0

当我单击确定按钮时，它应该打印所有选中的项目。这是我尝试过的。

我尝试了以下代码，但它不起作用。

public class FilePermission extends JPanel implements ItemListener {

static String[] videoAvailable = new String[25];
static int j = 0;
JCheckBox[] file_boxes = new JCheckBox[25];
JButton button;
StringBuffer choices;
JLabel pictureLabel;
//static int j = 0;

public FilePermission() {
    super(new BorderLayout());
    JPanel checkPanel = new JPanel(new GridLayout(0, 1));
    //Create the check boxes.
    for (int i = 0; i < videoAvailable.length; i++) {
        if (videoAvailable[i] != null) {
            file_boxes[i] = new JCheckBox(videoAvailable[i]);
            file_boxes[i].addItemListener(this);
            checkPanel.add(file_boxes[i]);
        }
    }
    button = new JButton("ok");
    //Register a listener for the check boxes.
    button.addItemListener(this);
    //Indicates what's on the geek.
    //Set up the picture label
    pictureLabel = new JLabel();
    pictureLabel.setFont(pictureLabel.getFont().deriveFont(Font.ITALIC));
    //Put the check boxes in a column in a panel

    checkPanel.add(button);

    add(checkPanel, BorderLayout.LINE_START);
    add(pictureLabel, BorderLayout.CENTER);
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}

/** Listens to the check boxes. */
public void itemStateChanged(ItemEvent e) {
    for (int i = 0; i < videoAvailable.length; i++) {
        if (videoAvailable[i] != null) {
            if (file_boxes[i].isSelected()) {
                System.out.println(file_boxes[i]);
            }
        }
    }
    if (button.isSelected()) {
        System.out.println(button);
    }
}

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

    //Create and set up the content pane.
    JComponent newContentPane = new FilePermission();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);

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

public static void main(String[] args) throws IOException {

    File directory = new File("D:\\ims\\");
    parseDir(directory);

    //Schedule a job for the event-dispatching thread:
    //creating and showing this application's GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable() {

        public void run() {
            createAndShowGUI();
        }
    });
  }

这些方法是从 java 类的 main 方法调用的。如果你不明白，我想回答。

4

2 回答 2

0

请评论“button.addItemListener(this);”。或者使用 ActionListener 作为 OK 按钮。

于 2013-03-28T13:02:33.090 回答
0

我能够找出答案。如下：

public class FilePermission extends JPanel implements ItemListener {

static String[] videoAvailable = new String[25];
static int j = 0;
JCheckBox[] file_boxes = new JCheckBox[25];
JButton button;
StringBuffer choices;
JLabel pictureLabel;
static JFrame frame = new JFrame("CheckBoxDemo");

//static int j = 0;

public FilePermission() {
    super(new BorderLayout());
    JPanel checkPanel = new JPanel(new GridLayout(0, 1));
    //Create the check boxes.
    for (int i = 0; i < videoAvailable.length; i++) {
        if (videoAvailable[i] != null) {
            file_boxes[i] = new JCheckBox(videoAvailable[i]);
            file_boxes[i].addItemListener(this);
            checkPanel.add(file_boxes[i]);
        }
    }
    button = new JButton("ok");
    //Register a listener for the check boxes.
    button.addItemListener(this);
    //Indicates what's on the geek.
    //Set up the picture label
    pictureLabel = new JLabel();
    pictureLabel.setFont(pictureLabel.getFont().deriveFont(Font.ITALIC));
    //Put the check boxes in a column in a panel

    checkPanel.add(button);

    add(checkPanel, BorderLayout.LINE_START);
    add(pictureLabel, BorderLayout.CENTER);
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

    button.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
    for (int i = 0; i < videoAvailable.length; i++) {
        if (videoAvailable[i] != null) {
            if (file_boxes[i].isSelected()) {
                System.out.println(videoAvailable[i]);
            }
        }
    }
                     frame.dispose();

            }
    });
}

/** Listens to the check boxes. */
public void itemStateChanged(ItemEvent e) {
    for (int i = 0; i < videoAvailable.length; i++) {
        if (videoAvailable[i] != null) {
            if (file_boxes[i].isSelected()) {
                System.out.println(file_boxes[i]);
            }
        }
    }
    if (button.isSelected()) {
        System.out.println(button);
    }
}


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

    //Create and set up the content pane.
    JComponent newContentPane = new FilePermission();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);

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

public static void main(String[] args) throws IOException {

    File directory = new File("D:\\ims\\");
    parseDir(directory);

    //Schedule a job for the event-dispatching thread:
    //creating and showing this application's GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable() {

        public void run() {
            createAndShowGUI();
        }
    });
   }

public static void parseDir(File dirPath) {
    try {
        File files[] = null;
        if (dirPath.isDirectory()) {
            files = dirPath.listFiles();

            for (File dirFiles : files) {

                if (dirFiles.isDirectory()) {
                    parseDir(dirFiles);
                } else {
                    if (dirFiles.getName().endsWith(".mkv")) {

                        videoAvailable[j] = dirFiles.getName();
                        j++;

                    }
                }
            }

        } else {
            if (dirPath.getName().endsWith(".mkv")) {
                videoAvailable[j] = dirPath.getName();
                j++;
            }
        }


    } catch (Exception e) {
        e.printStackTrace();
    }

}
 }
于 2013-03-28T23:17:22.730 回答