Java by API/javax.swing.border/CompoundBorder

new CompoundBorder(Border outsideBorder, Border insideBorder)

   <source lang="java">

import java.awt.Color; import java.awt.Container; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.border.Border; import javax.swing.border.rupoundBorder;

public class MainClass {

 public static void main(final String args[]) {
   JFrame frame = new JFrame("Justified Titled Borders");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   
   Border greenBorder = BorderFactory.createLineBorder(Color.GREEN, 2);
   Border blueBorder = BorderFactory.createLineBorder(Color.BLUE, 2);
   Border magentaBorder = BorderFactory.createLineBorder(Color.MAGENTA, 2);
   Border twoColorBorder = new CompoundBorder(magentaBorder, blueBorder);
   Border threeColorBorder = new CompoundBorder(twoColorBorder, greenBorder);
   JButton rainbowButton = new JButton("Rainbow");
   rainbowButton.setBorder(threeColorBorder);
   Container contentPane = frame.getContentPane();
   contentPane.add(rainbowButton);
   frame.setSize(300, 200);
   frame.setVisible(true);
 }

}

      </source>