到您查找的内容！","查找",JOptionPane.INFORMATION_MESSAGE);
	  }
	 }
	 }
	 });//"查找下一个"按钮监听结束
	  
	 //"替换"按钮监听
	 replaceButton.addActionListener(new ActionListener()
	 { public void actionPerformed(ActionEvent e)
	 { if(replaceText.getText().length()==0 && input.getSelectedText()!=null) 
		 input.replaceSelection(""); 
	 if(replaceText.getText().length()>0 && input.getSelectedText()!=null) 
		 input.replaceSelection(replaceText.getText());
	 }
	 });//"替换"按钮监听结束
	  
	 //"全部替换"按钮监听
	 replaceAllButton.addActionListener(new ActionListener()
	 { public void actionPerformed(ActionEvent e)
	 { input.setCaretPosition(0); //将光标放到编辑区开头 
	 int k=0,m=0,replaceCount=0;
	 if(findText.getText().length()==0)
	 { JOptionPane.showMessageDialog(replaceDialog,"请填写查找内容!","提示",JOptionPane.WARNING_MESSAGE);
	  findText.requestFocus(true);
	  return;
	 }
	 while(k>-1)//当文本中有内容被选中时(k>-1被选中)进行替换，否则不进行while循环
	 { //"区分大小写(C)"的JCheckBox是否被选中
	  final String str1,str2,str3,str4,strA,strB;
	  str1=input.getText();
	  str2=findText.getText();
	  str3=str1.toUpperCase();
	  str4=str2.toUpperCase();
	  if(matchCheckBox.isSelected())//区分大小写
	  { strA=str1;
	  strB=str2;
	  }
	  else//不区分大小写,此时把所选内容全部化成大写(或小写)，以便于查找 
	  { strA=str3;
	  strB=str4;
	  }
	  if(upButton.isSelected())
	  { //k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1);
	  if(input.getSelectedText()==null)
	  k=strA.lastIndexOf(strB,input.getCaretPosition()-1);
	  else
	  k=strA.lastIndexOf(strB, input.getCaretPosition()-findText.getText().length()-1); 
	  if(k>-1)
	  { //String strData=strA.subString(k,strB.getText().length()+1);
		  input.setCaretPosition(k);
		  input.select(k,k+strB.length());
	  }
	  else
	  { if(replaceCount==0)
	  { JOptionPane.showMessageDialog(replaceDialog, "找不到您查找的内容!", "记事本",JOptionPane.INFORMATION_MESSAGE); 
	  }
	  else
	  { JOptionPane.showMessageDialog(replaceDialog,"成功替换"+replaceCount+"个匹配内容!","替换成功",JOptionPane.INFORMATION_MESSAGE);
	  }
	  }
	  }
	  else if(downButton.isSelected())
	  { if(input.getSelectedText()==null)
	  k=strA.indexOf(strB,input.getCaretPosition()+1);
	  else
	  k=strA.indexOf(strB, input.getCaretPosition()-findText.getText().length()+1); 
	  if(k>-1)
	  { //String strData=strA.subString(k,strB.getText().length()+1);
		  input.setCaretPosition(k);
		  input.select(k,k+strB.length());
	  }
	  else
	  { if(replaceCount==0)
	  { JOptionPane.showMessageDialog(replaceDialog, "找不到您查找的内容!", "记事本",JOptionPane.INFORMATION_MESSAGE); 
	  }
	  else
	  { JOptionPane.showMessageDialog(replaceDialog,"成功替换"+replaceCount+"个匹配内容!","替换成功",JOptionPane.INFORMATION_MESSAGE);
	  }
	  }
	  }
	  if(replaceText.getText().length()==0 && input.getSelectedText()!= null)
	  { input.replaceSelection("");
	  replaceCount++;
	  } 
	   
	  if(replaceText.getText().length()>0 && input.getSelectedText()!= null) 
	  { input.replaceSelection(replaceText.getText()); 
	  replaceCount++;
	  }
	 }//while循环结束
	 }
	 });//"替换全部"方法结束
	//创建"替换"对话框的界面
	 JPanel directionPanel=new JPanel();
	 directionPanel.setBorder(BorderFactory.createTitledBorder("方向"));
	 directionPanel.add(upButton);
	 directionPanel.add(downButton);
	 JPanel panel1=new JPanel();
	 JPanel panel2=new JPanel();
	 JPanel panel3=new JPanel();
	 JPanel panel4=new JPanel();
	 panel4.setLayout(new GridLayout(2,1));
	 panel1.add(findContentLabel);
	 panel1.add(findText);
	 panel1.add(findNextButton);
	 panel4.add(replaceButton);
	 panel4.add(replaceAllButton);
	 panel2.add(replaceLabel);
	 panel2.add(replaceText);
	 panel2.add(panel4);
	 panel3.add(matchCheckBox);
	 panel3.add(directionPanel);
	 panel3.add(cancel);
	 con.add(panel1);
	 con.add(panel2);
	 con.add(panel3);
	 replaceDialog.setSize(420,220);
	 replaceDialog.setResizable(false);//不可调整大小
	 replaceDialog.setLocation(230,280);
	 replaceDialog.setVisible(true);
	 }//"全部替换"按钮监听结束
	//--------------------------------------------------------------

	public static void main(String[] args) {
		new notepadMain();
	}
}

运行结果截图