如何在 JTabbedPane 中制作双线

Question

我不确定我的标题有多大意义，但既然你应该有一个不错的标题，这是我想出的最好的标题，所以我实际上的意思是......

让我们说理论上我有10 个选项卡，我不想将它们全部压缩在 1 行中，而是将它们分成 2 个，因此我在上侧有 5 个选项卡，在下侧有 5 个选项卡。 示例图片：

Answer 1

不清楚你的问题，但 JTabbedPane 中有选项卡的基本方法

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;

public class TabComponentsDemo extends JFrame {

    private static final long serialVersionUID = 1L;
    private final int tabNumber = 15;
    private final JTabbedPane pane = new JTabbedPane();
    private JMenuItem tabComponentsItem;
    private JMenuItem scrollLayoutItem;

    public TabComponentsDemo(String title) {
        super(title);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        initMenu();
        add(pane);
    }

    public void runTest() {
        pane.removeAll();
        for (int i = 0; i < tabNumber; i++) {
            String title = "Tab " + i;
            pane.add(title, new JLabel(title));
            //initTabComponent(i);
        }
        tabComponentsItem.setSelected(true);
        pane.setTabLayoutPolicy(JTabbedPane.WRAP_TAB_LAYOUT);
        scrollLayoutItem.setSelected(false);
        setSize(new Dimension(400, 200));
        setLocationRelativeTo(null);
        setVisible(true);
    }

    /*private void initTabComponent(int i) {
    pane.setTabComponentAt(i, new ButtonTabComponent(pane));
    }*/
    private void initMenu() {//Setting menu
        JMenuBar menuBar = new JMenuBar();//create Options menu        
        tabComponentsItem = new JCheckBoxMenuItem("Use TabComponents", true);
        tabComponentsItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_T, InputEvent.ALT_MASK));
        tabComponentsItem.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                for (int i = 0; i < pane.getTabCount(); i++) {
                    if (tabComponentsItem.isSelected()) {
                        //initTabComponent(i);
                    } else {
                        pane.setTabComponentAt(i, null);
                    }
                }
            }
        });
        scrollLayoutItem = new JCheckBoxMenuItem("Set ScrollLayout");
        scrollLayoutItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.ALT_MASK));
        scrollLayoutItem.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                if (pane.getTabLayoutPolicy() == JTabbedPane.WRAP_TAB_LAYOUT) {
                    pane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
                } else {
                    pane.setTabLayoutPolicy(JTabbedPane.WRAP_TAB_LAYOUT);
                }
            }
        });
        JMenuItem resetItem = new JMenuItem("Reset JTabbedPane");
        resetItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_R, InputEvent.ALT_MASK));
        resetItem.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                runTest();
            }
        });
        JMenu optionsMenu = new JMenu("Options");
        optionsMenu.add(tabComponentsItem);
        optionsMenu.add(scrollLayoutItem);
        optionsMenu.add(resetItem);
        menuBar.add(optionsMenu);
        setJMenuBar(menuBar);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                UIManager.put("swing.boldMetal", Boolean.FALSE);
                new TabComponentsDemo("TabComponentsDemo").runTest();
            }
        });
    }
}

Answer 2

如果您希望它们全部显示在一行中（我认为这就是您描述的后半部分所指示的......），您需要将选项卡布局策略设置为 JTabbedPane.SCROLL_TAB_LAYOUT 。

这是一个带有图像的示例。