notepad.java

用java编写的一个记事本小程序

		public void windowClosed(WindowEvent e) { }
		public void windowIconified(WindowEvent e) { }
		public void windowDeiconified(WindowEvent e) { }

		public void actionPerformed(ActionEvent ae)
		{
			target = tf.getText();
			if (ae.getSource().equals(bt))
			{

				start = allcontent.indexOf(tf.getText(), start);
				if (start == -1)
				{
					lb.setText("End!");
					start = 0;
					length = 0;
					target = null;
				}
				else
				{
					length = tf.getText().length();
					content.select(start, start + length);
					start = start + length;
					content.requestFocus();
				}

			
			}
		}
	}

	public class Change extends Dialog implements ActionListener, WindowListener
	{
		Label lb;
		TextField tf;
		TextField tf2;
		Button bt;
		Button cg;
		Button replaceall;
		//Panel pn;
		int start = 0;
		String allcontent;
		String target = null;
		int length;
		Change(Frame frame, String s, boolean b)
		{
			super(frame, s, b);
			//find = new Dialog(frame, s, b);
			lb = new Label("");
			tf = new TextField(10);
			tf2 = new TextField(10);
			bt = new Button("Find");
			cg = new Button("Change");
			replaceall = new Button("RelpaceAll");
			//pn = new Panel(new GridLayout(2,1));
			setLayout(new GridLayout(4, 2));
			add(new Label(""));
			add(new Label(""));
			add(tf);
			add(bt);
			add(tf2);
			add(cg);
			add(lb);
			
			add(replaceall);
			setSize(400, 200);
			this.setLocation(500, 300);
			setVisible(true);
			addWindowListener(this);
			bt.addActionListener(this);
			cg.addActionListener(this);
			replaceall.addActionListener(this);
		}
		public void windowClosing(WindowEvent e)
		{ dispose(); }
		public void windowOpened(WindowEvent e) { }
		public void windowActivated(WindowEvent e) { }
		public void windowDeactivated(WindowEvent e) { }
		public void windowClosed(WindowEvent e) { }
		public void windowIconified(WindowEvent e) { }
		public void windowDeiconified(WindowEvent e) { }

		public void actionPerformed(ActionEvent ae)
		{

			target = tf.getText();
			if (ae.getSource().equals(bt))
			{
				allcontent = content.getText();
				start = allcontent.indexOf(tf.getText(), start);
				if (start == -1)
				{
					lb.setText("End!");
					start = 0;
					length = 0;
					target = null;
				}
				else
				{
					length = tf.getText().length();
					content.select(start, start + length);
					start = start + length;
					content.requestFocus();
				}


			}

			if (ae.getSource().equals(cg))
			{
				allcontent = content.getText();
				start = allcontent.indexOf(tf.getText(), start);
				if (start == -1)
				{
					lb.setText("End!");
					start = 0;
					length = 0;
					target = null;
				}
				else
				{
					length = tf.getText().length();
					content.select(start, start + length);

					//content.requestFocus();


					int begin = content.getSelectionStart();
					int end = content.getSelectionEnd();
					content.replaceRange(tf2.getText(), begin,end);
					start = start + tf2.getText().length();
					content.requestFocus();
					message.setText("File content Modified");
				}
			}

			if (ae.getSource().equals(replaceall))
			{
				int count = 0;
				if(tf2.getText()==null||tf.getText()==null||content.getText()==null)
				{
					lb.setText("No Information");
				}
				else
				{
					while (true)
					{
						allcontent = content.getText();
						start = allcontent.indexOf(tf.getText(), start);
						if (start == -1)
							break;
						length = tf.getText().length();
						content.select(start, start + length);
					
						content.requestFocus();

						int begin = content.getSelectionStart();
						int end = content.getSelectionEnd();
						content.replaceRange(tf2.getText(), begin, end);
						start = start + tf2.getText().length();
						content.requestFocus();
						count++;
					}
					lb.setText(count+" places have been replaced! ");
					message.setText("File content Modified");
				}
			}
		}
	}

//above is the edit menu

	class font extends Frame implements ActionListener
	{
		Choice font1, size, bolder;
		Button bb;
		Button sure;
		Color c2=Color.black;
		final int bold1[]={Font.BOLD,Font.CENTER_BASELINE,Font.CENTER_BASELINE,Font.ITALIC, 
				Font.PLAIN,Font.ROMAN_BASELINE,Font.TRUETYPE_FONT};;
		String bold[]={"Font.BOLD","Font.CENTER_BASELINE","Font.CENTER_BASELINE","Font.ITALIC", 
				"Font.PLAIN","Font.ROMAN_BASELINE","Font.TRUETYPE_FONT"};;
		font(String s)
		{
			setTitle(s);
			font1 = new Choice();
			bolder = new Choice();
			size = new Choice();
			Panel p1 = new Panel();
			Panel p2 = new Panel();
			bb = new Button("Click to open");
			sure = new Button("OK");
			sure.addActionListener(this);
			bb.addActionListener(this);
			p1.setLayout(new GridLayout(4, 1));
			p2.setLayout(new GridLayout(4, 1));

			GraphicsEnvironment gg = GraphicsEnvironment.getLocalGraphicsEnvironment();
			String ss[] = gg.getAvailableFontFamilyNames();
			for (int i = 126; i < ss.length; i++)
				font1.add(ss[i]);
			for (int i = 12; i <= 64; i += 2)
			{
				String w = String.valueOf(i);
				size.add(w);
			}
			for (int i = 0; i < bold.length; i++)
			{
				bolder.add(bold[i]);
			}
			p1.add(new Label("Font Name"));
			p1.add(font1);
			p1.add(new Label("Size"));
			p1.add(size);
			p2.add(new Label("Style"));
			p2.add(bolder);
			p2.add(new Label("Color"));
			p2.add(bb);
			add(p2, BorderLayout.WEST);
			add(p1, BorderLayout.EAST);
			add(sure,BorderLayout.SOUTH);
			setSize(250, 150);
			setVisible(true);
			pack();
			addWindowListener(new WindowAdapter()
			{
				public void windowClosing(WindowEvent ee)
				{
					
					dispose();
				}
			});
		}
		public String returnfont1()
		{
			return font1.getSelectedItem();
		}
		public int returnbolder()
		{
			return bolder.getSelectedIndex();
		}
		public int returnsize()
		{
			return Integer.parseInt(size.getSelectedItem());
		}

		public void actionPerformed(ActionEvent e)
		{
			if (e.getSource().equals(bb))
			{	
				c2 = JColorChooser.showDialog(this, "color change", null);
				bb.setBackground(c2);
			}
			if(e.getSource().equals(sure))
			{
				int i=returnbolder();
				Font f=new Font(returnfont1(),bold1[i],returnsize());
				content.setFont(f);
				content.setForeground(c2);
				dispose();
			}
		}


	}
	
	public class About extends Dialog implements WindowListener
	{
		Label lb;
		
		About(Frame frame,String s,boolean b)
		{
			super(frame, s, b);
			
			//find = new Dialog(frame, s, b);
			lb = new Label("Make by Bill,V1.0");
			add(lb);
			setSize(300, 150);
			this.setLocation(500, 300);
			setVisible(true);
			addWindowListener(this);

		}
		public void windowClosing(WindowEvent e)
		{ dispose(); }
		public void windowOpened(WindowEvent e) { }
		public void windowActivated(WindowEvent e) { }
		public void windowDeactivated(WindowEvent e) { }
		public void windowClosed(WindowEvent e) { }
		public void windowIconified(WindowEvent e) { }
		public void windowDeiconified(WindowEvent e) { }

	}
//above is the Help menu
	public void actionPerformed(ActionEvent ae)
	{
		if (ae.getSource().equals(newFile))
		{
			String cmp=message.getText();
			if(cmp.equals(new String("File content Modified")))
			{	
				new Ask(this, "New", false);
			}
			
			else
				newfile();
		}
		if (ae.getSource().equals(open))
			open();
		if (ae.getSource().equals(save))
			save();
		if (ae.getSource().equals(saveas))
			saveas();
		if (ae.getSource().equals(exit))
		{
			String cmp=message.getText();
			if(cmp.equals(new String("File content Modified")))
			{	
				new Ask2(this, "Exit", false);
			}
			
			else
				System.exit(0);
		}
		if (ae.getSource().equals(undo))
			undo();
		if (ae.getSource().equals(copy))
			copy();
		if (ae.getSource().equals(paste))
			paste();
		if (ae.getSource().equals(cut))
			cut();
		if (ae.getSource().equals(search))
		{
			new Find(this, "Find", false);
			
		}
		if (ae.getSource().equals(searchAndChange))
		{
			new Change(this, "Change", false);
			
		}
		if (ae.getSource().equals(font))
			new font("Font");
		if (ae.getSource().equals(about))
		{
			new About(this, "About", false);
			
		}
		
	}

	public void textValueChanged(TextEvent e)
	{
		message.setText("File content Modified");
	}

	public void windowClosing(WindowEvent e)
	{ 
		
			String cmp=message.getText();
			if(cmp.equals(new String("File content Modified")))
			{	
				new Ask2(this, "Exit", false);
			}
			else
				System.exit(0); 
	}
	public void windowOpened(WindowEvent e) { }
	public void windowActivated(WindowEvent e) { }
	public void windowDeactivated(WindowEvent e) { }
	public void windowClosed(WindowEvent e) { }
	public void windowIconified(WindowEvent e) { }
	public void windowDeiconified(WindowEvent e) { }

	public void keyPressed(KeyEvent e) 
	{
		if (e.getKeyCode() == e.VK_BACK_SPACE)
		{
			//System.exit(0);
			if (firstBackspace == 1)
			{
				tmp = content.getText();
				firstBackspace++;
			}

		}
	}
	public void keyReleased(KeyEvent e){}
	public void keyTyped(KeyEvent e){}

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