JRadioButton b2 = new JRadioButton("B");
JRadioButton b3 = new JRadioButton("C");
// Define a button group.
ButtonGroup bg = new ButtonGroup();
// Create a label and add it to the content pane.
jlab = new JLabel("Select One");
// Handle button selection.
public void actionPerformed(ActionEvent ae) {
jlab.setText("You selected " + ae.getActionCommand());
Output from the radio button example is shown here:
JTabbedPane encapsulates a tabbed pane. It manages a set of components by linking them
with tabs. Selecting a tab causes the component associated with that tab to come to the
forefront. Tabbed panes are very common in the modern GUI, and you have no doubt used
them many times. Given the complex nature of a tabbed pane, they are surprisingly easy to
create and use.
JTabbedPane defines three constructors. We will use its default constructor, which
creates an empty control with the tabs positioned across the top of the pane. The other two
constructors let you specify the location of the tabs, which can be along any of the four
sides. JTabbedPane uses the SingleSelectionModel model.
Tabs are added by calling addTab( ). Here is one of its forms:
void addTab(String name, Component comp)
Here, name is the name for the tab, and comp is the component that should be added to
the tab. Often, the component added to a tab is a JPanel that contains a group of related
components. This technique allows a tab to hold a set of components.
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