I have looked for similar questions for hours, but I got no idea about the problem. Hoping somebody could help me.
Here is the class SimulatedWindow apart from the imports:
public class SimulatedWindow extends JFrame {
private JFrame defFrame = new JFrame();
SimulatedWindow() {
windowsInit();
}
private void windowsInit() {
defFrame.setSize(new Dimension(600, 480));
defFrame.setTitle("Radar Simulate System");
defFrame.setLayout(null);
defFrame.setLocation(100, 100);
DefPanel defPanel = new DefPanel();
// this.getContentPane().add(defPanel, BorderLayout.CENTER);
this.add(new DefPanel());
defFrame.add(defPanel);
defFrame.setDefaultCloseOperation(EXIT_ON_CLOSE);
defFrame.setVisible(true);
}
class DefPanel extends JPanel {
private LeftPanel myLeftPanel;
private RightPanel myRightPanel;
public DefPanel() {
setLayout(null);
myLeftPanel = new LeftPanel();
myRightPanel = new RightPanel();
add(new JButton("Hello World!"));
add(myLeftPanel);
add(myRightPanel);
System.out.println("DefPAnel");
}
}
class LeftPanel extends JPanel {
private JButton avgSpeedButton = new JButton();
private JButton trafficColumeButton = new JButton();
private JLabel avgSpeedLabel = new JLabel();
private JLabel trifficColumeLabel = new JLabel();
private JLabel curTimeLabel = new JLabel();
LeftPanel() {
setLayout(null);
this.setBounds(0, 0, this.getSize().width, this.getSize().height);
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
curTimeLabel.setText(df.format(new Date()));
add(curTimeLabel);
add(avgSpeedButton);
System.out.println("LeftPanel");
}
}
}
The main function follows:
public class SimulatedWindowTest {
public static void main(String[] args) {
SimulatedWindow simulatedWindow = new SimulatedWindow();
}
}
None of the elements (JButton, JLabel) in the JPanel are displaying.
