Create a Rectangle border in Java

/*from  w  w  w.  ja v a2 s.  co m*/
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Insets;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.border.AbstractBorder;
public class Main {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Sample Borders");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JLabel aLabel = new JLabel("java2s.com");
    aLabel.setBorder(new RectangleBorder(Color.RED));
    aLabel.setHorizontalAlignment(JLabel.CENTER);

    frame.add(aLabel);
    frame.setSize(400, 200);
    frame.setVisible(true);
  }
}

class RectangleBorder extends AbstractBorder {
 protected Insets thickness;

 protected Color lineColor;

 protected Insets gap;

 public RectangleBorder(Color color) {
   this(color, new Insets(1, 1, 1, 1));
 }

 public RectangleBorder(Color color, Insets thickness) {
   this(color, thickness, thickness);
 }

 public RectangleBorder(Color color, Insets thickness, Insets gap) {
   lineColor = color;
   this.thickness = thickness;
   this.gap = gap;
 }

 public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
   Color oldColor = g.getColor();


   g.setColor(lineColor);
   // top
   for (int i = 0; i < thickness.top; i++) {
     g.drawLine(x, y + i, x + width, y + i);
   }
   // bottom
   for (int i = 0; i < thickness.bottom; i++) {
     g.drawLine(x, y + height - i - 1, x + width, y + height - i - 1);
   }
   // right
   for (int i = 0; i < thickness.right; i++) {
     g.drawLine(x + width - i - 1, y, x + width - i - 1, y + height);
   }
   // left
   for (int i = 0; i < thickness.left; i++) {
     g.drawLine(x + i, y, x + i, y + height);
   }
   g.setColor(oldColor);
 }

 /**
  * Returns the insets of the border.
  * 
  * @param c
  *          the component for which this border insets value applies
  */
 public Insets getBorderInsets(Component c) {
   return gap;
 }

 public Insets getBorderInsets(Component c, Insets insets) {
   insets.left = gap.left;
   insets.top = gap.top;
   insets.right = gap.right;
   insets.bottom = gap.bottom;
   return insets;
 }

 /**
  * Returns the color of the border.
  */
 public Color getLineColor() {
   return lineColor;
 }

 /**
  * Returns the thickness of the border.
  */
 public Insets getThickness() {
   return thickness;
 }

 /**
  * Returns whether or not the border is opaque.
  */
 public boolean isBorderOpaque() {
   return false;
 }

 public Insets getGap() {
   return gap;
 }

}