Java™ 7: A Beginner's Tutorial (Third Edition) by Budi Kurniawan

Author:Budi Kurniawan
Language: eng
Format: epub, azw3
ISBN: 9780980839616
Publisher: Budi Kurniawan

Figure 16.2: A JFrame that uses a BorderLayout (left) and the same JFrame resized (right)

Note that the JTextField and the JButton are placed in the west and east regions of the JFrame. If you resize the JFrame, the components will maintain their positions. The size of each component adjusts accordingly, and setting the size of the components (by using setSize) does not have effect. It is clear the BorderLayout has the final say with regard to the components’ sizes and positions.

Listing 16.2 shows another example of BorderLayout.

Listing 16.2: Another example of BorderLayout

package app16; import java.awt.BorderLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; import javax.swing.SwingUtilities; public class BorderLayoutTest2 extends JFrame { private static void constructGUI() { JFrame.setDefaultLookAndFeelDecorated(true); JFrame frame = new JFrame("BorderLayout Test"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); JLabel label1 = new JLabel("Registration Form"); label1.setHorizontalAlignment(JLabel.CENTER); frame.add(label1, BorderLayout.NORTH); JLabel label2 = new JLabel("Name:") frame.add(label2, BorderLayout.WEST); JTextField textField = new JTextField("<your name>"); frame.add(textField, BorderLayout.CENTER); JButton button1 = new JButton("Register"); frame.add(button1, BorderLayout.EAST); JButton button2 = new JButton("Clear Form"); frame.add(button2, BorderLayout.SOUTH); frame.setSize(300, 150); frame.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { constructGUI(); } }); } }

Figure 16.3 shows the result of running the code in Listing 16.2.

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