notepad.java

里面所含源码是本人平时做程序的一些实例

package notepad;

import java.awt.Dimension;
import java.awt.Font;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.Calendar;

import javax.swing.DefaultListModel;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JToolBar;
import javax.swing.ListSelectionModel;

;

public class Notepad extends JFrame {
	JPanel pnlMain;
	Calendar c = Calendar.getInstance();

	DefaultListModel dlmName;
	JList lstName;
	JMenuBar mbMain;
	JMenu mnuSystem, mnuEdit, mnuHelp;
	JMenuItem mnuiCls, mnuiSave, mnuiClock, mnuiExit, mnuiContent, mnuiIndex,
			mnuiAbout, mnuiSelectAll, mnuiClear;
	JToolBar tb = new JToolBar();
	JButton btnNew = null;
	JButton btnOpen = null;
	JButton btnSave = null;
	JButton btnExit = null;
	JTextArea ta;

	public Notepad() {
		super("记事本");
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		Font font = new Font("宋体", Font.PLAIN, 12);
		// 列表框初始化
		ta = new JTextArea("这是一个文本域组件");
		ta.setLineWrap(true);
		dlmName = new DefaultListModel();
		dlmName.addElement("刘志成");
		dlmName.addElement("刘德华");
		dlmName.addElement("张学友");
		dlmName.addElement("李四");
		dlmName.addElement("王咏梅");
		lstName = new JList(dlmName);
		lstName.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		lstName.setSelectedIndex(0);
		System.out.println(Calendar.DATE);
		// 菜单初始化
		mbMain = new JMenuBar();
		mnuSystem = new JMenu("系统(S)");
		// mnuSystem.setDelay(2);
		mnuEdit = new JMenu("编辑(E)");
		// mnuEdit.setDelay(3);
		mnuHelp = new JMenu("帮助(H)");
		mnuSystem.setMnemonic('S');
		mnuEdit.setMnemonic('E');
		mnuHelp.setMnemonic(KeyEvent.VK_H);
		mbMain.add(mnuSystem);
		mbMain.add(mnuEdit);
		mbMain.add(mnuHelp);

		// 初始化系统菜单项
		mnuiCls = new JMenuItem("清除屏幕显示");
		mnuiSave = new JMenuItem("保存聊天记录");
		mnuiClock = new JMenuItem("显示系统时间");
		mnuiExit = new JMenuItem("退出系统");
		mnuiExit.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				JOptionPane.showMessageDialog(null, "谢谢使用");
				System.exit(0);
			}
		});
		mnuSystem.add(mnuiCls);
		mnuSystem.add(mnuiSave);
		mnuSystem.addSeparator();
		mnuSystem.add(mnuiExit);
		// 初始化编辑菜单
		mnuiSelectAll = new JMenuItem("全选");
		mnuiClear = new JMenuItem("删除");
		mnuEdit.add(mnuiSelectAll);
		mnuEdit.add(mnuiClear);
		// 初始化帮助菜单
		Icon icnContent = new ImageIcon("E:/java/images/22.gif");
		mnuiContent = new JMenuItem("目录", icnContent);
		mnuiIndex = new JMenuItem("索引");
		mnuiAbout = new JMenuItem("关于[HappChat]聊天系统");
		mnuHelp.add(mnuiContent);
		mnuHelp.add(mnuiIndex);
		mnuHelp.add(mnuiAbout);
		// 初始化工具栏
		btnNew = makeButton("E:/java/images/new", "新建一个文件", "新建");
		btnOpen = makeButton("E:/java/images/open", "打开一个文件", "打开");
		btnSave = makeButton("E:/java/images/save", "保存一个文件", "保存");
		btnExit = makeButton("E:/java/images/exit", "退出系统", "退出");
		// Insets ist=new Insets(0,0,0,0);//设置工具栏与它的按钮之间的距离
		tb.add(btnNew);
		tb.add(btnOpen);
		tb.add(btnSave);
		tb.add(btnExit);
		// 设置工具栏位置
		pnlMain = new JPanel(null);
		setContentPane(pnlMain);
		tb.setBounds(0, 0, 400, 40);
		lstName.setBounds(10, 40, 200, 300);
		ta.setBounds(220, 40, 200, 300);
		pnlMain.add(ta);
		pnlMain.add(tb);
		pnlMain.add(lstName);
		// 设置组件字体
		mnuSystem.setFont(font);
		mnuEdit.setFont(font);
		mnuHelp.setFont(font);
		mnuiCls.setFont(font);
		mnuiSave.setFont(font);
		mnuiClock.setFont(font);
		mnuiExit.setFont(font);
		mnuiSelectAll.setFont(font);
		mnuiClear.setFont(font);
		mnuiContent.setFont(font);
		mnuiIndex.setFont(font);
		mnuiAbout.setFont(font);
		setSize(500, 400);
		Toolkit tk = Toolkit.getDefaultToolkit();
		Dimension scrnSize = Toolkit.getDefaultToolkit().getScreenSize();
		Dimension frameSize = this.getSize();
		if (frameSize.height > scrnSize.height) {
			frameSize.height = scrnSize.height;
		}
		if (frameSize.width > scrnSize.width) {
			frameSize.width = scrnSize.width;
		}
		// 使窗口居中对齐
		setLocation((scrnSize.width - frameSize.width) / 2,
				(scrnSize.height - frameSize.height) / 2);

		setJMenuBar(mbMain);
		setVisible(true);
	}

	// 创建工具栏按钮方法
	JButton makeButton(String strImage, String txtToopTip, String strAlter) {
		String imgLocation = strImage + ".gif";
		// 引入java.net.URL包可以保证makeButton方法中的URL类正常使用
		// URL urlImage=Notepad.class.getResource(imgLocation);
		JButton btnTemp = new JButton(new ImageIcon(imgLocation));
		btnTemp.setActionCommand(strAlter);
		btnTemp.setToolTipText(txtToopTip);
		btnTemp.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				JOptionPane.showMessageDialog(null, "您选择了:"
						+ ae.getActionCommand());
				if (ae.getSource() == btnExit)
					System.exit(0);
			}
		});

		/*
		 * if(urlImage!=null) btnTemp.setIcon(new ImageIcon(urlImage)); else
		 * btnTemp.setText(strAlter);
		 */
		return btnTemp;

	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new Notepad();
	}

}