Java swingのウィンドウにテキストの行を追加するには？

Question

ユーザーインターフェイスといくつかの白いボックスを作成するJavaクラスがありますが、ボックスについて数行のテキストを入れたいと思います。私はSystem.out.println("Please select an Area or a Type Of Model from the drop down menus");を試しましたが、それは動作しません。私が持っているコードは、私は何を入れたいのは、人々がそれを使用したい場合は、その後、彼らはすべての時間を言われずに何をすべきか知っていることをいくつかの命令である

import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.KeyEvent; 

import javax.swing.JFrame; 
import javax.swing.JMenu; 
import javax.swing.JMenuBar; 
import javax.swing.JMenuItem; 
import javax.swing.JPanel; 

class MenuActionListener implements ActionListener { 
    public void actionPerformed(ActionEvent e) { 
     System.out.println("Selected: " + e.getActionCommand()); 
    } 
} 

public class testone{  

    public static void main(final String args[]) { 
     JFrame frame = new JFrame("test"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     JMenuBar menuBar = new JMenuBar(); 


     // File Menu, F - Mnemonic 
     JMenu fileMenu = new JMenu("Areas"); 
     fileMenu.setMnemonic(KeyEvent.VK_F); 
     menuBar.add(fileMenu); 

     // File->New, N - Mnemonic 
     JMenuItem newMenuItem = new JMenuItem("A1"); 
     newMenuItem.addActionListener(new MenuActionListener()); 
     fileMenu.add(newMenuItem); 

     newMenuItem = new JMenuItem("A2"); 
     newMenuItem.addActionListener(new MenuActionListener()); 
     fileMenu.add(newMenuItem); 

     newMenuItem = new JMenuItem("A3"); 
     newMenuItem.addActionListener(new MenuActionListener()); 
     fileMenu.add(newMenuItem); 

     fileMenu = new JMenu("Types Of Models"); 
     fileMenu.setMnemonic(KeyEvent.VK_F); 
     menuBar.add(fileMenu); 

     newMenuItem = new JMenuItem("T1"); 
     newMenuItem.addActionListener(new MenuActionListener()); 
     fileMenu.add(newMenuItem); 

     newMenuItem = new JMenuItem("T2"); 
     newMenuItem.addActionListener(new MenuActionListener()); 
     fileMenu.add(newMenuItem); 

     newMenuItem = new JMenuItem("T3"); 
     newMenuItem.addActionListener(new MenuActionListener()); 
     fileMenu.add(newMenuItem); 



     frame.setJMenuBar(menuBar); 
     frame.setSize(1200, 650); 
     frame.setVisible(true); 

     // Set up subpanels 
     JPanel subPanel1 = new JPanel(); 
     subPanel1.setPreferredSize (new Dimension(135, 135)); 
     subPanel1.setBackground (Color.white); 

     JPanel subPanel2 = new JPanel(); 
     subPanel2.setPreferredSize (new Dimension(135, 135)); 
     subPanel2.setBackground (Color.white); 

     JPanel subPanel3 = new JPanel(); 
     subPanel3.setPreferredSize (new Dimension (135, 135)); 
     subPanel3.setBackground(Color.white); 

     JPanel subPanel4 = new JPanel(); 
     subPanel4.setPreferredSize (new Dimension (135, 135)); 
     subPanel4.setBackground(Color.white); 

     JPanel subPanel5 = new JPanel(); 
     subPanel5.setPreferredSize (new Dimension (135, 135)); 
     subPanel5.setBackground(Color.white); 

     JPanel subPanel6 = new JPanel(); 
     subPanel6.setPreferredSize (new Dimension (135, 135)); 
     subPanel6.setBackground(Color.white); 

     JPanel subPanel7 = new JPanel(); 
     subPanel7.setPreferredSize (new Dimension (135, 135)); 
     subPanel7.setBackground(Color.white); 

     JPanel subPanel8 = new JPanel(); 
     subPanel8.setPreferredSize (new Dimension (135, 135)); 
     subPanel8.setBackground(Color.white); 

     JPanel subPanel9 = new JPanel(); 
     subPanel9.setPreferredSize (new Dimension (135, 135)); 
     subPanel9.setBackground(Color.white); 

     JPanel subPanel10 = new JPanel(); 
     subPanel10.setPreferredSize (new Dimension (135, 135)); 
     subPanel10.setBackground(Color.white); 

     JPanel subPanel11 = new JPanel(); 
     subPanel11.setPreferredSize (new Dimension (135, 135)); 
     subPanel11.setBackground(Color.white); 

     JPanel subPanel12 = new JPanel(); 
     subPanel12.setPreferredSize (new Dimension (135, 135)); 
     subPanel12.setBackground(Color.white); 

     JPanel subPanel13 = new JPanel(); 
     subPanel13.setPreferredSize (new Dimension (135, 135)); 
     subPanel13.setBackground(Color.white); 

     JPanel subPanel14 = new JPanel(); 
     subPanel14.setPreferredSize (new Dimension (135, 135)); 
     subPanel14.setBackground(Color.white); 

     JPanel subPanel15 = new JPanel(); 
     subPanel15.setPreferredSize (new Dimension (135, 135)); 
     subPanel15.setBackground(Color.white); 

     JPanel subPanel16 = new JPanel(); 
     subPanel16.setPreferredSize (new Dimension (135, 135)); 
     subPanel16.setBackground(Color.white); 

     JPanel subPanel17 = new JPanel(); 
     subPanel17.setPreferredSize (new Dimension (135, 135)); 
     subPanel17.setBackground(Color.white); 

