一个简单的文本编辑器

package UserJFrame;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FileDialog;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.MenuBar;
import java.awt.Panel;
import java.awt.TrayIcon.MessageType;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.font.TextLayout;

import javax.swing.ButtonGroup;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Group;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.LayoutStyle;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.plaf.basic.BasicBorders.RadioButtonBorder;
import javax.swing.text.StyledEditorKit.BoldAction;

public class UserJFrame extends JFrame implements ActionListener, MouseListener {
	private JButton btnAdd;
	private JTextArea textarea;
	private JRadioButton btnMan,btnFelman;
	private JTextField tfdNumber,tfdName;
	private JComboBox comProvince,comCitys;
	private int number=1;
	private Object[][] citys;
	private JTextField tfd1;
	private JMenuItem jmenuItemcolor[]=null;
	private JDialog jdialog1,jdialogsave;
	private Font font1;
	private JPopupMenu jpopupmenu;
	private JPanel jpanel1,jpanel2;
	private JComboBox combofonename,combofonesize;
	private JCheckBox checkBold,checkItalic;
	private JRadioButton radioColor[];
	private Font font;
	public UserJFrame(Object[] province, Object[][] citys) {
		super("个人信息统计");
		this.citys=citys;
		this.setBounds(200, 200, 650, 400);
		this.getContentPane().setBackground(Color.lightGray);
		this.getContentPane().setLayout(new BorderLayout());
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		//设置菜单栏
		addMymenu();//调用下面声明的菜单栏相关代码
		jpanel1=new JPanel();//用来存放工具栏的面板
		jpanel2=new JPanel();//用来搞下面的文本区和信息添加区的面板
		JToolBar jtoolbar=new JToolBar();//给工具栏开空间
		//以下为工具栏的内容，包括字体大小设置，字体设置，字形选择框
		//获取系统字体
		GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
		String fonesName[]=ge.getAvailableFontFamilyNames();
		combofonename=new JComboBox(fonesName);
		combofonename.addActionListener(this);//添加字体的监听
		jtoolbar.add(combofonename);
		//字体大小设置
		String fonesSize[]={"20","30","40","50","60","70"};
		combofonesize=new JComboBox(fonesSize);
		combofonesize.addActionListener(this);
		jtoolbar.add(combofonesize);
		combofonesize.setEditable(true);
		//字体选择
		checkBold=new JCheckBox("粗体");
		checkItalic=new JCheckBox("斜体");
		jtoolbar.add(checkBold);
		jtoolbar.add(checkItalic);
		//颜色选择
		String colorStr[]={"红","绿","蓝","黑"};
		radioColor=new JRadioButton[colorStr.length];
		ButtonGroup group=new ButtonGroup();
		for(int i=0;i<colorStr.length;i++){
			radioColor[i]=new JRadioButton(colorStr[i]);
			jtoolbar.add(radioColor[i]);
			group.add(radioColor[i]);
			radioColor[i].addActionListener(this);
		}
		jpanel1.add(jtoolbar);//工具栏加到jpanel1中
		this.getContentPane().add(jpanel1, BorderLayout.NORTH);//设定jpanel1的位置并添加到整个面板中
		this.getContentPane().add(jpanel2);//jpanel2添加进去
		jpanel2.setLayout(new GridLayout(1, 2));//把界面1分2，左边为文本框眼，右边为信息添加部分栏
		textarea=new JTextArea();
		//textarea.setEditable(false);   //如果有这条代码，则文本框不可编辑
		jpanel2.add(new JScrollPane(textarea));
		JPanel jpanel=new JPanel(new GridLayout(7, 1));
		jpanel2.add(jpanel);
		//把各种元素加进右边面板
		tfdNumber=new JTextField("1");
		tfdNumber.setEditable(false);
		jpanel.add(tfdNumber);
		
		tfdName=new JTextField("姓名：");
		jpanel.add(tfdName);
		
