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Java JList issue

I've added the following code to a JList and am now unable to select individual items in the list

Any Ideas? For reference getANZIC returns a string value
@SuppressWarnings("serial")
class MyCellRenderer extends JLabel implements ListCellRenderer {

public Component getListCellRendererComponent(
      JList list,
      Object value,            // value to display
      int index,               // cell index
      boolean isSelected,      // is the cell selected
      boolean cellHasFocus)    // the list and the cell have the focus
    {
	
    
        setText(((Occupation)value).getANZIC());
        return this;
    }
}

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CloudStrife209
Asked:
CloudStrife209
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1 Solution
 
for_yanCommented:


>I've added the following code to a JList

Please, post your code the part were you craete the list and set the renderer
0
 
CloudStrife209Author Commented:
here you go
JList listing = new JList(occupationList);
listing.setCellRenderer(new MyCellRenderer());

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for_yanCommented:
What means unable to select?
How do you judge that it is not selecting?

Can you post more of your code so that I copuld try
to run it myself?
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for_yanCommented:
It would work if you extend DefaultListCellRenderer.
Try this code:

import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
import java.util.Vector;

public class JListTest extends JFrame {

    public JListTest() {
        super("test");

        Vector<Occupation> ar = new Vector<Occupation>();
      ar.add(new Occupation("MD"));
       ar.add(new Occupation("PD"));
       ar.add(new Occupation("LD"));

        JList l = new JList(ar);
        l.setCellRenderer(new MyCellRenderer());

        Container c = this.getContentPane();
        c.add(l);

        this.setSize(300,300);
        this.setVisible(true);





    }

    public static void main(String[] args) {
        new JListTest();
    }

}
class Occupation {
    String text;

    Occupation(String s){
        text = s;
    }

    public String toString(){
        return text;
    }

}

@SuppressWarnings("serial")
class MyCellRenderer extends  DefaultListCellRenderer{

public Component getListCellRendererComponent(
      JList list,
      Object value,            // value to display
      int index,               // cell index
      boolean isSelected,      // is the cell selected
      boolean cellHasFocus)    // the list and the cell have the focus
    {

          System.out.println("value: " + value);
          System.out.println(isSelected);
           System.out.println(cellHasFocus);

        if(isSelected)this.setBackground(Color.blue);
        else    this.setBackground(Color.white);
       this.setText(((Occupation)value).toString());
        return this;
    }
}

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for_yanCommented:
This is another variant how it works:

import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
import java.util.Vector;

public class JListTest extends JFrame {

    public JListTest() {
        super("test");

        Vector<Occupation> ar = new Vector<Occupation>();
      ar.add(new Occupation("MD"));
       ar.add(new Occupation("PD"));
       ar.add(new Occupation("LD"));

        JList l = new JList(ar);
        l.setCellRenderer(new MyCellRenderer1());

        Container c = this.getContentPane();
        c.add(l);

        this.setSize(300,300);
        this.setVisible(true);





    }

    public static void main(String[] args) {
        new JListTest();
    }

}
class Occupation {
    String text;

    Occupation(String s){
        text = s;
    }

    public String toString(){
        return text;
    }

}



class MyCellRenderer1 extends JLabel implements ListCellRenderer {

  public MyCellRenderer1() {
    setOpaque(true);
  }

  public Component getListCellRendererComponent(JList list, Object value, int index,
      boolean isSelected, boolean cellHasFocus) {
    setText(value.toString());

    if (isSelected) {
      setBackground(list.getSelectionBackground());
      setForeground(list.getSelectionForeground());
    } else {
      setBackground(list.getBackground());
      setForeground(list.getForeground());
    }
    return this;
  }
}

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for_yanCommented:
This is based on your code and it is working.

You of course need to add if(isSelected)... else
and another thing which turns out to be impiortnat
is setOpaque(true) in the constructor.

import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
import java.util.Vector;

public class JListTest extends JFrame {

    public JListTest() {
        super("test");

        Vector<Occupation> ar = new Vector<Occupation>();
      ar.add(new Occupation("MD"));
       ar.add(new Occupation("PD"));
       ar.add(new Occupation("LD"));

        JList l = new JList(ar);
        l.setCellRenderer(new MyCellRenderer());

        Container c = this.getContentPane();
        c.add(l);

        this.setSize(300,300);
        this.setVisible(true);





    }

    public static void main(String[] args) {
        new JListTest();
    }

}
class Occupation {
    String text;

    Occupation(String s){
        text = s;
    }

    public String toString(){
        return text;
    }

}




class MyCellRenderer extends JLabel implements ListCellRenderer {
     public MyCellRenderer() {
    setOpaque(true);
  }

public Component getListCellRendererComponent(
      JList list,
      Object value,            // value to display
      int index,               // cell index
      boolean isSelected,      // is the cell selected
      boolean cellHasFocus)    // the list and the cell have the focus
    {
         
         if (isSelected) {
      setBackground(Color.blue);
      setForeground(Color.black);
    } else {
      setBackground(Color.white);
      setForeground(Color.black);
    }

        setText(((Occupation)value).toString());
        return this;
    }
}

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CloudStrife209Author Commented:
Thanks
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