import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
 
/*dkplus专业搜集和编写实用电脑软件教程，
*搜集各种软件资源和计算机周边，独立制作视频和ppt和音频微信公众号，
*点击进入 dkplus官方博客 （java网络编程http://dkplus.），
*微信搜索dkplus关注公众号可获取海量计算机周边资源。*/
 
public class Login {
 
    private JFrame frame = new JFrame("登录");
    private Container c = frame.getContentPane();
    private JTextField username = new JTextField();
    private JPasswordField password = new JPasswordField();
    private JButton ok = new JButton("确定");
    private JButton cancel = new JButton("取消");
    public Login(){
        frame.setSize(300,200);
        c.setLayout(new BorderLayout());
        initFrame();
        frame.setVisible(true);
    }
 
    private void initFrame() {
         
        //顶部
        JPanel titlePanel = new JPanel();
        titlePanel.setLayout(new FlowLayout());
        titlePanel.add(new JLabel("系统管理员登录"));
        c.add(titlePanel,"North");
         
        //中部表单
        JPanel fieldPanel = new JPanel();
        fieldPanel.setLayout(null);
        JLabel l1 = new JLabel("用户名:");
        l1.setBounds(50, 20, 50, 20);
        JLabel l2 = new JLabel("密    码:");
        l2.setBounds(50, 60, 50, 20);
        fieldPanel.add(l1);
        fieldPanel.add(l2);
        username.setBounds(110,20,120,20);
        password.setBounds(110,60,120,20);
        fieldPanel.add(username);
        fieldPanel.add(password);
        c.add(fieldPanel,"Center");
         
        //底部按钮
        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new FlowLayout());
        buttonPanel.add(ok);
        buttonPanel.add(cancel);
        c.add(buttonPanel,"South");
    }
     
    public static void main(String[] args){
        new Login();
    }
     
}