		JPanel jpanelrd=new JPanel(new GridLayout(1,2));
		btnMan=new JRadioButton("男",true);
		btnFelman=new JRadioButton("女");
		jpanelrd.add(btnMan);
		jpanelrd.add(btnFelman);
		jpanel.add(jpanelrd);
		ButtonGroup btngroup=new ButtonGroup();// 使其中的按键（男，女）互斥，只能选择一个,所以把他们放在同一个按键组里
		btngroup.add(btnMan);
		btngroup.add(btnFelman);
		//省份组合框
		comProvince=new JComboBox(province);
		comProvince.addActionListener(this);
		jpanel.add(comProvince);
		
		comCitys=new JComboBox(citys[0]);
		jpanel.add(comCitys);
		
		tfd1=new JTextField("备注:");
		jpanel.add(tfd1);
			
		btnAdd=new JButton("添加");
		btnAdd.addActionListener(this);
		jpanel.add(btnAdd);
		//添加鼠标右键快捷菜单
		jpopupmenu=new JPopupMenu();
		String popumenuItem[]={"粘贴","复制","剪切"};
		JMenuItem popumenuItemadd[]=new JMenuItem[popumenuItem.length];
		for(int i=0;i<popumenuItem.length;i++){
			popumenuItemadd[i]=new JMenuItem(popumenuItem[i]);
			jpopupmenu.add(popumenuItemadd[i]);
			popumenuItemadd[i].addActionListener(this);
		}
		textarea.add(jpopupmenu);
		textarea.addMouseListener(this);
		this.setVisible(true);
	}
	private void addMymenu() {
		JMenuBar jmenubar=new JMenuBar();
		setJMenuBar(jmenubar);
		String menustr[]={"文件","编辑","帮助"};
		JMenu menu[]=new JMenu[menustr.length];
		for(int i=0;i<menustr.length;i++){
			menu[i]=new JMenu(menustr[i]);
			jmenubar.add(menu[i]);
		}
		//"文件"菜单的子菜单
		JMenuItem open=new JMenuItem("打开");
		open.setActionCommand("open");
		open.addActionListener(this);
		menu[0].add(open);
		JMenuItem save=new JMenuItem("保存");
		menu[0].add(save);
		
		menu[0].addSeparator();
		
		JMenuItem past=new JMenuItem("粘贴");
		past.addActionListener(this);
		menu[0].add(past);
		
		JMenuItem copy=new JMenuItem("复制");
		copy.addActionListener(this);
		menu[0].add(copy);
		
		JMenuItem cut=new JMenuItem("剪切");
		cut.addActionListener(this);
		menu[0].add(cut);
		
		menu[0].addSeparator();
		
		JMenuItem exit=new JMenuItem("退出");
		exit.setActionCommand("exit");
		exit.addActionListener(this);
		menu[0].add(exit);
		//"编辑 "菜单的子菜单
		JMenu wordstyle=new JMenu("字形");
		menu[1].add(wordstyle);
		JMenu colorstyle=new JMenu("颜色设置");
		menu[1].add(colorstyle);
		//设置“字形的二级菜单”
		String wordstyle1[]={"粗体","斜体"};
		JMenuItem jmenuitem[]=new JMenuItem[wordstyle1.length];
		for(int i=0;i<wordstyle1.length;i++){
			jmenuitem[i]=new JMenuItem(wordstyle1[i]);
			wordstyle.add(jmenuitem[i]);
			jmenuitem[i].addActionListener(this);
		}
		//设置“颜色设置”二级菜单
		String colorstyle1[]={"红","绿","蓝","黑"};
		jmenuItemcolor=new JMenuItem[colorstyle1.length];
		for(int i=0;i<colorstyle1.length;i++){
			jmenuItemcolor[i]=new JMenuItem(colorstyle1[i]);
			colorstyle.add(jmenuItemcolor[i]);
			jmenuItemcolor[i].addActionListener(this);
		}
		
		JMenuItem jmenuitemhelp=new JMenuItem("相关帮助咨询");
		jmenuitemhelp.addActionListener(this);
		menu[2].add(jmenuitemhelp);

	}
	
@Override
	public void actionPerformed(ActionEvent e) {
		if(e.getSource()==btnAdd){
			String aline;
			//添加名字和编号
			aline=this.number+","+tfdName.getText();
			//添加性别
			if(btnMan.isSelected()){
				aline=aline+","+btnMan.getText();
			}
			if(btnFelman.isSelected()){
				aline=aline+","+btnFelman.getText();
			}
			//添加省份
			aline=aline+","+comProvince.getSelectedItem();
			
