Java gui框架的第二个功能

Question

我需要帮助我的程序，因为我想把密码和用户名放到我的程序中，所以如果用户名是test＆amp;＆amp;密码是12345我的程序将出现一个新的框架但不幸的是我的第二个没有工作我的标签，按钮等这里是我的代码到目前为止。

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

public class SwapFields extends JFrame

{

    public static void main(String[] args)
    {
        SwapFields frameTabel = new SwapFields();
    }

        JButton blogin = new JButton("Login");
        JPanel panel = new JPanel();
        JTextField txuser = new JTextField(15);
        JPasswordField pass = new JPasswordField(15);
        JLabel lab = new JLabel("Username :");
        JLabel pas = new JLabel("Password :");
        JLabel cos;
        //JPanel panel = new JPanel();
        JButton y1;
        JButton y2;

    SwapFields()
        {
            super("Enter Your Account !");
            setSize(300,200);
            setLocation(500,280);
            panel.setLayout (null);


            txuser.setBounds(90,30,150,20);
            pass.setBounds(90,65,150,20);
            blogin.setBounds(110,100,80,20);
            lab.setBounds(15,28,150,20);
            pas.setBounds(15,63,150,20);

            panel.add(lab);
            panel.add(pas);
            panel.add(blogin);
            panel.add(txuser);
            panel.add(pass);

            getContentPane().add(panel);
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            setVisible(true);
            actionlogin();
        }

            public void actionlogin()
        {
            blogin.addActionListener(new ActionListener()
            {
        public void actionPerformed(ActionEvent ae)
             {
                String puname = txuser.getText();
                String ppaswd = pass.getText();
                if(puname.equals("test") && ppaswd.equals("12345"))
            {

                JFrame frame = new JFrame("Customer");
                JPanel panel1 = new JPanel();

                frame.setVisible(true);
                frame.setSize(300,200);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


                    cos = new JLabel("Do you have a Customer ?");
                    y1 = new JButton("Yes");
                    y2 = new JButton("No");


                        panel1.setLayout(null);
                        cos.setBounds(70,30,150,20);
                        y1.setBounds(80,65,150,20);
                        y2.setBounds(140,65,150,20);

                        y1.setSize(55,30);
                        y2.setSize(55,30);
                        panel1.add(y1);
                        panel1.add(y2);
                        panel1.add(cos);
                        getContentPane().add(panel1);
//

                    dispose();
            }
            else
                {

                    JOptionPane.showMessageDialog(null,"Wrong Password / Username");
                    txuser.setText("");
                    pass.setText("");
                    txuser.requestFocus();
                }

            }
        });
    }
}

Answer 1

您可以将新控件/面板等添加到原始帧而不是新帧。

getContentPane().add(panel1);

应该可以访问新框架中的内容窗格......

Answer 2

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

public class NewClass extends JFrame

{

    public static void main(String[] args)
    {
        NewClass frameTabel = new NewClass();
    }

        JButton blogin = new JButton("Login");
        JPanel panel = new JPanel();
        JTextField txuser = new JTextField(15);
        JPasswordField pass = new JPasswordField(15);
        JLabel lab = new JLabel("Username :");
        JLabel pas = new JLabel("Password :");
        JLabel cos;
        //JPanel panel = new JPanel();
        JButton y1;
        JButton y2;

    NewClass()
        {
            super("Enter Your Account !");
            setSize(300,200);
            setLocation(500,280);
            panel.setLayout (null);


            txuser.setBounds(90,30,150,20);
            pass.setBounds(90,65,150,20);
            blogin.setBounds(110,100,80,20);
            lab.setBounds(15,28,150,20);
            pas.setBounds(15,63,150,20);

            panel.add(lab);
            panel.add(pas);
            panel.add(blogin);
            panel.add(txuser);
            panel.add(pass);

            getContentPane().add(panel);
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            setVisible(true);
            actionlogin();
        }

            public void actionlogin()
        {
            blogin.addActionListener(new ActionListener()
            {
        public void actionPerformed(ActionEvent ae)
             {
                String puname = txuser.getText();
                String ppaswd = pass.getText();
                if(puname.equals("test") && ppaswd.equals("12345"))
            {

                JFrame frame = new JFrame("Customer");
                JPanel panel1 = new JPanel();

                frame.setVisible(true);
                frame.setSize(300,200);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new GridLayout());

                    cos = new JLabel("Do you have a Customer ?");
                    y1 = new JButton("Yes");
                    y2 = new JButton("No");


                        panel1.setLayout(null);
                        cos.setBounds(70,30,150,20);
                        y1.setBounds(80,65,150,20);
                        y2.setBounds(140,65,150,20);

                        y1.setSize(55,30);
                        y2.setSize(55,30);
                        panel1.add(y1);
                        panel1.add(y2);
                        panel1.add(cos);
//                        panel1.setLayout(new FlowLayout());
//                        getContentPane().add(panel1);
//
                        frame.add(panel1);

                    dispose();
            }
            else
                {

                    JOptionPane.showMessageDialog(null,"Wrong Password / Username");
                    txuser.setText("");
                    pass.setText("");
                    txuser.requestFocus();
                }

            }
        });
    }
}