使用每个选项卡作为单独的类在JFrame中的选项卡中显示JPanel及其组件

Question

我需要一些帮助。我正在尝试创建JFrame以包含标签，每个标签都会显示一个面板。每个面板都包含按钮和Textfields。面板应在每个选项卡上显示单独的类，但面板显示没有按钮和Textfields。任何帮助将不胜感激。

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

public class CELTool extends JFrame implements ActionListener {

   JTabbedPane tab;

   public CELTool() {
      JFrame frame = new JFrame("CELTool");
      tab = new JTabbedPane();
      frame.add(tab, BorderLayout.CENTER);

      Illustration etool = new Illustration();
      tab.add("Illustration", etool);

      Encrypt crypt = new Encrypt();
      tab.add("Crypt", crypt);

      Decrypt decrypt = new Decrypt();

      tab.add("Decrypt", decrypt);

      frame.setSize(500, 750);
      frame.pack();
      frame.setVisible(true);
      frame.setDefaultCloseOperation(EXIT_ON_CLOSE);

   }

   public void actionPerformed(ActionEvent ae) {
   }

   public static void main(String[] args) {
      CELTool clt = new CELTool();//        
      clt.setSize(400,500);     
      clt.setVisible(true);
   }
}

class Illustration extends JPanel {

   static String[] strPlaintext = {"Original Input", "InitialPermutation", "First RIound ", "Second Round",
                                   "Third Round", "Fourth Round", "Fifth Round", "Sixth Round", "Seventh Round",
                                   "Eight Round", "Ninth Round", "Tenth Round", "Eleventh Round", "Twelveth Round",
                                   "Thirteenth Round", "Fourtheenth Round", "Fithteenth Round", "Sixtheenth Round",
                                   "Final Round", "Ciphertext"};
   static String[] str2 = {"Key", "Round Sixteen", "Round Fithteen", "Round Fourteen", "Round Thirteen", "Round Twelve",
                           "Round Eleven", "Round Ten",};
   int leading, ascent, height, width;
   int leading2, ascent2, height2, width2;
   int xcoord = 40, ycoord = 100, xcoord2 = 600, ycoord2 = 60;
   static final int BORDER = 5;

   public void paint(Graphics gr) {
      super.paint(gr);
      int i = 0, xcoord = 40, ycoord = 100, xcoord2 = 600, ycoord2 = 60;


      leading = gr.getFontMetrics().getLeading();
      ascent = gr.getFontMetrics().getAscent();
      height = gr.getFontMetrics().getHeight();
      width = gr.getFontMetrics().stringWidth(strPlaintext[i]);

      for (i = 0; i < strPlaintext.length; i++) {
         gr.drawString(strPlaintext[i], xcoord, ycoord);
         leading = gr.getFontMetrics().getLeading();
         ascent = gr.getFontMetrics().getAscent();
         height = gr.getFontMetrics().getHeight();
         width = gr.getFontMetrics().stringWidth(strPlaintext[i]);
         gr.drawRect(xcoord - BORDER, ycoord - (ascent + leading + BORDER), width + 2 * BORDER, height + 2 * BORDER);
         ycoord += 40;

      }

   }
}

class Encrypt extends JPanel {

   public Encrypt() {
      JPanel panel5 = new JPanel();
      panel5.setLayout(new GridBagLayout());    //panel5.setLayout((LayoutManager) new GridBagConstraints());

      GridBagConstraints gbc = new GridBagConstraints();
      gbc.gridx = 0;
      gbc.gridy = 0;
      panel5.add(new JLabel("Input plaintext text"), gbc);

      gbc.gridx = 1;
      gbc.gridy = 0;
      panel5.add(new JTextField("0123456789ABCDEF", 20), gbc);

      gbc.gridx = 0;
      gbc.gridy = 2;
      panel5.add(new JLabel("Input text in Hex"), gbc);

      gbc.gridx = 1;
      gbc.gridy = 2;
      panel5.add(new JTextField("0123456789ABCDEF", 20), gbc);

      panel5.setSize(200, 300);
      panel5.setVisible(true);
   }
}

class Decrypt extends JPanel {

   JPanel decPanel;
   JTextField dectxt;

   public Decrypt() {
      decPanel = new JPanel();
      decPanel.add(new JLabel("Cipher"));
      decPanel.add(new JTextField());
      decPanel.add(new JLabel("key"));
      decPanel.add(new JTextField());
      decPanel.add(new JLabel("Plaintext"));
      decPanel.add(new JTextField());
      decPanel.add(new JButton("Decrypt"));
      decPanel.add(new JButton("Reset"));
      decPanel.validate();

