?? listing 6-28.java
字號:
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class ListRadioButtons extends MIDlet implements CommandListener
{
private Display display;
private Command exit;
private Command submit;
private List list;
public ListRadioButtons()
{
display = Display.getDisplay(this);
list = new List("Select one", List.EXCLUSIVE);
list.append("Male", null);
list.append("Female", null);
exit = new Command("Exit", Command.EXIT, 1);
submit = new Command("Submit", Command.SCREEN,2);
list.addCommand(exit);
list.addCommand(submit);
list.setCommandListener(this);
}
public void startApp()
{
display.setCurrent(list);
}
public void pauseApp()
{
}
public void destroyApp(boolean unconditional)
{
}
public void commandAction(Command command, Displayable Displayable)
{
if (command == submit)
{
Alert alert = new Alert("Choice",
list.getString(list.getSelectedIndex()),
null, null);
alert.setTimeout(Alert.FOREVER);
alert.setType(AlertType.INFO);
display.setCurrent(alert);
list.removeCommand(submit);
}
else if (command == exit)
{
destroyApp(false);
notifyDestroyed();
}
}
}
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