在容器中的多个 JInternalFrame 中进行选择（JPanel）

我有一些JInternalFrame in a Jpanel。和JPanel是网格布局。我只需要设置一个JInternalFrame要在容器中选择（JPanel）。我创建了JInternalFrame动态实例并添加到面板。我仍然保留着名单JInternalFrame但如何只选择一个设置。

正如建议的如何使用内部框架 http://docs.oracle.com/javase/tutorial/uiswing/components/internalframe.html，“通常，您将内部框架添加到桌面窗格。”这允许您使用activateFrame() http://docs.oracle.com/javase/7/docs/api/javax/swing/DesktopManager.html#activateFrame%28javax.swing.JInternalFrame%29指示框架具有焦点。在这个example http://groups.google.com/group/comp.lang.java.programmer/msg/2e1b14bcad9bd7fa, a javax.swing.Action http://docs.oracle.com/javase/7/docs/api/javax/swing/Action.html用于从菜单中选择帧setSelected() http://docs.oracle.com/javase/7/docs/api/javax/swing/JInternalFrame.html#setSelected%28boolean%29。其他讨论可以在此找到.

附录：如果您想使用JPanel，也许是为了得到一个好的GridLayout，一种方法是使用InternalFrameListener http://docs.oracle.com/javase/tutorial/uiswing/events/internalframelistener.html如下所示。

import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.beans.PropertyVetoException;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.event.InternalFrameAdapter;
import javax.swing.event.InternalFrameEvent;

/** @see https://stackoverflow.com/questions/8389640 */
public class InternalGrid extends JPanel {

    private final List<MyFrame> list = new ArrayList<MyFrame>();

    public InternalGrid() {
        super(new GridLayout(2, 2));
        for (int i = 0; i < 4; i++) {
            MyFrame f = new MyFrame("Frame", i);
            list.add(f);
            this.add(f);
        }
    }

    private void display() {
        JFrame f = new JFrame("InternalGrid");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(this);
        f.pack();
        f.setSize(320, 240);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }

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

            @Override
            public void run() {
                new InternalGrid().display();
            }
        });
    }

    class MyFrame extends JInternalFrame {

        MyFrame(String name, int i) {
            super(name + String.valueOf(i), true, true, true, false);
            this.pack();
            this.setVisible(true);
            this.setLayout(new FlowLayout());
            this.add(new JLabel("Hi, I'm " + this.getTitle()));
            this.addInternalFrameListener(new InternalFrameAdapter() {

                @Override
                public void internalFrameActivated(InternalFrameEvent e) {
                    for (MyFrame f : list) {
                        if (f != MyFrame.this) {
                            try {
                                f.setSelected(false);
                            } catch (PropertyVetoException ex) {
                                System.out.println(ex);
                            }
                        }
                    }
                }
            });
        }
    }
}