login.java

里面所含源码是本人平时做程序的一些实例

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class Login extends JFrame{
	JPanel pnlLogin;
	JButton btnLogin,btnRegister,btnExit;
	JLabel lblServer,lblUserName,lblPassword,lblLogo;
	JTextField txtUserName,txtServer;
	JPasswordField pwdPassword;
	Dimension scrnsize;
	Toolkit toolkit=Toolkit.getDefaultToolkit();
	public Login(){
		super("登录[HappyChat]聊天室");
		pnlLogin=new JPanel();
		this.getContentPane().add(pnlLogin);
		lblServer=new JLabel("服务器(S):");
		lblUserName=new JLabel("用户名(U):");
		lblPassword=new JLabel("口令(P):");
		txtServer=new JTextField("127.0.0.1");
		txtUserName=new JTextField(20);
		pwdPassword=new JPasswordField(20);
		btnLogin=new JButton("登录(L)");
		btnLogin.setToolTipText("登录到服务器");
		btnLogin.setMnemonic('L');
		btnRegister=new JButton("注册(R)");
		btnRegister.setToolTipText("注册新用户");
		btnRegister.setMnemonic('R');
		btnExit=new JButton("退出(X)");
		btnExit.setToolTipText("退出系统");
		btnExit.setMnemonic('X');
		pnlLogin.setLayout(null);
		pnlLogin.setBackground(new Color(52,130,203));
		lblServer.setBounds(50,100,100,30);
		txtServer.setBounds(50,130,100,30);
		lblUserName.setBounds(150,130,100,30);
		txtUserName.setBounds(150,130,120,25);
		lblPassword.setBounds(50,160,100,30);
		pwdPassword.setBounds(150,160,100,30);
		btnLogin.setBounds(50,200,80,25);
		btnRegister.setBounds(130,200,80,25);
		btnExit.setBounds(210,200,80,25);
		Font fontstr=new Font("宋体",Font.PLAIN,12);
		lblServer.setFont(fontstr);
		txtServer.setFont(fontstr);
		lblUserName.setFont(fontstr);
		txtUserName.setFont(fontstr);
		lblPassword.setFont(fontstr);
		pwdPassword.setFont(fontstr);
		btnLogin.setFont(fontstr);
		btnRegister.setFont(fontstr);
		btnExit.setFont(fontstr);
		lblUserName.setForeground(Color.BLACK);
		lblPassword.setForeground(Color.BLACK);
		btnLogin.setBackground(Color.ORANGE);
		btnRegister.setBackground(Color.ORANGE);
		btnExit.setBackground(Color.ORANGE);
		pnlLogin.add(lblServer);
		pnlLogin.add(txtServer);
		pnlLogin.add(lblUserName);
		pnlLogin.add(txtUserName);
		pnlLogin.add(lblPassword);
		pnlLogin.add(pwdPassword);
		pnlLogin.add(btnLogin);
		pnlLogin.add(btnRegister);
		pnlLogin.add(btnExit);
		Icon logo1=new ImageIcon("loginlogo.jpg");
		//lblLogo=new JLabel(logol);
		//lblLogo.setBounds(0,0,340,66);
		pnlLogin.add(lblLogo);
		setResizable(false);
		setSize(340,260);
		setVisible(true);
		scrnsize=toolkit.getScreenSize();
		setLocation(scrnsize.width/2-this.getWidth()/2,scrnsize.height/2-this.getHeight()/2);
		Image img=toolkit.getImage("appico.jpg");
		setIconImage(img);
	}
	public static void main(String args[]){
		new Login();
	}
}