Η Java υποστηρίζει μία σειρά από κλάσεις που υλοποιούν το interface javax.swing.Βorder τις οποίες μπορείτε να χρησιμοποιήσετε για να ορίσετε ένα Border σε οποιοδήποτε javax.swing.JComponent χρησιμοποιείτε. Τα borders δημιουργούνται μέσω της κλάσης javax.swing.BorderFactory, η οποία δημιουργεί επιμέρους τύπους αντικειμένων τύπου Border ανάλογα με την μέθοδο της κλάσης που χρησιμοποιούμε.
Πιο συγκεκριμένα οι κλάση javax.swing.BorderFactory μπορεί να παράγει τους παρακάτω βασικούς τύπους από borders (αναφέρουμε τους πιο βασικούς):
Δείτε το παρακάτω παράδειγμα το οποίο εμφανίζει παραλλαγές από τους παραπάνω τύπους borders. Τα borders σε όλες τις περιπτώσεις του παραδείγματος περιβάλλουν ένα αντικείμενο τύπου javax.swing.JLabel που περιέχει κείμενο.
import java.awt.*; import java.awt.event.*; import javax.swing.BorderFactory; import javax.swing.border.Border; import javax.swing.border.TitledBorder; import javax.swing.border.EtchedBorder; import javax.swing.ImageIcon; import javax.swing.JTabbedPane; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JFrame; import javax.swing.Box; import javax.swing.BoxLayout; /* * BorderDemo.java requires the following file: * images/wavy.gif */ public class BorderDemo extends JPanel { public BorderDemo() { super(new GridLayout(1,0)); //Keep references to the next few borders, //for use in titles and compound borders. Border blackline, raisedetched, loweredetched, raisedbevel, loweredbevel, empty; //A border that puts 10 extra pixels at the sides and //bottom of each pane. Border paneEdge = BorderFactory.createEmptyBorder(0,10,10,10); blackline = BorderFactory.createLineBorder(Color.black); raisedetched = BorderFactory.createEtchedBorder(EtchedBorder.RAISED); loweredetched = BorderFactory.createEtchedBorder(EtchedBorder.LOWERED); raisedbevel = BorderFactory.createRaisedBevelBorder(); loweredbevel = BorderFactory.createLoweredBevelBorder(); empty = BorderFactory.createEmptyBorder(); //First pane: simple borders JPanel simpleBorders = new JPanel(); simpleBorders.setBorder(paneEdge); simpleBorders.setLayout(new BoxLayout(simpleBorders, BoxLayout.Y_AXIS)); addCompForBorder(blackline, "line border", simpleBorders); addCompForBorder(raisedetched, "raised etched border", simpleBorders); addCompForBorder(loweredetched, "lowered etched border", simpleBorders); addCompForBorder(raisedbevel, "raised bevel border", simpleBorders); addCompForBorder(loweredbevel, "lowered bevel border", simpleBorders); addCompForBorder(empty, "empty border", simpleBorders); //Second pane: dashed borders JPanel dashedBorders = new JPanel(); dashedBorders.setBorder(paneEdge); dashedBorders.setLayout(new BoxLayout(dashedBorders, BoxLayout.Y_AXIS)); Border border = BorderFactory.createDashedBorder(Color.CYAN, 5, 1, 1, true ); addCompForBorder(border, "dashed border (Color.CYAN, 5, 1, 1, true)", dashedBorders); border = BorderFactory.createDashedBorder(Color.BLUE, (float)2.0, (float)4); addCompForBorder(border, "dashed border (Color.BLUE, 2, 1.5)", dashedBorders); //Third pane: titled borders JPanel titledBorders = new JPanel(); titledBorders.setBorder(paneEdge); titledBorders.setLayout(new BoxLayout(titledBorders, BoxLayout.Y_AXIS)); TitledBorder titled; titled = BorderFactory.createTitledBorder("title"); addCompForBorder(titled, "default titled border" + " (default just., default pos.)", titledBorders); titled = BorderFactory.createTitledBorder( blackline, "title"); addCompForTitledBorder(titled, "titled line border" + " (centered, default pos.)", TitledBorder.CENTER, TitledBorder.DEFAULT_POSITION, titledBorders); titled = BorderFactory.createTitledBorder(loweredetched, "title"); addCompForTitledBorder(titled, "titled lowered etched border" + " (right just., default pos.)", TitledBorder.RIGHT, TitledBorder.DEFAULT_POSITION, titledBorders); titled = BorderFactory.createTitledBorder( loweredbevel, "title"); addCompForTitledBorder(titled, "titled lowered bevel border" + " (default just., above top)", TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.ABOVE_TOP, titledBorders); titled = BorderFactory.createTitledBorder( empty, "title"); addCompForTitledBorder(titled, "titled empty border" + " (default just., bottom)", TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.BOTTOM, titledBorders); //Fourth pane: compound borders JPanel compoundBorders = new JPanel(); compoundBorders.setBorder(paneEdge); compoundBorders.setLayout(new BoxLayout(compoundBorders, BoxLayout.Y_AXIS)); Border redline = BorderFactory.createLineBorder(Color.red); Border compound; compound = BorderFactory.createCompoundBorder( raisedbevel, loweredbevel); addCompForBorder(compound, "compound border (two bevels)", compoundBorders); compound = BorderFactory.createCompoundBorder( redline, compound); addCompForBorder(compound, "compound border (add a red outline)", compoundBorders); titled = BorderFactory.createTitledBorder( compound, "title", TitledBorder.CENTER, TitledBorder.BELOW_BOTTOM); addCompForBorder(titled, "titled compound border" + " (centered, below bottom)", compoundBorders); JTabbedPane tabbedPane = new JTabbedPane(); tabbedPane.addTab("Simple", null, simpleBorders, null); tabbedPane.addTab("Dashed", null, dashedBorders, null); tabbedPane.addTab("Titled", null, titledBorders, null); tabbedPane.addTab("Compound", null, compoundBorders, null); tabbedPane.setSelectedIndex(0); String toolTip = new String("<html>Blue Wavy Line border art crew:<br> Bill Pauley<br> Cris St. Aubyn<br> Ben Wronsky<br> Nathan Walrath<br> Tommy Adams, special consultant</html>"); tabbedPane.setToolTipTextAt(1, toolTip); add(tabbedPane); } void addCompForTitledBorder(TitledBorder border, String description, int justification, int position, Container container) { border.setTitleJustification(justification); border.setTitlePosition(position); addCompForBorder(border, description, container); } void addCompForBorder(Border border, String description, Container container) { JPanel comp = new JPanel(new GridLayout(1, 1), false); JLabel label = new JLabel(description, JLabel.CENTER); comp.add(label); comp.setBorder(border); container.add(Box.createRigidArea(new Dimension(0, 10))); container.add(comp); } /** Returns an ImageIcon, or null if the path was invalid. */ protected static ImageIcon createImageIcon(String path, String description) { java.net.URL imgURL = BorderDemo.class.getResource(path); if (imgURL != null) { return new ImageIcon(imgURL, description); } else { System.err.println("Couldn't find file: " + path); return null; } } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Create and set up the window. JFrame frame = new JFrame("BorderDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane. BorderDemo newContentPane = new BorderDemo(); newContentPane.setOpaque(true); //content panes must be opaque frame.setContentPane(newContentPane); //Display the window. frame.pack(); frame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } }
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