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How to create the border

import java.awt.Color; import java.awt.GridLayout; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.border.Border; public class BorderTest extends JFrame {   public BorderTest() {     JPanel p = new JPanel();     Border[] border = new Border[] { BorderFactory.createEtchedBorder(),         BorderFactory.createTitledBorder("Border types"),         BorderFactory.createLoweredBevelBorder(),         BorderFactory.createRaisedBevelBorder(),         BorderFactory.createEtchedBorder(),         BorderFactory.createLineBorder(Color.blue),         BorderFactory.createMatteBorder(10, 10, 10, 10, Color.blue),         BorderFactory.createEmptyBorder()     };     p.setLayout(new GridLayout(border.length, 0, 3, 3));     for (int i = 0; i < border.length; i++) {       JPanel borderPanel = new JPanel();       borderPanel.setBorder(border[i]);       p.add(borderPanel);     }     getContentPane().add(p, "Center");     setTitle("BorderTest");     setSize(600, 400);     addWindowListener(new WindowAdapter() {       public void windowClosing(WindowEvent e) {         System.exit(0);       }     });   }   public static void main(String[] args) {     JFrame frame = new BorderTest();     frame.show();   } }