     JPanel subPanel18 = new JPanel(); 
     subPanel18.setPreferredSize (new Dimension (135, 135)); 
     subPanel18.setBackground(Color.white); 

     JPanel subPanel19 = new JPanel(); 
     subPanel19.setPreferredSize (new Dimension (135, 135)); 
     subPanel19.setBackground(Color.white); 

     JPanel subPanel20 = new JPanel(); 
     subPanel20.setPreferredSize (new Dimension (135, 135)); 
     subPanel20.setBackground(Color.white); 

     JPanel subPanel21 = new JPanel(); 
     subPanel21.setPreferredSize (new Dimension (135, 135)); 
     subPanel21.setBackground(Color.white); 

     JPanel subPanel22 = new JPanel(); 
     subPanel22.setPreferredSize (new Dimension (135, 135)); 
     subPanel22.setBackground(Color.white); 

     JPanel subPanel23 = new JPanel(); 
     subPanel23.setPreferredSize (new Dimension (135, 135)); 
     subPanel23.setBackground(Color.white); 

     JPanel subPanel24 = new JPanel(); 
     subPanel24.setPreferredSize (new Dimension (135, 135)); 
     subPanel24.setBackground(Color.white); 

     JPanel subPanel25 = new JPanel(); 
     subPanel25.setPreferredSize (new Dimension (135, 135)); 
     subPanel25.setBackground(Color.white); 

     JPanel subPanel26 = new JPanel(); 
     subPanel26.setPreferredSize (new Dimension (135, 135)); 
     subPanel26.setBackground(Color.white); 

     JPanel subPanel27 = new JPanel(); 
     subPanel27.setPreferredSize (new Dimension (135, 135)); 
     subPanel27.setBackground(Color.white); 

     JPanel subPanel28 = new JPanel(); 
     subPanel28.setPreferredSize (new Dimension (135, 135)); 
     subPanel28.setBackground(Color.white); 

     JPanel subPanel29 = new JPanel(); 
     subPanel29.setPreferredSize (new Dimension (135, 135)); 
     subPanel29.setBackground(Color.white); 

     JPanel subPanel30 = new JPanel(); 
     subPanel30.setPreferredSize (new Dimension (135, 135)); 
     subPanel30.setBackground(Color.white); 

     JPanel subPanel31 = new JPanel(); 
     subPanel31.setPreferredSize (new Dimension (135, 135)); 
     subPanel31.setBackground(Color.white); 

     JPanel subPanel32 = new JPanel(); 
     subPanel32.setPreferredSize (new Dimension (135, 135)); 
     subPanel32.setBackground(Color.white); 

     JPanel subPanel33 = new JPanel(); 
     subPanel33.setPreferredSize (new Dimension (135, 135)); 
     subPanel33.setBackground(Color.white); 

     JPanel subPanel34 = new JPanel(); 
     subPanel34.setPreferredSize (new Dimension (135, 135)); 
     subPanel34.setBackground(Color.white); 

     JPanel subPanel35 = new JPanel(); 
     subPanel35.setPreferredSize (new Dimension (135, 135)); 
     subPanel35.setBackground(Color.white); 

     JPanel subPanel36 = new JPanel(); 
     subPanel36.setPreferredSize (new Dimension (135, 135)); 
     subPanel36.setBackground(Color.white); 

     // Set up primary panel 
     JPanel primary = new JPanel(); 
     primary.setBackground (Color.lightGray); 
     primary.add (subPanel1); 
     primary.add (subPanel2); 
     primary.add (subPanel3); 
     primary.add (subPanel4); 
     primary.add (subPanel5); 
     primary.add (subPanel6); 
     primary.add (subPanel7); 
     primary.add (subPanel8); 
     primary.add (subPanel9); 
     primary.add (subPanel10); 
     primary.add (subPanel11); 
     primary.add (subPanel12); 
     primary.add (subPanel13); 
     primary.add (subPanel14); 
     primary.add (subPanel15); 
     primary.add (subPanel16); 
     primary.add (subPanel17); 
     primary.add (subPanel18); 
     primary.add (subPanel19); 
     primary.add (subPanel20); 
     primary.add (subPanel21); 
     primary.add (subPanel22); 
     primary.add (subPanel23); 
     primary.add (subPanel24); 
     primary.add (subPanel25); 
     primary.add (subPanel26); 
     primary.add (subPanel27); 
     primary.add (subPanel28); 
     primary.add (subPanel29); 
     primary.add (subPanel30); 
     primary.add (subPanel31); 
     primary.add (subPanel32); 
     primary.add (subPanel33); 
     primary.add (subPanel34); 
     primary.add (subPanel35); 
     primary.add (subPanel36); 

     frame.getContentPane().add(primary); 
     frame.pack(); 
     frame.setVisible(true); 
    } 
} 

です。

Answer 1

私は窓にJLabelを追加することをお勧めします

ボックスに関するテキストの数行を載せていきたいと思います。

最後のサブパネルprimary.add(subPanel36);を追加した後、あなたのコードにこれを追加します。

JPanel container = new JPanel(); 
JLabel lblAboutBoxes = new JLabel("Please select an Area or a Type Of Model from the drop down menus"); 
lblAboutBoxes.setHorizontalAlignment(JLabel.CENTER); 
lblAboutBoxes.setFont(new Font("Courier New", Font.BOLD, 22)); 
container.setLayout(new BoxLayout(container, BoxLayout.Y_AXIS)); 
container.add(lblAboutBoxes); 
container.add(primary); 

をそして

frame.getContentPane().add(container); 

出力によって

frame.getContentPane().add(primary); 

を置き換える：