向JPanel添加JPanel

Question

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我已经附上了我的代码下面，我的程序的屏幕截图，以及我想要的标签看起来像什么绘图。我需要我的JPanel textPanel出现在标签LLP上的JButtons下面。我曾尝试将textPanel添加到tabsPanel中，但当我这样做时，我的标签就消失了。我需要textPanel在屏幕上伸展并填充LLP选项卡下面的空白处。但我也不希望textPanel出现在其他选项卡上。显示的第一张图片是旧程序的样子。我被要求从头开始做一个更好的程序。我无法在我的屏幕上获得输入输出日志。但正如您所看到的，它显示了我在Port Settings选项中选择的内容。

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import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.TextArea;

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;


public class TestApplication implements ActionListener {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setSize(1000, 1000);
        frame.setTitle("RBA Test Application");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);

        JLabel logLabel = new JLabel("Input/Output Log");

        JButton initialize = new JButton("Initialize");
        JButton connect = new JButton("Connect");
        JButton disconnect = new JButton("Disconnect");
        JButton shutdown = new JButton("Shut Down");
        JButton portsettings = new JButton("Port Settings");
        JButton online = new JButton("Go Online");
        JButton offline = new JButton("Go Offline");
        JButton status = new JButton("Status");
        JButton reboot = new JButton("Reboot");
        JButton account = new JButton("Account");
        JButton amount = new JButton("Amount");
        JButton reset = new JButton("Reset");
        JButton apprvordecl = new JButton("Apprv/Decl");
        JButton test = new JButton("Test Button #1");
        JButton testing = new JButton("Test Button #2");
        JRadioButton button = new JRadioButton("Radio Button");
        JRadioButton button2 = new JRadioButton("Radio Button");
        JCheckBox checkbox = new JCheckBox("Check Box");
        JCheckBox checkbox2 = new JCheckBox("Check Box");

        JPanel testPanel = new JPanel();
         testPanel.add(button);
         testPanel.add(button2);
         testPanel.add(checkbox2);

    JPanel posPanel = new JPanel();
    posPanel.add(test);
    posPanel.add(testing);
    posPanel.add(checkbox);

    JPanel llpPanel = new JPanel();
    llpPanel.add(online);
    llpPanel.add(offline);
    llpPanel.add(status);
    llpPanel.add(reboot);
    llpPanel.add(account);
    llpPanel.add(amount);
    llpPanel.add(reset);
    llpPanel.add(apprvordecl);

    JPanel textPanel = new JPanel(new BorderLayout());
    textPanel.add(logLabel);
    frame.add(logLabel); 

    JPanel buttonPanel = new JPanel();
    buttonPanel.add(initialize);
    buttonPanel.add(connect);
    buttonPanel.add(disconnect);
    buttonPanel.add(shutdown);
    buttonPanel.add(portsettings);
    frame.add(buttonPanel);
    frame.add(buttonPanel, BorderLayout.NORTH);

    JTabbedPane tabbedPane = new JTabbedPane();
    tabbedPane.addTab("LLP", null, llpPanel, "Low Level Protocol");
    tabbedPane.addTab("POS",null, posPanel, "Point Of Sale");
    tabbedPane.addTab("Test", null, testPanel, "Test");

    JPanel tabsPanel = new JPanel(new BorderLayout());
    tabsPanel.add(tabbedPane);
    frame.add(tabsPanel, BorderLayout.CENTER);


    frame.pack();



}

@Override
public void actionPerformed(ActionEvent arg0) {
    // TODO Auto-generated method stub

}






}

Answer 1

你需要另一个嵌套的面板，试试这个：

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;


public class TestApplication implements ActionListener {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
    frame.setSize(1000, 1000);
    frame.setTitle("RBA Test Application");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);

    JLabel logLabel = new JLabel("Input/Output Log");

    JButton initialize = new JButton("Initialize");
    JButton connect = new JButton("Connect");
    JButton disconnect = new JButton("Disconnect");
    JButton shutdown = new JButton("Shut Down");
    JButton portsettings = new JButton("Port Settings");
    JButton online = new JButton("Go Online");
    JButton offline = new JButton("Go Offline");
    JButton status = new JButton("Status");
    JButton reboot = new JButton("Reboot");
    JButton account = new JButton("Account");
    JButton amount = new JButton("Amount");
    JButton reset = new JButton("Reset");
    JButton apprvordecl = new JButton("Apprv/Decl");
    JButton test = new JButton("Test Button #1");
    JButton testing = new JButton("Test Button #2");
    JRadioButton button = new JRadioButton("Radio Button");
    JRadioButton button2 = new JRadioButton("Radio Button");
    JCheckBox checkbox = new JCheckBox("Check Box");
    JCheckBox checkbox2 = new JCheckBox("Check Box");

    JPanel testPanel = new JPanel();
     testPanel.add(button);
     testPanel.add(button2);
     testPanel.add(checkbox2);

JPanel posPanel = new JPanel();
posPanel.add(test);
posPanel.add(testing);
posPanel.add(checkbox);

//CHANGED PART
JPanel llpPanel = new JPanel(new BorderLayout());
JPanel llpbuttonPanel = new JPanel();
llpbuttonPanel.add(online);
llpbuttonPanel.add(offline);
llpbuttonPanel.add(status);
llpbuttonPanel.add(reboot);
llpbuttonPanel.add(account);
llpbuttonPanel.add(amount);
llpbuttonPanel.add(reset);
llpbuttonPanel.add(apprvordecl);
llpPanel.add(llpbuttonPanel, BorderLayout.NORTH);

JPanel textPanel = new JPanel(new BorderLayout());
textPanel.add(logLabel);
llpPanel.add(textPanel, BorderLayout.CENTER);
//END CHANGED PART

JPanel buttonPanel = new JPanel();
buttonPanel.add(initialize);
buttonPanel.add(connect);
buttonPanel.add(disconnect);
buttonPanel.add(shutdown);
buttonPanel.add(portsettings);
frame.add(buttonPanel);
frame.add(buttonPanel, BorderLayout.NORTH);

JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("LLP", null, llpPanel, "Low Level Protocol");
tabbedPane.addTab("POS",null, posPanel, "Point Of Sale");
tabbedPane.addTab("Test", null, testPanel, "Test");

JPanel tabsPanel = new JPanel(new BorderLayout());
tabsPanel.add(tabbedPane);
frame.add(tabsPanel, BorderLayout.CENTER);


frame.pack();



}

@Override
public void actionPerformed(ActionEvent arg0) {
    // TODO Auto-generated method stub

}






}

放入正确的文本区：(您可能希望以不同的方式创建和引用文本区)

    //BEGIN CHANGE
JPanel llpPanel = new JPanel(new BorderLayout());
JPanel llpbuttonPanel = new JPanel();
llpbuttonPanel.add(online);
llpbuttonPanel.add(offline);
llpbuttonPanel.add(status);
llpbuttonPanel.add(reboot);
llpbuttonPanel.add(account);
llpbuttonPanel.add(amount);
llpbuttonPanel.add(reset);
llpbuttonPanel.add(apprvordecl);
llpPanel.add(llpbuttonPanel, BorderLayout.NORTH);

JPanel textPanel = new JPanel(new BorderLayout());
textPanel.add(logLabel, BorderLayout.NORTH);

JTextArea area = new JTextArea();
textPanel.add(area, BorderLayout.CENTER);
llpPanel.add(textPanel, BorderLayout.CENTER);

//END CHANGE

Answer 2

将Swing GUI组合在一起并不能很好地工作。我的建议是通过Oracle Swing Tutorial学习一些你可以在黑客攻击时放在一起的概念。了解可供您使用的Swing组件，并了解Swing布局管理器。尤其是对Swing布局管理器的了解。

这是我生成的GUI。

​

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GUI比乍一看要复杂得多。JPanels内部有很多JPanels。我用了几个FLowLayouts，几个BoxLayouts和一个GridBagLayout。

下面是组成这个图形用户界面的主要JPanels的树形图。

Main JFrame
    Main JPanel
        Communication JPanel
            First Button Row JPanel
            Second Button Row JPanel
        JTabbedPane
            LLP Tab JPanel
                Log JPanel

您应该始终有一个主JPanel来容纳所有其他组件。

这是使用Swing的经验之一。您将开始看到组成GUI各个部分的矩形。

我通常不会在一个类中编写如此复杂的GUI。这一次，我这样做是为了有一个SSCCE可以与这个解释一起发布。

研究代码，了解各种JPanels和Swing组件是如何组合在一起的。

import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextPane;
import javax.swing.SwingUtilities;
import javax.swing.border.Border;

public class RBMTestApplication implements Runnable {

    private static final Insets SPACE_INSETS    = new Insets(10, 10, 4, 10);

    private JFrame              frame;

    private JPanel              mainPanel;
    private JPanel              communicationPanel;
    private JPanel              cPanel1;
    private JPanel              cPanel2;
    private JPanel              llpPanel;

    private JTabbedPane         tabbedPane;

    @Override
    public void run() {
        createFrame();
    }

    private void createFrame() {
        frame = new JFrame();
        frame.setTitle("RBM Test Application");
        frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent event) {
                exitProcedure();
            }
        });
        createMainPanel();
        frame.add(mainPanel);
        frame.pack();
        frame.setVisible(true);
    }

    public void exitProcedure() {
        frame.dispose();
        System.exit(0);
    }

    private void createMainPanel() {
        mainPanel = new JPanel();
        mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
        createCommunicationPanel();
        mainPanel.add(communicationPanel);
        createTabbedPane();
        mainPanel.add(tabbedPane);
    }

    private void createCommunicationPanel() {
        communicationPanel = new JPanel();
        Border border = BorderFactory.createTitledBorder("Communication");
        communicationPanel.setBorder(border);
        communicationPanel.setLayout(new BoxLayout(communicationPanel,
                BoxLayout.Y_AXIS));

        cPanel1 = new JPanel();

        JButton initializeButton = new JButton("Initialize");
        cPanel1.add(initializeButton);

        JButton connectButton = new JButton("Connect");
        cPanel1.add(connectButton);

        JButton disconnectButton = new JButton("Disconnect");
        cPanel1.add(disconnectButton);

        JButton shutdownButton = new JButton("Shutdown");
        cPanel1.add(shutdownButton);

        communicationPanel.add(cPanel1);

        cPanel2 = new JPanel();

        JButton portSettingsButton = new JButton("Port Settings");
        portSettingsButton.setHorizontalAlignment(JButton.CENTER);
        cPanel2.add(portSettingsButton);

        communicationPanel.add(cPanel2);
    }

    private void createTabbedPane() {
        tabbedPane = new JTabbedPane();
        createLLPPanel();
        tabbedPane.addTab("LLP", llpPanel);
        // tabbedPane.addTab("POS", posPanel);
        // tabbedPane.addTab("Tere", terePanel);
    }

    private void createLLPPanel() {
        llpPanel = new JPanel();
        llpPanel.setLayout(new GridBagLayout());

        int gridy = 0;

        JButton goOnlineButton = new JButton("Go online");
        addComponent(llpPanel, goOnlineButton, 0, gridy, 1, 1, SPACE_INSETS,
                GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);

        JButton statusButton = new JButton("Status");
        addComponent(llpPanel, statusButton, 1, gridy, 1, 1, SPACE_INSETS,
                GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);

        JButton pccountButton = new JButton("PC count");
        addComponent(llpPanel, pccountButton, 2, gridy, 1, 1, SPACE_INSETS,
                GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);

        JButton resetButton = new JButton("Reset");
        addComponent(llpPanel, resetButton, 3, gridy++, 1, 1, SPACE_INSETS,
                GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);

        JButton goOfflineButton = new JButton("Go offline");
        addComponent(llpPanel, goOfflineButton, 0, gridy, 1, 1, SPACE_INSETS,
                GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);

        JButton rebootButton = new JButton("Reboot");
        addComponent(llpPanel, rebootButton, 1, gridy, 1, 1, SPACE_INSETS,
                GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);

        JButton amountButton = new JButton("Amount");
        addComponent(llpPanel, amountButton, 2, gridy, 1, 1, SPACE_INSETS,
                GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);

        JButton approveButton = new JButton("Approve / Decline");
        addComponent(llpPanel, approveButton, 3, gridy++, 1, 1, SPACE_INSETS,
                GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);

        JPanel logPanel = new JPanel();
        Border border = BorderFactory.createTitledBorder("Input / output log");
        logPanel.setBorder(border);

        JTextPane textPane = new JTextPane();
        textPane.setEditable(false);

        JScrollPane scrollPane = new JScrollPane(textPane);
        scrollPane.getViewport().setPreferredSize(new Dimension(400, 150));

        logPanel.add(scrollPane);

        addComponent(llpPanel, logPanel, 0, gridy++, 4, 1, SPACE_INSETS,
                GridBagConstraints.LINE_START, GridBagConstraints.HORIZONTAL);
    }

    private void addComponent(Container container, Component component,
            int gridx, int gridy, int gridwidth, int gridheight, Insets insets,
            int anchor, int fill) {
        GridBagConstraints gbc = new GridBagConstraints(gridx, gridy,
                gridwidth, gridheight, 1.0D, 1.0D, anchor, fill, insets, 0, 0);
        container.add(component, gbc);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new RBMTestApplication());
    }

}

您应该始终通过调用SwingUtilities invokeLater方法来启动Swing应用程序。这可确保在Event Dispatch线程上创建和更新Swing组件。

Answer 3

看一看http://docs.oracle.com/javase/tutorial/uiswing/layout/using.html

您必须根据需要设置合适的LayoutManager，否则将使用可能不适合的默认LayoutManager。