   }
}

Answer 1

这根本不是一个完整的解决方案，但至少可以让你朝着正确的方向前进。仔细比较它与您的代码，看看差异。希望这会有所帮助。

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

public class CELTool extends JFrame implements ActionListener {

   JTabbedPane tab;
   Illustration etool;
   Encrypt encrypt;
   Decrypt decrypt;

   private CELTool() {
      super("CELTool");

      tab = new JTabbedPane();
      etool = new Illustration();
      encrypt = new Encrypt();
      decrypt = new Decrypt();

      tab.add("Illustration", etool);
      tab.add("Crypt", encrypt);
      tab.add("Decrypt", decrypt);
      this.add(tab, BorderLayout.CENTER);

      this.setDefaultCloseOperation(EXIT_ON_CLOSE);
      this.setSize(500, 750);
      this.pack();
      this.setLocationRelativeTo(null);
      this.setVisible(true);
   }

   public void actionPerformed(ActionEvent ae) {
      // why blank?
   }

   public static void main(String[] args) {
      new CELTool();      
   }


private class Illustration extends JPanel {

   public Illustration(){

   }

   private final String[] strPlaintext = {"Original Input", "InitialPermutation", "First RIound ", "Second Round",
                                   "Third Round", "Fourth Round", "Fifth Round", "Sixth Round", "Seventh Round",
                                   "Eight Round", "Ninth Round", "Tenth Round", "Eleventh Round", "Twelveth Round",
                                   "Thirteenth Round", "Fourtheenth Round", "Fithteenth Round", "Sixtheenth Round",
                                   "Final Round", "Ciphertext"};
   private final String[] str2 = {"Key", "Round Sixteen", "Round Fithteen", "Round Fourteen", "Round Thirteen", "Round Twelve",
                           "Round Eleven", "Round Ten",};
   int leading, ascent, height, width;
   int xcoord = 40, ycoord = 100, xcoord2 = 600, ycoord2 = 60;
   private final int BORDER = 5;

   public void paintComponent(Graphics gr) {
      super.paintComponent(gr);
      int i = 0, xcoord = 40, ycoord = 100, xcoord2 = 600, ycoord2 = 60;

      leading = gr.getFontMetrics().getLeading();
      ascent = gr.getFontMetrics().getAscent();
      height = gr.getFontMetrics().getHeight();

      for (i = 0; i < strPlaintext.length; i++) {
         gr.drawString(strPlaintext[i], xcoord, ycoord);
         width = gr.getFontMetrics().stringWidth(strPlaintext[i]);
         gr.drawRect(xcoord - BORDER, ycoord - (ascent + leading + BORDER), width + 2 * BORDER, height + 2 * BORDER);
         ycoord += 40;
      }
   }
}

private class Encrypt extends JPanel {

   public Encrypt() {
      this.setLayout(new GridBagLayout());
      GridBagConstraints gbc = new GridBagConstraints();
      gbc.gridx = 0;
      gbc.gridy = 0;
      this.add(new JLabel("Input plaintext text"), gbc);

      gbc.gridx = 1;
      gbc.gridy = 0;
      this.add(new JTextField("0123456789ABCDEF", 20), gbc);

      gbc.gridx = 0;
      gbc.gridy = 2;
      this.add(new JLabel("Input text in Hex"), gbc);

      gbc.gridx = 1;
      gbc.gridy = 2;
      this.add(new JTextField("0123456789ABCDEF", 20), gbc);

      this.setPreferredSize(new Dimension(200, 300));
   }
}

private class Decrypt extends JPanel {

   public Decrypt() {
      this.setLayout(new GridLayout(0,1));
      this.add(new JLabel("Cipher"));
      this.add(new JTextField());
      this.add(new JLabel("key"));
      this.add(new JTextField());
      this.add(new JLabel("Plaintext"));
      this.add(new JTextField());
      this.add(new JButton("Decrypt"));
      this.add(new JButton("Reset"));
      this.validate();
   }
 }
}