26. A8 GridLayout and Radio Buttons

• GridLayout class arranges swing components in tabular format:

  
      // Use grid with 2 rows and one column:
      this.setLayout(new GridLayout(2, 1));
      this.getContentPane().add(mRadioPanel);
      this.getContentPane().add(mMainPanel);
      this.pack(); // Auto-arrange frame layout
  
  

• The following example demonstrates FrameRadioButtons class with two panels. GroupRadioButtons panel contains the radio buttons; another panel contains the push buttons, Change Color and Quit:

  • SwingMain.java (download) class SwingMain

  • FrameApplication.java (download) class FrameApplication extends javax.swing.JFrame

  • FrameApplicationClosing.java (download) class FrameApplicationClosing extends java.awt.event.WindowAdapter

  • FrameRadioButtons.java (download) class FrameRadioButtons extends FrameApplication implements ActionListener

  • GroupRadioButtonsListener.java (download) class GroupRadioButtonsListener implements ActionListener

  • GroupRadioButtons.java (download) class GroupRadioButtons extends JPanel, GroupRadioButtonsListener, JRadioButton, ButtonGroup, GridLayout, BorderFactory, Border