Development of Menu Creation using Option Buttons
(Experiment 3)
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class ChoiceGroupMidlet extends MIDlet implements CommandListener, ItemStateListener
{
public ChoiceGroup ch;
public Form form;
public Display display;
public Command cmdExit;
public StringItem st;
public ChoiceGroupMidlet()
{
display = Display.getDisplay(this);
ch=new ChoiceGroup("Edit",Choice.EXCLUSIVE);
ch.append("cut",null);
ch.append("copy",null);
ch.append("paste",null);
ch.append("delete",null);
ch.append("select all",null);
ch.append("unselect all",null);
ch.setSelectedIndex(0, true);
form=new Form("");
form.append(ch);
st=new StringItem("","The selected Option is Cut");
form.append(st);
cmdExit = new Command("Exit",Command.OK,1);
form.addCommand(cmdExit);
form.setCommandListener(this);
form.setItemStateListener(this);
}
public void startApp() {
display.setCurrent(form);
}
public void pauseApp() {}
public void destroyApp(boolean unconditional) {}
public void commandAction(Command command,Displayable displayable) {
if(command == cmdExit)
{
destroyApp(true);
notifyDestroyed();
}
}
public void itemStateChanged(Item item)
{
st.setText("");
st.setText("The selected Option is " + ch.getString(ch.getSelectedIndex()));
form.append(st);
}
}
Output:
