AWT CONTROLS IN JAVA:CHECK BOXES

A check box is a graphical component that can be in either an "on" (true) or "off" ........

Applying checkbox

A check box is a control that is used to turn an option on or off. It consists of a small box that can either contain a check mark or not. There is a label associated with each check box that describes what option the box represents. You change the state of a check box by clicking on it. Check boxes can be used individually or as part of a group. Check boxes are objects of the Checkbox class.A check box is a graphical component that can be in either an "on" (true) or "off" (false) state. Clicking on a check box changes its state from "on" to "off," or from "off" to "on."

Checkbox supports these constructors:

• Checkbox():

               Creates a check box with an empty string for its label.

• Checkbox(String label):

                 Creates a check box with the specified label.

• Checkbox(String label, boolean state):

                   Creates a check box with the specified label and sets the specified state.

• Checkbox(String label, boolean state, CheckboxGroup group):

                   Constructs a Checkbox with the specified label, set to the specified state, and in the specified check box group.

• Checkbox(String label, CheckboxGroup group, boolean state):

                   Creates a check box with the specified label, in the specified check box group, and set to the specified state
.

methods

• getLabel():    Gets the label of this check box.

syntax:
       boolean getState()

• setLabel(String label) :   Sets this check box's label to be the string argument.

Syntax:
          void setLabel(String str)

• getState():   Determines whether this check box is in the "on" or "off" state.

syntax:
       boolean getState()

• setState(boolean on):    Sets the state of this check box to the specified state.

syntax:
      void setState(String str)

sample program for applying checkboxes

import java.awt.*; 
import java.applet.Applet;  
public class MyCheckbox extends Applet 
{ 
  public void init()
 { 
  Checkbox c = new Checkbox("Choose this option"); 
  add(c); 
  } 
} 

output of this sample program: