Java BorderLayout class

BorderLayout places swing components in the North, South, East, West and center of a container. All extra space is placed in the center area. You can add horizontal and vertical gaps between the areas.

Every content pane is initialized to use a BorderLayout. Components are added to a BorderLayout by using the add method. JFrame’s content pane default layout manager: BorderLayout. In BorderLayout, a component’s position is specified by a second argument to add.

BorderLayout Source Code

/* * BorderLayoutDemo.java is a 1.4 application that requires no other files. */ import java.awt.BorderLayout; import java.awt.Container; import java.awt.Dimension; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; public class BorderLayoutDemo { public static boolean RIGHT_TO_LEFT = false; public static void addComponentsToPane(Container contentPane) { // Use BorderLayout. Default empty constructor with no horizontal and vertical // gaps contentPane.setLayout(new BorderLayout(5,5)); if (!(contentPane.getLayout() instanceof BorderLayout)) { contentPane.add(new JLabel("Container doesn't use BorderLayout!")); return; } if (RIGHT_TO_LEFT) { <font size=-1> contentPane.setComponentOrientation( java.awt.ComponentOrientation.RIGHT_TO_LEFT); } JButton jbnSampleButtons = new JButton("Button 1 (PAGE_START)"); contentPane.add(jbnSampleButtons, BorderLayout.PAGE_START); jbnSampleButtons = new JButton("Button 2 (CENTER)"); jbnSampleButtons.setPreferredSize(new Dimension(200, 100)); contentPane.add(jbnSampleButtons, BorderLayout.CENTER); jbnSampleButtons = new JButton("Button 3 (LINE_START)"); contentPane.add(jbnSampleButtons, BorderLayout.LINE_START); jbnSampleButtons = new JButton("Long-Named Button 4 (PAGE_END)"); contentPane.add(jbnSampleButtons, BorderLayout.PAGE_END); jbnSampleButtons = new JButton("5 (LINE_END)"); contentPane.add(jbnSampleButtons, BorderLayout.LINE_END); } private static void createAndShowGUI() { JFrame.setDefaultLookAndFeelDecorated(true); JFrame frame = new JFrame("BorderLayout Source Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Set up the content pane and add swing components to it addComponentsToPane(frame.getContentPane()); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } }

output

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