Adding other interface objects:
The last set of additions to the interface will be a button, a drop-down list, a text field and a check box. This is shown in the following code:
import java.awt. *;
import javax.swing. *;
public class SwingClass4 extends SwingClass3
{
public SwingClass4 ( )
{
super( );
// add items to the botPanel
botPanel.add(new JTextField("TextField"));
botPanel.add(new JButton("Button"));
botPanel.add(new JCheckBox("Checkbox"));
JComboBox c = new JComboBox( );
c.addItem("Choice Item 1");
c.addItem("Choice Item 2");
c.addItem("Choice Item 3"); botPanel.add(c);
}
}
In the constructor, we simply employ the add method to insert elements into the bottom panel. Starting with the JTextField we create an instance with the default text value of "TextField". We then proceed to add a JButton, with the label on the button set to be the string "Button". We also add a JCheckBox in the same manner and then create a drop-down list using a JComboBox. Finally, the drop-down list is added to the JPanel. At this point, the interface is as shown in Figure.
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