mytexteditor.java

利用javaApplet实现的记事本程序

		else if(e.getSource() == jcopy)	{ //复制
			try { 
				String str = this.text.getSelectedText(); 
				if(str.length() != 0) { 
					this.strtext=str; 
				} 
			}
			catch(Exception ex) 
			{ 
				this.statusbar.setText("复制出错!" + ex.getMessage()); 
			} 
		}
		else if(e.getSource() == jpaste) { //粘贴
			if(this.strtext.length() > 0){ 
				this.text.insert(this.strtext,this.text.getCaretPosition()); 
				this.isChanged = true; 
			} 
		}
		else if(e.getSource() == jfind)	{ //查找
			JOptionPane.showMessageDialog(frame1, "抱歉，还未实现查找~");			
		}
		else if(e.getSource() == jreplace)	{ //替换
			JOptionPane.showMessageDialog(frame1, "抱歉，还未实现替换~");
		}
		else if(e.getSource() == jselectall)	{ //全选
			this.text.setSelectionStart(0); 
			this.text.setSelectionEnd(this.text.getText().length()); 
		}
		else if(e.getSource() == jdate) { //时间日期
			java.text.SimpleDateFormat formatter = new java.text.SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
			//设置时间的格式
			java.util.Date currentTime = new java.util.Date(); //获取当前时间
			String datetime = formatter.format(currentTime).toString(); //将当前时间按格式转为字符串
			text.setText(text.getText() + datetime); //将时间添加到文件末尾
			this.isChanged = true; 
  	}

		else if(e.getSource() == jchangeLine)	{ //自动换行
			if(!this.text.getLineWrap()){ 
				this.text.setLineWrap(true); 
			} 
			else{ 
				this.text.setLineWrap(false); 
			} 
		}
		else if(e.getSource() == jfont)	{ //设置字体
			Font cur = this.text.getFont(); //字体，初始取原有值
			int type ; //字型
			int size ; //字号
			FontSet fsd = new FontSet(frame1, "字体设置", true); 
			fsd.setVisible(true);
			
			if(fsd.flag){ //点击确定按钮，设置新的字体
				switch(fsd.getFontType()){ 
					case 0: type = Font.PLAIN; break; 
					case 1: type = Font.ITALIC; break; 
					case 2: type = Font.BOLD;  break; 
					case 3: type = Font.ROMAN_BASELINE; break; 
					default: type = Font.PLAIN; break; 
				} 
				Font newfont = new Font(fsd.getFont1(), type, fsd.getFontSize()); 
				this.text.setFont(newfont); 
			}
			else { //取消键，则保留原字体
				this.text.setFont(cur); 
			} 
		}
		else if(e.getSource() == jcolor){ //设置文字颜色
			textColor = JColorChooser.showDialog(frame1, "", textColor); 
			text.setForeground(textColor); 		
		}
		else if(e.getSource() == jabout)	{ //关于作者
			JOptionPane.showMessageDialog(frame1, "Developed By 王敬智");
		}
	}
	
	private void open() {
		if(jFileChooser1.showOpenDialog(frame1) == JFileChooser.APPROVE_OPTION){
			open(jFileChooser1.getSelectedFile());
		}
	}
	private void open(File file_open){
		try{
			BufferedInputStream in = new BufferedInputStream(
			 new FileInputStream(file_open));
			byte[] b = new byte[in.available()];
			in.read(b, 0, b.length);
			//text.append(new String(b, 0, b.length));  //在现有文件的尾部加上新打开的文件
			text.setText(new String(b, 0, b.length));  //覆盖原有文件式的打开
			in.close();
			isSaved = true;
			statusbar.setText(file_open.getName() + " Opened");
		}
		catch(IOException ex){
			statusbar.setText("Error opening " + file_open.getName());
		}
	}
			
	private void save()	{
		if(isSaved == false){
			if(jFileChooser1.showSaveDialog(frame1) == JFileChooser.APPROVE_OPTION){
				 save(jFileChooser1.getSelectedFile());
			}
		}
		else{
			save(jFileChooser1.getSelectedFile());
		}
	}
	private void save(File file_save){		
		try {
			BufferedOutputStream out = new BufferedOutputStream(
			new FileOutputStream(file_save));
			byte[] b = (text.getText().getBytes());
			out.write(b, 0, b.length);
			out.close();
			isSaved = true;
			statusbar.setText(file_save.getName() + " saved");
		}
		catch(IOException ex){
			statusbar.setText("Error saving " + file_save.getName());
		}
	}
	
		 
/*-------------* 
 *  main  
*----------- */ 

	public static void main(String[] args){ 
		MyTextEditor MTE = new MyTextEditor(); 
	} 
}

