java.awt.AWTError: BoxLayout can't be shared [duplicate]

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BoxLayout can't be shared error (4 answers)

Closed 2 years ago.

I have initialized MotePanel, Command Panel and LEDPanel before setting their Layout, then how so am I getting this exception.

Please help.

Exception in thread "main" java.awt.AWTError: BoxLayout can't be shared
    at javax.swing.BoxLayout.checkContainer(BoxLayout.java:462)
    at javax.swing.BoxLayout.invalidateLayout(BoxLayout.java:246)
    at javax.swing.BoxLayout.addLayoutComponent(BoxLayout.java:279)
    at java.awt.Container.addImpl(Container.java:1107)
    at java.awt.Container.add(Container.java:974)
    at javax.swing.JFrame.addImpl(JFrame.java:556)
    at java.awt.Container.add(Container.java:377)
    at Window.(Window.java:54)

public class Window extends JFrame{
    private JPanel MotePanel;
    private JPanel LEDPanel;
    private JPanel CommandPanel;
    private JCheckBox motes[];
    private JRadioButton Leds[];

    public Window(){
        this.setLayout(new BoxLayout(this,BoxLayout.X_AXIS));
        this.setTitle("Sensor Networks Lab");
        this.setSize(300, 200);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);

        MotePanel = new JPanel();
        LEDPanel = new JPanel();
        CommandPanel = new JPanel();
        motes = new JCheckBox[10];
        Leds = new JRadioButton[3];


        MotePanel.setLayout(new BoxLayout(MotePanel, BoxLayout.Y_AXIS));
        CommandPanel.setLayout(new BoxLayout(CommandPanel, BoxLayout.Y_AXIS));
        LEDPanel.setLayout(new BoxLayout(LEDPanel, BoxLayout.Y_AXIS));

        System.out.println("creating MotePanel");
        for(int i=0; i<10; i++){
            motes[i] = new JCheckBox("Mote "+i);
            MotePanel.add(motes[i]);
        }


        System.out.println("creating LEDPanel");
        for(int i=0; i<3; i++)
            Leds[i] = new JRadioButton();
        Leds[0].setText("RED");
        LEDPanel.add(Leds[0]);
        Leds[1].setText("GREEN");
        LEDPanel.add(Leds[1]);
        Leds[2].setText("BLUE");
        LEDPanel.add(Leds[2]);

        this.add(MotePanel);
        this.add(LEDPanel);
        this.add(CommandPanel);
    }

задан Hovercraft Full Of Eels 6 May 2011 в 21:42

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