An adapter class provides an empty implementation of all methods in an event listener interface. Adapter classes are useful when you want to receive and process only some of the events that are handled by a particular event listener interface. You can define a new class to act listener by extending one of the adapter classes and implementing only those events in which you are interested. For example, the MouseMotionAdapter class has two methods, mouseDragged()and mouseMoved(). The signatures of these…

Read More Read More

getState().getState() In Core Java, to determine if a Checkbox is checked, you can use the isSelected() method. The isSelected() method returns a boolean value that indicates whether the Checkbox is currently in the checked state or not. Here’s an example: java import java.awt.*; import java.awt.event.*;public class CheckboxExample { public static void main(String[] args) { Frame frame = new Frame(“Checkbox Example”); Checkbox checkbox = new Checkbox(“Check me”); checkbox.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { if (checkbox.isSelected()) { System.out.println(“Checkbox is checked”);…

Read More Read More