Java AWT Checkbox
Last Updated :
23 Oct, 2023
Java AWT (Abstract Window Toolkit) provides a really various set of tools for edifice in writing user interfaces (GUIs), and among these tools is the Checkbox class. Checkboxes are necessary components for user interactions, allowing users to work binary choices easily. In this clause, we’ll search the Checkbox class, its constructors, and methods, and supply examples of creating checkboxes with really different logic.
Java AWT Checkbox Class Declaration
The Checkbox class in Java AWT is secondhand to create checkboxes, which represent options that users can either select or deselect. Clicking on a checkbox toggles its submit between “on” (selected) and “off” (deselected).
The sort-out is explicit as follows:
public class Checkbox extends Component implements ItemSelectable, Accessible
Constructors of Checkbox class
Creates a checkbox with no label.
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Creates a checkbox with the specified label.
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Creates a checkbox with the given label and sets the initial state.
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Creates a checkbox with the specified label, state, and associates it with a CheckboxGroup.
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Creates a checkbox with the given label, associates it with the specified CheckboxGroup, and sets the initial state.
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Methods of checkbox class are inherited by two classes:
- java.awt.Component
- java.lang.Object
Key Methods of Checkbox class
Adds the specified item listener to receive events when the state of the checkbox changes.
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Retrieves the accessible context for enhanced interaction with assistive technologies for the checkbox.
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Creates the peer of the checkbox for rendering purposes.
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Retrieves the associated CheckboxGroup to which the checkbox belongs.
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Returns an array of registered item listeners responsible for handling item events of the checkbox.
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Retrieves the label associated with the checkbox.
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Returns an array containing the label of the checkbox if it is selected; otherwise, returns null.
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Returns true if the checkbox is in the selected state; otherwise, returns false.
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Generates a string representation of the state and properties of the checkbox.
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Processes the general events occurring on the checkbox.
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Processes the item events occurring in the checkbox by dispatching them to registered ItemListener objects.
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Removes the specified item listener to stop receiving item events from the checkbox.
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Sets the checkbox’s group to the specified CheckboxGroup.
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Sets the label of the checkbox to the specified string argument.
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Sets the state of the checkbox to the specified state, either selected (true) or deselected (false).
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Example of Java AWT Checkbox
Example 1:
Java
import java.awt.*;
public class one {
public one() {
Frame frame = new Frame( "Simple Checkbox Example" );
Checkbox checkbox = new Checkbox( "Agree to geeksforgeeks terms and conditions" );
checkbox.setBounds( 50 , 50 , 250 , 30 );
frame.add(checkbox);
frame.setSize( 400 , 200 );
frame.setLayout( null );
frame.setVisible( true );
}
public static void main(String[] args) {
new one();
}
}
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Output:
Example 2:
Java
import java.awt.*;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
public class one {
public one()
{
Frame frame = new Frame(
"Checkbox with ItemListener Example" );
Checkbox checkbox = new Checkbox( "Enable Feature" );
checkbox.setBounds( 50 , 50 , 150 , 30 );
checkbox.addItemListener( new ItemListener() {
public void itemStateChanged(ItemEvent e)
{
if (checkbox.getState()) {
System.out.println(
"Feature is enabled" );
}
else {
System.out.println(
"Feature is disabled" );
}
}
});
frame.add(checkbox);
frame.setSize( 400 , 200 );
frame.setLayout( null );
frame.setVisible( true );
}
public static void main(String[] args) { new one(); }
}
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Output
When check box gets unchececked
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