尝试将2（JLabel，JSlider）添加到具有BorderLayout的面板中，仅绘制JSlider

Question

I have copy my code to display a text feild and a JSlider) from a project that usses a JFrame

My new project usses a JInternalFrame, and only the slider is drawn. If I comment out the code it will draw the text field, seems like it only wonts to draw 1 control.

code

    JPanel containerPanel = new JPanel(new BorderLayout() );
    cDrawComponent mDrawComponent = new cDrawComponent();  
    containerPanel.add(mDrawComponent,BorderLayout.CENTER);
    JLabel mJLabel=new JLabel("000");
    mJSlider = new JSlider(JSlider.HORIZONTAL, 0, 1000,500);
    JPanel sliderPanel = new JPanel(new BorderLayout() );

// TRYING TO ADD 2 CONPOMENTS ONLY SLIDER IS SHOWN sliderPanel.add(mJLabel); sliderPanel.add(mJSlider); containerPanel.add(sliderPanel,BorderLayout.SOUTH);

    class SliderListener implements ChangeListener {
        public void stateChanged(ChangeEvent e) {
            JSlider source = (JSlider) e.getSource();
            ted++;
            if (!source.getValueIsAdjusting()) {
                {
                    sliderPes = (int) source.getValue();
                    int max=source.getMaximum();                
                    scrollPes=max-sliderPes;
                    repaint();
                }
            }
        }
    }
    mJSlider.addChangeListener(new SliderListener());
    add(containerPanel);

Answer 1

Use

sliderPanel.add(mJLabel, BorderLayout.WEST);

The BorderLayout can show only one component at the center (Default, if ommited). That's usually the last one, that got added.