login.java

Appplet自己写的一些小程序,对新手很有帮助可以

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;

public class login extends JApplet implements ActionListener
{
	JLabel labeluserName;
	JLabel labelPassword;	
	
	JTextField textName;
	JPasswordField textPassword;
	JButton okButton;
	
	Date date;
	GregorianCalendar gCal;

	public void init()
	{

		CreateApplet();
	}


	public void CreateApplet()
	{
		Container content;
		content = getContentPane();
		content.setLayout(new FlowLayout());		


		labeluserName = new JLabel("User Name:");
		textName = new JTextField(10);
		labelPassword = new JLabel("Password:");
		textPassword = new JPasswordField(10);
		okButton = new JButton("OK");

		content.add(labeluserName);
		content.add(textName);
		content.add(labelPassword);
		content.add(textPassword);
		content.add(okButton);

		okButton.addActionListener(this);

	}

	public void actionPerformed(ActionEvent evt)
	{
		Object obj = evt.getSource();
			
		if(obj == okButton)
		{
			date = new Date();
			gCal = new GregorianCalendar();
			gCal.setTime(date);			
			
			char pwd[]=textPassword.getPassword();
			
            String entry = "User: "+ textName.getText()+ 
            "Logged in:"+gCal.get(Calendar.HOUR)+":"+gCal.get(Calendar.MINUTE)+
            "Date:"+gCal.get(Calendar.YEAR)+"/"+gCal.get(Calendar.MONTH)+"/"+gCal.get(Calendar.DATE)+
            "PWD: "+new String(pwd);
			
			try
			{
				RandomAccessFile logFile = new 	RandomAccessFile("d:\\customer.txt","rw");
				logFile.seek(logFile.length());
				logFile.writeBytes(entry);
			}
			catch(IOException e)
			{
				showStatus("Cannot write on to the log 	file"+e);		
			}				
		}

	}
	
	public static void main(String arg[])
	{
		login b=new login();
		b.CreateApplet();
	}
	

}