70965702595d001d1b41d4c2575fd2cc

里面所含源码是本人平时做程序的一些实例

package notepad;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.util.*;;
//import java.net.URL;
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;
	//初始化table

	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(c.getTimeInMillis() );
		//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();
	}

}