Java by API/javax.swing.border/Border

implements Border

 
import java.awt.Color;
import java.awt.ruponent;
import java.awt.Graphics;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.border.Border;
class SimpleBorder implements Border {
  int top,left,bottom,right;
  Color color = null;
  public SimpleBorder() {
    this.top = 2;
    this.left = 4;
    this.bottom = 8;
    this.right = 10;
    this.color = Color.RED;
  }
  public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
    Insets insets = getBorderInsets(c);
    if (color != null)
      g.setColor(color);
    g.fill3DRect(0, 0, width - insets.right, insets.top, true);
    g.fill3DRect(0, insets.top, insets.left, height - insets.top, true);
    g.fill3DRect(insets.left, height - insets.bottom, width - insets.left, insets.bottom, true);
    g.fill3DRect(width - insets.right, 0, insets.right, height - insets.bottom, true);
  }
  public Insets getBorderInsets(Component c) {
    return new Insets(top, left, bottom, right);
  }
  public boolean isBorderOpaque() {
    return true;
  }
}
public class Main {
  public static void main(String[] a) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton button = new JButton("Aaaaaaaaaaa");
    button.setBorder(new SimpleBorder());
    frame.add(button);
    frame.pack();
    frame.setVisible(true);
  }
}