// 2 points total for the imports
import java.awt.*;
import java.awt.event.*;

// 2 points for extending Frame
public class GUI extends Frame{
    // 1 point for each widget
    Choice myChoice;
    Label myLabel;
    
    public GUI(){
        // 2 point for the set size
        setSize(100, 100);
        // 2 points for the BorderLayout
        setLayout(new BorderLayout());
        
        // 3 points for choice setup
        myChoice = new Choice();
        myChoice.add("Red");
        myChoice.add("Green");
        myChoice.add("Blue");
        // 1 point for label setup
        myLabel = new Label("Hello.");
        
        // 2 points for each addition
        add("North", myLabel);
        add("South", myChoice);
        
        // 2 points for each listener addition
        myChoice.addItemListener(new MyChoiceHandler());
        addWindowListener(new MyWindowHandler());
    }
    
    // 2 points for using an inner class which implements ItemListener 
    protected class MyChoiceHandler implements ItemListener{
        // 1 point for implementing the itemChanged method
        public void itemStateChanged(ItemEvent e){
            // 1 point for setting the correct text
            myLabel.setText(myChoice.getSelectedItem());
        }
    }
    
    // 2 points for a class that extends WindowAdapter
    // they can implement WindowListener but need to write all 7 methods
    protected class MyWindowHandler extends WindowAdapter{
        // 1 point for implementing the windowClosing method
        public void windowClosing(WindowEvent e){
            // 1point for the System.exit(0)
            System.exit(0);
        }
    }

    // 2 points for getting the main program right
    public static void main(String[] args){
        new GUI().show();
        
        // could also do this
        // GUI myGui = new GUI();
        // myGui.show();
    }
}