package chapter14;
import javax.swing.*;
public class LoginDemo extends JFrame
{
	//聲明組件
	JLabel lblTitle,lblUser,lblPass;
	JTextField txtUser;
	JPasswordField pwdPass;
	JButton btnLogin,btnExit;
	JPanel pnlMain;
	//構造方法
	public LoginDemo()
	{
		//調用父類構造函數
		super("用戶登錄");
		pnlMain=new JPanel();
		//設置JFrame的容器為pnlMain
		this.getContentPane().add(pnlMain);
		//實例化組件
		lblTitle=new JLabel(new ImageIcon("welcome.gif"));
		lblUser=new JLabel("用戶名:");
		txtUser=new JTextField(12);
		lblPass=new JLabel("密碼:");
		pwdPass=new JPasswordField(12);
		//"登錄"按鈕
		Icon imgLogin=new ImageIcon("login.gif");
		btnLogin=new JButton("登錄(L)",imgLogin);
		btnLogin.setMnemonic('L');
		btnLogin.setToolTipText("點擊登錄");
		//"退出"按鈕
		Icon imgExit=new ImageIcon("exit.gif");
		btnExit=new JButton("退出(X)",imgExit);
		btnExit.setMnemonic('X');
		btnExit.setToolTipText("退出登錄");
		//添加組件到面板
		pnlMain.add(lblTitle);
		pnlMain.add(lblUser);
		pnlMain.add(txtUser);
		pnlMain.add(lblPass);
		pnlMain.add(pwdPass);
		pnlMain.add(btnLogin);
		pnlMain.add(btnExit);
		//設置窗口屬性
		setSize(225,200);
		setResizable(false);
		setVisible(true);		
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	//主方法 
	public static void main(String args[])
	{
			new LoginDemo();
	}
}