multiple Choice List : List « J2ME « Java

multiple Choice List

multiple Choice List

* Create multiple choice list and save selection
* status of each element in an array.
* Example from the book:     Core J2ME Technology
* Copyright John W. Muchow
* You may use/modify for any non-commercial purpose
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class MultipleChoiceList extends MIDlet implements CommandListener
  private Display display;      // Reference to display object 
  private Command cmExit;      // A Command to exit the MIDlet
  private Command cmView;      // View the choice selected
  private List lsPrefs;        // Choice Group of preferences

  public MultipleChoiceList()
    display = Display.getDisplay(this);

    // Create a multiple choice list
    lsPrefs = new List("Preferences", List.MULTIPLE);
    // Append options, with no associated images
    lsPrefs.append("Auto Indent", null);
    lsPrefs.append("Replace Tabs", null);
    lsPrefs.append("Wrap Text", null);    

    cmExit = new Command("Exit", Command.EXIT, 1);
    cmView = new Command("View", Command.SCREEN,2);

    // Add commands, listen for events

  public void startApp()

  public void pauseApp()
  { }
  public void destroyApp(boolean unconditional)
  { }

  public void commandAction(Command c, Displayable s)
    if (c == cmView)
      boolean selected[] = new boolean[lsPrefs.size()];
      // Fill array indicating whether each element is checked 
      for (int i = 0; i < lsPrefs.size(); i++)
        System.out.println(lsPrefs.getString(i) + (selected[i] ? ": selected" : ": not selected"));

    else if (c == cmExit)


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