JScrollPane in Java Swing

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JScrollPanes are used in GUI development to restrict a widget to a certain size on the screen, then provide a way of scrolling up and down, left and right if the widget becomes any bigger than the 'Viewport' size. This is used primarily in JTextArea, JTable and JList where the data displayed by the widget is changed dynamically and can really affect the size and dimensions of the widget.

/* =========================================================== File Name : JScrollPaneDemo.java WebSite : http://javaproglang.blogspot.in/ Facebook : https://www.facebook.com/AdvanceJavaProgramming Twitter ID : https://twitter.com/AdvanceJava Created By : Bintu Chaudhary =========================================================== */ import java.awt.*; import javax.swing.*; class JScrollPaneDemo extends JFrame { private JScrollPane scrollPane; public JScrollPaneDemo() { setTitle( "JScrollPaneDemo" ); setSize( 300, 200 ); setBackground( Color.gray ); JPanel topPanel = new JPanel(); topPanel.setLayout( new BorderLayout() ); getContentPane().add( topPanel ); Icon image = new ImageIcon("images/laura.jpg" ); JLabel label = new JLabel( image ); // Create a tabbed pane scrollPane = new JScrollPane(); scrollPane.getViewport().add( label ); topPanel.add( scrollPane, BorderLayout.CENTER ); } public static void main( String args[] ) { // Create an instance of the test application JScrollPaneDemo mainFrame = new JScrollPaneDemo(); mainFrame.setVisible( true ); } }

C:\>jdk1.4\bin>javac JScrollPaneDemo.java
C:\>jdk1.4\bin>java JScrollPaneDemo

"Output of JScrollPaneDemo.class"

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Java Swing-II

JOptionPane Class	Input Dialog Boxes	JSliders
JProgressBars	JTables	JTabbedPane
JMenu	JPopupMenu	JToolBar
JFileChooser	JScrollBar	JScrollPane
JRootPane	JTextPane	JTree
JSplitPane	JDesktopPane	JEditorPane