Articles : JavaBoutique's Introduction to Java :
Components :

Check Boxes and Check Box Groups

The Check Box and Check Box Groups are very familiar components which allow a user to make a choice between several options. The Check Box component is used to give the user the ability to select or unselect some choice. The Check Box group allows the developer to group a set of check boxes in such a way that only one check box can be selected at any one time (On day one, we saw this type of widget in HTML FORM programming under the name "RADIO"). In the following example we create both single check boxes and checkboxes in a group. Notice that you can select or unselect AFC or JDK without affecting any other check boxes. However, you can choose only male or female from the sex group.

import java.awt.*;

public class CheckExample
  {
  public static void main(String[] args)
    {
    Frame baseFrame = new Frame();
    baseFrame.setLayout(new GridLayout(4,1));
    baseFrame.reshape(10,10,200,200);
    baseFrame.setTitle("Check Example");

    Checkbox jdkChoice = new Checkbox("JDK");
    Checkbox afcChoice = new Checkbox("AFC");

    CheckboxGroup sexGroup = new CheckboxGroup();
    Checkbox maleChoice = new Checkbox("male",
         sexGroup, false);
    Checkbox femaleChoice = new Checkbox("Female",
	 sexGroup, false);

    baseFrame.add(jdkChoice);
    baseFrame.add(afcChoice);
    baseFrame.add(maleChoice);
    baseFrame.add(femaleChoice);

    baseFrame.show();
    }
  }

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Selena Sol contributes to the JavaBoutique's Introduction to Java. Selena currently works for Barclays Capital in London, one of the leading global investment banks in Europe and has worked as a software developer for the National Center for Human Genome research, Microline Software, Neuron Data, and Electric Eye in Singapore. Selena is perhaps best-known for creating the Public Domain Web Script Archive (Extropia) and writing several books on Web Programming (Perl, CGI, Java).
Email: selena@extropia.com