/*----------------------*
*--- 字体设置对话框 ------*
*---------------------*/

class FontSet extends JDialog { 
	private String font1 = "    "; 
	JLabel txtStr = new JLabel("字体"); 
	JLabel txt2 = new JLabel("字型"); 
	JLabel txt3 = new JLabel("字号");
	java.awt.List list1 = new java.awt.List(6,false); 
	java.awt.List list2 = new java.awt.List(5,false); 
	java.awt.List list3 = new java.awt.List(6,false);
	JButton btnOk = new JButton("确定"); 
	JButton btnNo = new JButton("取消"); 
	FlowLayout flowLayout1 = new FlowLayout(); 
	
	boolean flag = true; 
	int type; 
	int size;
		
	public FontSet(Frame frame, String title, boolean modal){ //对话框构造方法
		this.setTitle("字体设置"); 
		this.setSize(800,150); 
		this.setModal(true); 

		txtStr.setSize(50,100); 
		list1.setSize(300,150); 
		list1.setMultipleMode(false); //单选

		txt2.setSize(50,100); 
		list2.setSize(200,150); 
		
		txt3.setSize(50,100);
		list3.setSize(100,150);

		btnOk.setMnemonic('Y'); 
		btnOk.setSize(100,20); 
		btnOk.addActionListener(new btnOk_actionAdapter(this)); 

		btnNo.setMnemonic('N'); 
		btnNo.setSize(100,20); 
		btnNo.addActionListener(new btnNo_actionAdapter(this)); 
		btnNo.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent eok){
				setVisible(false);
			}
		}); 
		
///////////// Font ////////////////////////////////// 
		GraphicsEnvironment gl = GraphicsEnvironment.getLocalGraphicsEnvironment(); 
		String fontName[] = gl.getAvailableFontFamilyNames(); //获取当前可使用的字体
		//String fontName[] = {"中文宋体", "中文楷体", "黑体"};
		
		for(int i=0; i<fontName.length; i++){ //将可用的字体加到list1列表框中
			list1.add(fontName[i]); 
		} 
		String fontx[] = {"常规","斜体","粗体","粗斜体"}; 
		for(int i=0; i<fontx.length; i++){ //将可用的字型加到list2列表框中
			list2.add(fontx[i]); 
		} 
		
		int fontSize[] = {10,12,14,16,18,20,22,24,26,30,32,34,36,38,40};
		for(int i=0;i<fontSize.length;i++){ //将可用的字号加到list3列表框中
			list3.add(Integer.toString(fontSize[i])); //添加时将整型的字号转为String类
		}
			
		list1.select(0); //设置初始默认选择
		list2.select(0); 
		list3.select(8);
//// 将各组件添加进来 ////// 
		this.getContentPane().setLayout(flowLayout1); 
		this.getContentPane().add(txtStr,flowLayout1); 
		this.getContentPane().add(list1,flowLayout1); 
		this.getContentPane().add(txt2,flowLayout1); 
		this.getContentPane().add(list2,flowLayout1); 
		this.getContentPane().add(txt3,flowLayout1); 
		this.getContentPane().add(list3,flowLayout1); 
		this.getContentPane().add(btnOk,flowLayout1); 
		this.getContentPane().add(btnNo,flowLayout1); 
}
 
	public FontSet(){ //无参数构造方法
		this(null,"",true); 
	} 
	void btnOk_actionPerformed(ActionEvent e){ //确认键事件响应
		this.flag = true; 
		this.font1 = this.list1.getSelectedItem(); 
		this.type = this.list2.getSelectedIndex(); 
		this.size = Integer.parseInt(this.list3.getSelectedItem()); 
		this.dispose(); 
	} 
	void btnNo_actionPerformed(ActionEvent e){ //取消键事件响应
		this.flag = false; 
		this.dispose(); 
	}

	public String getFont1(){ //获得字体
		return this.font1; 
	} 
	public int getFontType(){ //获得字型
		return this.type; 
	} 
	public int getFontSize(){ //获得字号
		return this.size; 
	} 
	class btnOk_actionAdapter implements java.awt.event.ActionListener{ 
		FontSet adaptee; 
		btnOk_actionAdapter(FontSet adaptee){ 
			this.adaptee = adaptee;  //设置监听器
		} 
		public void actionPerformed(ActionEvent e){ 
			adaptee.btnOk_actionPerformed(e); //调用事件响应方法
		} 
	} 

	class btnNo_actionAdapter implements java.awt.event.ActionListener{ 
		FontSet adaptee; 
		btnNo_actionAdapter(FontSet adaptee){ 
			this.adaptee = adaptee; //设置监听器
		} 
		public void actionPerformed(ActionEvent e){ 
			adaptee.btnNo_actionPerformed(e); //调用事件响应方法
		} 
	} 
}