login.java

这是一个用java做的网络聊天室

package com.chatroom;

import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.Reader;
import java.nio.channels.ReadableByteChannel;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class Login extends JFrame {

	private JPasswordField passwordField;
	private JTextField textField;
	public static Login login;
	private Register register;
	JOptionPane optionPane;

	/**
	 * Launch the application
	 * 
	 * @param args
	 */
	public static void main(String args[]) {
		login = new Login();
		login.setVisible(true);

	}

	/**
	 * Create the frame
	 */
	public Login() {
		super("登录");

		getContentPane().setBackground(Color.PINK);
		getContentPane().setLayout(null);
		setBounds(100, 100, 360, 300);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setResizable(false);

		final JLabel label = new JLabel();
		label.setForeground(Color.BLUE);
		label.setBackground(Color.BLACK);
		label.setText("用户名");
		label.setBounds(66, 74, 120, 30);
		getContentPane().add(label);

		textField = new JTextField();
		textField.setBounds(143, 75, 144, 30);
		getContentPane().add(textField);

		final JLabel label_1 = new JLabel();
		label_1.setForeground(Color.BLUE);
		label_1.setText("密码");
		label_1.setBounds(66, 140, 120, 30);
		getContentPane().add(label_1);

		passwordField = new JPasswordField();
		passwordField.setForeground(Color.RED);
		passwordField.setBounds(143, 141, 144, 30);
		getContentPane().add(passwordField);

		final JButton button = new JButton();
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				/*
				 * int i=0; if (textField.getText().length()==0) {
				 * optionPane.showMessageDialog(null, "用户名不能为空"); } else { i++; }
				 * if (passwordField.getPassword().length==0) {
				 * optionPane.showMessageDialog(null, "密码不能为空"); } else { i++; }
				 */
				try {
					boolean a =true;
					File f = new File("e:\\order.txt");
					FileReader fw = new FileReader(f);
					BufferedReader bw = new BufferedReader(fw);
					for(int i=0;i<register.personNumber;i++){
	
						String readMessage = bw.readLine();
						System.out.println(readMessage);
					}
					//bw.close();
				} catch (Exception e) {
					// TODO: handle exception
					e.printStackTrace();
				}
			}
		});
		button.setBackground(Color.CYAN);
		button.setText("登录");
		button.setBounds(195, 235, 120, 30);
		getContentPane().add(button);

		final JButton button_1 = new JButton();
		button_1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {

				toRegister();

			}
		});
		button_1.setBackground(Color.CYAN);
		button_1.setForeground(Color.BLACK);
		button_1.setText("注册");
		button_1.setBounds(32, 235, 120, 30);
		getContentPane().add(button_1);

		final JLabel label_2 = new JLabel();
		label_2.setBackground(Color.BLACK);
		label_2.setForeground(Color.YELLOW);
		label_2.setFont(new Font("华文行楷", Font.BOLD | Font.ITALIC, 26));
		label_2.setText("                友谊聊天室");
		label_2.setBounds(0, 0, 354, 56);
		getContentPane().add(label_2);

		//
	}

	private void toRegister() {
		// TODO Auto-generated method stub

		if (this.isVisible()) {
			this.setVisible(false);

			register = new Register();
			register.setVisible(true);
		}
	}

}