list of component not displayed

[mark smith]

hi

in a class who extends a JPanell, i have a list of JLabe
this class is added to a JFramel
the jframe is displayed but not the jlabel

private List<JLabel> lblJournee;
private String[] journee;

in the constructor of the class i have

journee = new String[]{
            "Lundi",
            "Mardi",
            "Mercredi",
            "Jeudi",
            "Vendredi",
            "Samedi",
            "Dimanche"
        };

for (int i = 0; i < lblJournee.size(); i++) {
            JLabel jlabel = new JLabel(journee[i]);
            lblJournee.add(jlabel);
            add(jlabel);
}

any idea?

thanks

[Darryl Burke]

Insufficient information. Without knowing to what Container class you are adding the JLabels, and what Layout Manager that container has, I wouldn't want to guess at the reason.

[mark smith]

Darryl Burke wrote:Insufficient information. Without knowing to chat Container class you are adding the JLabels, and what Layout Manager that container has, I wouldn't want toguess at the reason.

like i wrote, the container class is a JPanel

JFrame frame = new JFrame("Test");

        JPanel panel = new JPanel(new BorderLayout());
        panel.add(new JScrollPane(new JPanelPlanification()));
        panel.setPreferredSize(new Dimension(500, 600));

        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.getContentPane().add(panel);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);

[Rob Camick]

We are not mind readers. You still have not provided enough information.

Post your SSCCE that demonstrates the problem.

[mark smith]

all the code

import java.awt.Dimension;
import java.awt.FlowLayout;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListModel;

public class JPanelPlanification extends JPanel {

    private List<JLabel> lblJournee;
    private String[] journee;

    public JPanelPlanification() {
        
        setVisible(true);
        setSize(new Dimension(500, 600));

        lblJournee = new ArrayList<JLabel>();

        journee = new String[]{
            "Lundi",
            "Mardi",
            "Mercredi",
            "Jeudi",
            "Vendredi",
            "Samedi",
            "Dimanche"
        };

         for (int i = 0; i < lblJournee.size(); i++) {
            JLabel jlabel = new JLabel(journee[i]);
            
            lblJournee.add(jlabel);
            
            add(jlabel);
         } 
   }
}

other class

import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.WindowConstants;
public class Test extends JFrame{

    public Test(){
        JFrame frame = new JFrame("Test");

        JPanel panel = new JPanel(new BorderLayout());
        panel.add(new JScrollPane(new JPanelPlanification()));
        panel.setPreferredSize(new Dimension(500, 600));

        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.getContentPane().add(panel);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
        
    }
    
    public static void main(String[] args) {
        Test test = new Test();
    }
}

[Rob Camick]

Did you add any debug code to make sure the loop is being executed?

[mark smith]

initialization problem.....

lblJournee size is 0.... so the loop is not executed......

[Rob Spoor]

Which makes sense since you loop to the size of your List, not the size of your array. And at that time, the List is of course still empty.