我想要做的是在框架内组织五个单独的 JPanel。输出应该是这样的： 顶部会有一个面板。顶部面板正下方的两个面板垂直分割空间，然后另外两个面板水平分割剩余空间。
我无法弄清楚如何组织如上所述的面板，我认为这是因为我只是不知道正确的语法。因此，非常感谢您提供的任何帮助或建议，这是我迄今为止所拥有的代码。
import java.lang.String.*;
import java.lang.Exception.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Display extends JFrame implements ActionListener{
// instance variables
private static final int FRAME_WIDTH = 400;
private static final int FRAME_HEIGHT = 350;
private static final int FRAME_X_ORIGIN = 150;
private static final int FRAME_Y_ORIGIN = 150;
private static final int BUTTON_WIDTH = 90;
private static final int BUTTON_HEIGHT = 30;
private JButton readFile;
private JButton exit;
private JButton stats;
private JButton blank;
private JCheckBox avgHomeworkScore;
private JCheckBox avgTestScore;
private JCheckBox sdHomeworkScore;
private JCheckBox sdTestScore;
private JRadioButton buttonOne;
private JRadioButton buttonTwo;
private JRadioButton buttonThree;
private JRadioButton buttonFour;
private JPanel header;
private JPanel statistics;
private JPanel courses;
private JPanel display;
private JPanel action;
public static void main(String[] args){
Display frame = new Display();
frame.setVisible(true);
}
public Display(){
Container contentPane;
//Set the frame properties
setSize (FRAME_WIDTH, FRAME_HEIGHT);
setResizable (false);
setTitle ("CSCE155A Course Offerings Viewer");
setLocation (FRAME_X_ORIGIN, FRAME_Y_ORIGIN);
contentPane = getContentPane();
contentPane.setLayout(new GridLayout());
contentPane.setBackground( Color.white );
//header
//Create and Place the Buttons on the frame
readFile = new JButton("Read File");
readFile.setBounds(4, 285, BUTTON_WIDTH, BUTTON_HEIGHT);
exit = new JButton("Exit");
exit.setBounds(100, 285, BUTTON_WIDTH, BUTTON_HEIGHT);
stats = new JButton("Stats");
stats.setBounds(195, 285, BUTTON_WIDTH, BUTTON_HEIGHT);
blank = new JButton("Clear");
blank.setBounds(290, 285, BUTTON_WIDTH, BUTTON_HEIGHT);
action = new JPanel(new FlowLayout());
action.setBackground(Color.blue);
action.add(readFile);
action.add(exit);
action.add(stats);
action.add(blank);
contentPane.add(action);
//Register this frame as an Action listener of the buttons
readFile.addActionListener(this);
exit.addActionListener(this);
stats.addActionListener(this);
blank.addActionListener(this);
//Create and Place the checkboxes on the frame
avgHomeworkScore = new JCheckBox();
avgHomeworkScore.setMnemonic(KeyEvent.VK_H);
contentPane.add(avgHomeworkScore);
avgHomeworkScore.setSelected(true);
avgTestScore = new JCheckBox();
avgTestScore.setMnemonic(KeyEvent.VK_T);
avgTestScore.setSelected(true);
sdHomeworkScore = new JCheckBox();
sdHomeworkScore.setMnemonic(KeyEvent.VK_S);
sdHomeworkScore.setSelected(true);
sdTestScore = new JCheckBox();
sdTestScore.setMnemonic(KeyEvent.VK_D);
sdTestScore.setSelected(true);
statistics = new JPanel(new GridLayout(0,1));
contentPane.add(statistics);
statistics.add(avgHomeworkScore);
statistics.add(avgTestScore);
statistics.add(sdHomeworkScore);
statistics.add(sdTestScore);
avgHomeworkScore.addActionListener(this);
avgTestScore.addActionListener(this);
sdHomeworkScore.addActionListener(this);
sdTestScore.addActionListener(this);
//create the radio buttons
buttonOne = new JRadioButton();
buttonOne.setMnemonic(KeyEvent.VK_1);
buttonOne.setSelected(true);
buttonTwo = new JRadioButton();
buttonTwo.setMnemonic(KeyEvent.VK_2);
buttonThree = new JRadioButton();
buttonThree.setMnemonic(KeyEvent.VK_3);
buttonFour = new JRadioButton();
buttonFour.setMnemonic(KeyEvent.VK_4);
ButtonGroup group = new ButtonGroup();
group.add(buttonOne);
group.add(buttonTwo);
group.add(buttonThree);
group.add(buttonFour);
buttonOne.addActionListener(this);
buttonTwo.addActionListener(this);
buttonThree.addActionListener(this);
buttonFour.addActionListener(this);
courses = new JPanel(new GridLayout(0,1));
courses.setBackground(Color.blue);
courses.add(buttonOne);
courses.add(buttonTwo);
courses.add(buttonThree);
courses.add(buttonFour);
contentPane.add(courses);
//Exit program when the viewer is closed
setDefaultCloseOperation(EXIT_ON_CLOSE);
}