			//添加市级
			aline=aline+","+comCitys.getSelectedItem();
			//添加备注
			aline=aline+","+tfd1.getText();
			tfd1.setText("备注:");
			
			textarea.append(aline+"
");
			this.number++;
			tfdNumber.setText(""+this.number);
			tfdName.setText("姓名:");
			
		}
		
		else if(e.getSource()==comProvince){
			int i=comProvince.getSelectedIndex();
			comCitys.removeAllItems();
			System.out.println(citys[i].length);
			for(int j=0;j<citys[i].length;j++){
				comCitys.addItem(citys[i][j]);
			}
		}
		else if(e.getSource() instanceof JMenuItem||e.getSource() instanceof JRadioButton){
			//设置颜色的监听
			Color color=null;  //用传参的思维做颜色
			if(e.getActionCommand().equals("红")){
				color=new Color(255,0,0);
			}
			if(e.getActionCommand().equals("绿")){
				color=new Color(0,255,0);
			}
			if(e.getActionCommand().equals("蓝")){
				color=new Color(0,0,255);
			}
			if(e.getActionCommand().equals("黑")){
				color=new Color(0,0,0);
			}
			textarea.setForeground(color);
			//设置帮助的监听
			if(e.getActionCommand().equalsIgnoreCase("相关帮助咨询")){
				jdialog1=new JDialog(this,true);
				jdialog1.setSize(330, 100);
				int lx=getX()+20;
				int ly=getY()+20;
				jdialog1.setLocation(lx, ly);
				jdialog1.add(new Label("相关帮助请咨询电话10010，最终解释权归联通公司所有！"));
				jdialog1.setVisible(true);
			}
			//设置字形的监听
			if(e.getActionCommand().equals("粗体")){
				font1=new Font(getName(),20, 20);
				textarea.setFont(font1);
			}
			if(e.getActionCommand().equals("斜体")){
				
			}
			//退出的监听
			if(e.getActionCommand().equalsIgnoreCase("exit")){
				int option=JOptionPane.showConfirmDialog(this, "你确定保存并退出么？");
				if(option==JOptionPane.OK_OPTION){
					System.out.println("保存中...");
					System.exit(0);
				}
				if(option==JOptionPane.NO_OPTION){
					System.exit(0);
				}
				if(option==JOptionPane.CANCEL_OPTION){
					return;
				}
				
			}
			//保存的监听
			if(e.getActionCommand().equalsIgnoreCase("复制")){
				textarea.copy();
			}
			//粘贴监听
			if(e.getActionCommand().equalsIgnoreCase("粘贴")){
				textarea.paste();
			}
			//剪切监听
			if(e.getActionCommand().equalsIgnoreCase("剪切")){
				textarea.cut();
			}
			//打开的监听
			if(e.getActionCommand().equals("open")){
				openFile();
			}
		
		}	//字形的监听
		/*if(e.getSource() instanceof JComboBox ){
				String fontName=(String) combofonename.getSelectedItem();
				int fontSize=0;
				String strSize=(String) combofonesize.getSelectedItem();
				int style = changeStyle(e);
				font=new Font(fontName, style, fontSize);
				textarea.setFont(font);
		}
	}
	private int changeStyle(ActionEvent e) {
	// TODO Auto-generated method stub
	return 0;*/
	}
	private void openFile() {
		FileDialog openFileDlg = new FileDialog(this, "打开文件", FileDialog.LOAD);
        openFileDlg.setVisible(true);
}
	
	@Override
	public void mouseClicked(MouseEvent e) {
		if(e.getModifiers()==MouseEvent.BUTTON3_MASK){
			jpopupmenu.show(textarea,e.getX(), e.getY());
		}
	}
	public void mousePressed(MouseEvent e) {
	}
	public void mouseReleased(MouseEvent e) {
	}
	public void mouseEntered(MouseEvent e) {
	}
	public void mouseExited(MouseEvent e) {
	}
	public static void main(String[] args) {
		Object province[]={"四川省","湖南省","江苏省"};
		Object citys[][]={{"成都市","遂宁市","南充市","德阳市","绵阳市"},
						  {"益阳市","长沙市","株洲市","湘潭市","岳阳市"},
						  {"南京市","苏州市","无锡市"}
		};
		new UserJFrame(province,citys);
	}
}<img src="https://img-blog.csdn.net/20160306201345897?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />