完成用户登陆

package GUI;

        import javax.swing.*;
        import java.awt.*;
        import java.awt.event.ActionEvent;
        import java.awt.event.ActionListener;




public class LoginUI {


    public JFrame jf;
    public JPanel jp;
    public JLabel jLabel1;
    public JLabel jLabel2;
    public JLabel jLabel3;
    public JTextField jUserName;
    public JPasswordField jPassWord;
    public JButton post;
    public JButton reset;

    public LoginUI() {

        jf = new JFrame("Login");
        jf.setSize(400, 175);
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        jf.setLocationRelativeTo(null);
        jf.setResizable(false);

        jp = new JPanel(new FlowLayout());

        jLabel1 = new JLabel();
        jLabel1.setText("Account :   ");
        jLabel1.setFont(new Font(null, Font.PLAIN, 18));

        jLabel2 =new JLabel();
        jLabel2.setText("Password : ");
        jLabel2.setFont(new Font(null, Font.PLAIN, 18));

        jLabel3 =new JLabel();
        jLabel3.setText("Please input your account and password");
        jLabel3.setFont(new Font(null, Font.PLAIN, 18));

        jUserName = new JTextField(16);
        jUserName.setFont(new Font(null, Font.PLAIN, 18));

        jPassWord = new JPasswordField(16);
        jPassWord.setFont(new Font(null, Font.PLAIN, 18));

        post = new JButton(" L o g i n ");
        post.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                String account = new String(jUserName.getText());
                String psw =  new String(jPassWord.getPassword());
                if(account.equals("silver") && psw.equals("moon")){
                    jLabel3.setText("Login successful (｡･ω･｡)ﾉ♡");
                }else{
                    jLabel3.setText("Account or password input error");
                }
            }
        });

        reset = new JButton(" R e s e t ");
        reset.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                jUserName.setText("");
                jPassWord.setText("");
            }
        });


        jp.add(jLabel1);
        jp.add(jUserName);
        jp.add(jLabel2);
        jp.add(jPassWord);
        jp.add(post);
        jp.add(reset);
        jp.add(jLabel3);

        jf.setContentPane(jp);
        jf.setVisible(true);

    }

    public static void main (String[] args){

        new LoginUI();

    }



`}
`

这次作业和上周的作业有点像, 就只是加了个if, 比较简单, 就不加注释了