How to change the alpha of a JPanel?

programming
1

I’m pretty new to Java, so sorry if this is a dumb question. I’m trying to make a JPanel semi-transparent. I have the class playPanel.java…


import java.awt.*;
import javax.swing.*;

public class playPanel extends JPanel
{
    int blockType;
    public playPanel()
    {
        super();
        setLayout(null);
    }
}

…and from another class, gameFrame.java, I create a new playPanel…

pp = new playPanel();
pp.setBounds((int)(appWidth * .5 - playWidth * .5), (int)(appHeight * .5 - playHeight * .55 - 10), playWidth, playHeight);
getContentPane().add(pp);

Is there an easy way to change the alpha of pp?