Create a Solid 3D border in Java

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Insets;
/*from  w  w w .ja  va 2  s.co m*/
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;

public class Main {

  public static void main(String[] args) {
    JFrame frame = new JFrame("Custom Border: SolidBorder");
    JLabel label = new JLabel("SolidBorder");
    ((JPanel) frame.getContentPane()).setBorder(new CompoundBorder(
        new EmptyBorder(10, 10, 10, 10), new SolidBorder()));
    frame.getContentPane().add(label);
    frame.setBounds(0, 0, 300, 150);
    frame.setVisible(true);
  }
}

class SolidBorder implements Border {
  protected Color topColor = Color.white;

  protected Color bottomColor = Color.gray;

  public SolidBorder() {
  }

  public Insets getBorderInsets(Component c) {
    return new Insets(2, 2, 2, 2);
  }

  public boolean isBorderOpaque() {
    return true;
  }

  public void paintBorder(Component c, Graphics g, int x, int y, int width,
      int height) {
    width--;
    height--;
    g.setColor(topColor);
    g.drawLine(x, y + height, x, y);
    g.drawLine(x, y, x + width, y);

    g.setColor(bottomColor);
    g.drawLine(x + width, y, x + width, y + height);
    g.drawLine(x, y + height, x + width, y + height);
  }

}