java - 多个 JPanel 一个在另一个之上

Question

一直在尝试将 4 个 JPanel 制作为两个在顶部，另外 2 个在底部，并相互独立地操作每个输入文本等...java 初学者，所以如果有人可以帮助我解决这个问题会很棒的。我之前发布了另一个问题，但现在我又被困住了。哈哈

package project2;

import javax.swing.JOptionPane;
import java.awt.FlowLayout; // specifies how components are arranged
import javax.swing.JFrame; // provides basic window features
import javax.swing.JLabel; // displays text and images
import javax.swing.JPanel; // Displays a Panel
import javax.swing.SwingConstants; // common constants used with Swing
import javax.swing.Icon; // interface used to manipulate images
import javax.swing.ImageIcon; // loads images
import java.awt.Color;
import java.awt.CardLayout;
import java.awt.BorderLayout;
import javax.swing.*;
import java.awt.Container;
import java.awt.Dimension;

public class GUI 
  {
private JPanel Checks; //Panel to Hold Checks
private JPanel Transactions;
private JPanel History;
private JPanel Graphics;
private JLabel CLabel;

public void displayGUI()
 {
    JFrame frame = new JFrame("GUI");
    frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

    JPanel contentPane = new JPanel(
                        new GridLayout(2, 2, 5, 5));
     contentPane.setBorder(
                BorderFactory.createEmptyBorder(5, 5, 5, 5));

    Checks = getPanel(Color.YELLOW.darker().darker());
    Transactions = getPanel(Color.RED);
    History = getPanel(Color.GREEN.darker().darker());
    Graphics = getPanel(Color.MAGENTA);
    CLabel = new JLabel("Label with on red text");


    contentPane.add(Checks);
    contentPane.add(Transactions);
    contentPane.add(History);
    contentPane.add(Graphics);

    frame.setSize(1400,690); //set frame size
    frame.setVisible(true); //display frame

    frame.setContentPane(contentPane);



     }
     private JPanel getPanel(Color bColor) {
     JPanel panel = new JPanel();

     panel.setOpaque(true);
    panel.setBackground(bColor);

    return panel;
     }

预期输出:

Answer 1

请看一下这个答案，看看您是否需要这个或其他东西。请告诉我们，我们可能会尝试添加更深入的内容。

import java.awt.*;
import java.util.Random;
import javax.swing.*;

/**
 * Created with IntelliJ IDEA.
 * User: Gagandeep Bali
 * Date: 9/30/13
 * Time: 6:02 PM
 * To change this template use File | Settings | File Templates.
 */
public class UTBInCheck {

    private JPanel contentPane;

    private JPanel topLeftPanel;
    private GridBagConstraints gbc;
    private JTextArea infoArea;
    private JScrollPane infoScroller;
    private JTextField payOrderField;
    private JTextField amountField;
    private JButton orderSubmitButton;
    private JButton orderClearButton;
    private JPanel topRightPanel;
    private JTextArea recentTransArea;
    private JScrollPane recentTransScroller;
    private JButton updateButton;
    private JPanel bottomLeftPanel;
    private JTextField atmWithdrawalField;
    private JTextField atmDepositField;
    private JTextField directDepositField;
    private JTextField wireTransferField;
    private JTextField electronicBillField;
    private JTextField bankFeeField;
    private JButton etSubmitButton;
    private JButton etClearButton;
    private JPanel bottomRightPanel;

    private Random random;
    private static final int GAP = 5;
    private int checkNumber;

    public UTBInCheck() {
        random = new Random();
        gbc = new GridBagConstraints();
        gbc.insets = new Insets(GAP, GAP, GAP, GAP);
        checkNumber = 811;
    }

    private void displayGUI() {
        JFrame frame = new JFrame("University of Texas at Brownsville");
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        contentPane = getPanel();
        contentPane.setBorder(
                BorderFactory.createEmptyBorder(GAP, GAP, GAP, GAP));
        contentPane.setLayout(new GridLayout(2, 2, GAP, GAP));
        topLeftPanel = getPanel();
        setTopLeftPanel(topLeftPanel);
        topRightPanel = getPanel();
        setTopRightPanel(topRightPanel);
        bottomLeftPanel = getPanel();
        setBottomLeftPanel(bottomLeftPanel);
        bottomRightPanel = getPanel();

        contentPane.add(topLeftPanel);
        contentPane.add(topRightPanel);
        contentPane.add(bottomLeftPanel);
        contentPane.add(bottomRightPanel);

        frame.setContentPane(contentPane);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    private void setTopLeftPanel(JPanel panel) {
        panel.setBorder(
                BorderFactory.createEmptyBorder(GAP, GAP, GAP, GAP));
        panel.setLayout(new BorderLayout(GAP, GAP));

        JPanel topPanel = getPanel();
        topPanel.setLayout(new GridBagLayout());
        JLabel universityLabel = getLabel("University of Texas at Brownsville");
        addComp(topPanel, universityLabel, 0, 0, 1, 1, 0.5, 0.2,
                GridBagConstraints.HORIZONTAL, GridBagConstraints.NORTHWEST);
        JLabel checkNumberLabel = getLabel("Check Number : " + checkNumber);
        addComp(topPanel, checkNumberLabel, 1, 0, 1, 1, 0.5, 0.2,
                GridBagConstraints.HORIZONTAL, GridBagConstraints.NORTHEAST);

        infoArea = new JTextArea(5, 10);
        infoArea.setLineWrap(true);
        infoArea.setWrapStyleWord(true);
        infoScroller = new JScrollPane();
        infoScroller.setViewportView(infoArea);
        addComp(topPanel, infoScroller, 0, 1, 2, 1, 1.0, 0.4,
                GridBagConstraints.BOTH, GridBagConstraints.WEST);

