JTabbedPane（3）

/*
* TabbedPaneDemo.java requires one additional file:
*   images/middle.gif.
*/

import javax.swing.JTabbedPane;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JComponent;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.KeyEvent;
import javax.swing.JButton;

public class TabbedPaneDemo extends JPanel {
    public TabbedPaneDemo() {
        super(new GridLayout(1, 1));
//        super();

        JTabbedPane tabbedPane = new JTabbedPane();
        ImageIcon icon = createImageIcon("images/middle.gif");

        JComponent panel1 = makeTextPanel("Panel #1","标签1");//增加一个选项卡
        tabbedPane.addTab("Tab 1", icon, panel1,
                "Does nothing");
        tabbedPane.setMnemonicAt(0, KeyEvent.VK_1);

        JComponent panel2 = makeTextPanel("Panel #2","标签2");
        tabbedPane.addTab("Tab 2", icon, panel2,
                "Does twice as much nothing");
        tabbedPane.setMnemonicAt(1, KeyEvent.VK_2);

        JComponent panel3 = makeTextPanel("Panel #3","标签3");
        tabbedPane.addTab("Tab 3", icon, panel3,
                "Still does nothing");
        tabbedPane.setMnemonicAt(2, KeyEvent.VK_3);

        JComponent panel4 = makeTextPanel(
                "Panel #4 (has a preferred size of 410 x 50).","标签4");
        panel4.setPreferredSize(new Dimension(410, 50));
        tabbedPane.addTab("Tab 4", icon, panel4,
                "Does nothing at all");
        tabbedPane.setMnemonicAt(3, KeyEvent.VK_4);
        JComponent panel5 = makeTextPanel("Panel #5","标签5");
        panel5.setPreferredSize(new Dimension(410,50));
        tabbedPane.addTab("标签5", icon,panel5,"测试用标签");

        //Add the tabbed pane to this panel.
        add(tabbedPane);

        //The following line enables to use scrolling tabs.
        tabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
    }

    protected JComponent makeTextPanel(String text,String buttons) {// 制定的组件
        JPanel panel = new JPanel(false);
        JLabel filler = new JLabel(text);
        JButton button = new JButton(buttons);
        filler.setHorizontalAlignment(JLabel.CENTER);
//        panel.setLayout(new GridLayout(1, 1));
        panel.add(filler);
        panel.add(button);
        return panel;
    }

    /** Returns an ImageIcon, or null if the path was invalid. */
    protected static ImageIcon createImageIcon(String path) {
        java.net.URL imgURL = TabbedPaneDemo.class.getResource(path);
        if (imgURL != null) {
            return new ImageIcon(imgURL);
        } else {
            System.err.println("Couldn't find file: " + path);
            return null;
        }
    }

    /**
     * Create the GUI and show it. For thread safety,
     * this method should be invoked from
     * the event dispatch thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("TabbedPaneDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Add content to the window.
        frame.add(new TabbedPaneDemo(), BorderLayout.CENTER);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event dispatch thread:
        //creating and showing this application's GUI.
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                //Turn off metal's use of bold fonts
        UIManager.put("swing.boldMetal", Boolean.FALSE);
        createAndShowGUI();
            }
        });
    }
}