how to change JLabel color

Question

i have problem to change JLabel color. i am using three JLabel variables . i am putting mouse event on this JLabel variables. i run the and both are changes color when i am entring mouse on JLabels. i whis is that, at the time one JLabel change the color when I am entering the mouse on JLabel variable.

please solve this problem.

    entry.addMouseListener(this);
    entry.setOpaque(true);
    profile.addMouseListener(this);
    profile.setOpaque(true);

    public void mouseClicked(MouseEvent mc)
    {


    }
    public void mouseEntered(MouseEvent me) 
    {
        entry.setBackground(color);
        profile.setBackground(color);
    }
    public void mouseExited(MouseEvent me) 
    {

    entry.setBackground(Color.white);
    profile.setBackground(Color.white);

   }
   public void mousePressed(MouseEvent mp) 
   {

   }
   public void mouseReleased(MouseEvent mr)
   {

   }

What is your question? I dont understand.Btw isnt setForeground(color ) what you want? that change labels font color. — Tomas Bisciak, Feb 19 '14 at 08:19
Are you asking why _both_ labels change color when you move the mouse over just _one_ of them? In this case, try `me.getSource().setBackground(...)`. — tobias_k, Feb 19 '14 at 08:40
@tobias_k: preferably `getComponent()` instead of `getSource()` as otherwise you need a type-cast. But I think you nailed it. — Holger, Feb 19 '14 at 09:03

score 1 · Answer 1 · edited Feb 19 '14 at 08:46

Your issue is the method setBackground(), change on setForeground():

entry.addMouseListener(this);
entry.setOpaque(true);
profile.addMouseListener(this);
profile.setOpaque(true);

public void mouseClicked(MouseEvent mc)
{}

public void mouseEntered(MouseEvent me) 
{
    entry.setForeground(Color.red);
    profile.setForeground(Color.red);
}

public void mouseExited(MouseEvent me) 
{
    entry.setForeground(Color.white);
    profile.setForeground(Color.white);
}
public void mousePressed(MouseEvent mp) 
{}
public void mouseReleased(MouseEvent mr)
{}

score 1 · Accepted Answer · answered Feb 19 '14 at 11:17

Not entirely sure what you are asking... I assume that your problem is that you have two labels and when you enter the mouse into one of them you want just that label to have a red background, not both.

To do so, you can get the label that triggered the mouse event using e.getComponent() and then set the background for that label only. Also, you might want to use setBackground(null) to reset the background color, since the background of the underlying frame might not always be white. Finally, you can use the MouseAdapter class instead of the MouseListener, providing defaults (no-op) for all those other method you do not need.

MouseListener ma = new MouseAdapter() {
    public void mouseEntered(MouseEvent e) {
        e.getComponent().setBackground(Color.RED);
    }
    public void mouseExited(MouseEvent e) {
        e.getComponent().setBackground(null);
    }
};

how to change JLabel color

2 Answers2