        JPanel centerPanel = getPanel();
        centerPanel.setBorder(
                BorderFactory.createEmptyBorder(GAP, GAP, GAP, GAP));
        centerPanel.setLayout(new GridLayout(0, 2, GAP, GAP));
        JLabel payOrderLabel = getLabel("Pay to the order of : ");
        payOrderField = new JTextField(10);
        JLabel amountLabel = getLabel("Amount : ");
        amountField = new JTextField(10);
        JLabel chrisBankLabel = getLabel("Cris' Bank");
        JPanel buttonPanel = getPanel();
        buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER, GAP, GAP));
        orderSubmitButton = new JButton("Submit");
        orderClearButton = new JButton("Clear");
        buttonPanel.add(orderSubmitButton);
        buttonPanel.add(orderClearButton);

        centerPanel.add(payOrderLabel);
        centerPanel.add(payOrderField);
        centerPanel.add(amountLabel);
        centerPanel.add(amountField);
        centerPanel.add(chrisBankLabel);
        centerPanel.add(buttonPanel);

        addComp(topPanel, centerPanel, 0, 2, 2, 1, 1.0, 0.4,
                GridBagConstraints.BOTH, GridBagConstraints.SOUTHWEST);

        panel.add(topPanel, BorderLayout.CENTER);
    }

    private void addComp(JPanel panel, JComponent comp,
                         int gridx, int gridy, int gridwidth, int gridheight,
                         double weightx, double weighty, int fill, int anchor) {
        gbc.gridx = gridx;
        gbc.gridy = gridy;
        gbc.gridwidth = gridwidth;
        gbc.gridheight = gridheight;
        gbc.weightx = weightx;
        gbc.weighty = weighty;
        gbc.fill = fill;
        gbc.anchor = anchor;

        panel.add(comp, gbc);
    }

    private void setTopRightPanel(JPanel panel) {
        panel.setBorder(BorderFactory.createTitledBorder("Recent Transactions"));
        panel.setLayout(new BorderLayout(GAP, GAP));

        recentTransArea = new JTextArea(10, 10);
        recentTransArea.setLineWrap(true);
        recentTransArea.setWrapStyleWord(true);
        recentTransScroller = new JScrollPane();
        recentTransScroller.setViewportView(recentTransArea);

        JPanel buttonPanel = getPanel();
        updateButton = new JButton("Update");
        buttonPanel.add(updateButton);

        panel.add(recentTransScroller, BorderLayout.CENTER);
        panel.add(buttonPanel, BorderLayout.PAGE_END);
    }

    private void setBottomLeftPanel(JPanel panel) {
        panel.setBorder(
                BorderFactory.createTitledBorder("Electronic Transactions"));
        panel.setLayout(new GridLayout(0, 2, GAP, GAP));

        JLabel atmWithdrawLabel = getLabel("ATM Withdrawals : ");
        atmWithdrawalField = new JTextField(10);
        JLabel atmdepositLabel = getLabel("ATM Deposit : ");
        atmDepositField = new JTextField(10);
        JLabel directDepositLabel = getLabel("Direct Deposit : ");
        directDepositField = new JTextField(10);
        JLabel wireTransferLabel = getLabel("Wire Transfers : ");
        wireTransferField = new JTextField(10);
        JLabel electronicBillLabel = getLabel("Electronic Bills : ");
        electronicBillField = new JTextField(10);
        JLabel bankFeeLabel = getLabel("Bank Fees : ");
        bankFeeField = new JTextField(10);

        JPanel buttonPanel = getPanel();
        buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER, GAP, GAP));
        etSubmitButton = new JButton("Submit");
        etClearButton = new JButton("Clear");
        buttonPanel.add(etSubmitButton);
        buttonPanel.add(etClearButton);

        panel.add(atmWithdrawLabel);
        panel.add(atmWithdrawalField);
        panel.add(atmdepositLabel);
        panel.add(atmDepositField);
        panel.add(directDepositLabel);
        panel.add(directDepositField);
        panel.add(wireTransferLabel);
        panel.add(wireTransferField);
        panel.add(electronicBillLabel);
        panel.add(electronicBillField);
        panel.add(bankFeeLabel);
        panel.add(bankFeeField);
        //Adding JPanel just to occupy space;
        panel.add(getPanel());
        panel.add(buttonPanel);
    }

    private JLabel getLabel(String text) {
        return (new JLabel(text, JLabel.LEFT));
    }

    private JPanel getPanel() {
        JPanel panel = new JPanel();
        panel.setOpaque(true);
        panel.setBackground(getRandomColor());
        /*panel.setBorder(
                BorderFactory.createEmptyBorder(GAP, GAP, GAP, GAP));*/

        return panel;
    }

    private Color getRandomColor() {
        return (new Color(random.nextInt(256),
                          random.nextInt(256), random.nextInt(256)));
    }

    public static void main(String[] args) {
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                new UTBInCheck().displayGUI();
            }
        };
        EventQueue.invokeLater(runnable);
    }
}

输出: