Java - placeholder on textfield

Question

I\'m trying to create a GUI with Swing. My problem is, I have a textfield, but I want it to have a \"placeholder\" (like in html). I read here and there that it can be done

Answer 1

I found this on the oracle forums.

public class TextFieldWithPrompt extends JTextField{

@Override
protected void paintComponent(java.awt.Graphics g) {
    super.paintComponent(g);

    if(getText().isEmpty() && ! (FocusManager.getCurrentKeyboardFocusManager().getFocusOwner() == this)){
        Graphics2D g2 = (Graphics2D)g.create();
        g2.setBackground(Color.gray);
        g2.setFont(getFont().deriveFont(Font.ITALIC));
        g2.drawString("zip", 5, 10); //figure out x, y from font's FontMetrics and size of component.
        g2.dispose();
    }
  }

https://forums.oracle.com/forums/thread.jspa?threadID=1349874