Using list with GridBagLayout and GridBagConstraints

import java.awt.*;
import java.applet.Applet;

public class UsageList extends Applet {
    TextArea output;
    List listOne, listTwo; 

    public void init() {

        //Build first list 
        listOne = new List(4, true);  
        listOne.addItem("x1");
        listOne.addItem("x2");
        listOne.addItem("x3");
        listOne.addItem("x4");
        listOne.addItem("x5");
        listOne.addItem("x6");
        listOne.addItem("x7");

         
        listTwo = new List();  
        listTwo.addItem("y1");
        listTwo.addItem("y2");
        listTwo.addItem("y3");
        listTwo.addItem("y4");
        listTwo.addItem("y5");
        listTwo.addItem("y6");
        listTwo.addItem("y7");

        //Add lists to the Applet. 
        GridBagLayout badLayout = new GridBagLayout();
        setLayout(badLayout);

          
        output = new TextArea(10, 40);
        output.setEditable(false);
        GridBagConstraints gridBagConstrain = new GridBagConstraints();
        gridBagConstrain.fill = GridBagConstraints.BOTH;
        gridBagConstrain.weightx = 1.0;
        gridBagConstrain.weighty = 1.0;
        gridBagConstrain.gridheight = 2;
        badLayout.setConstraints(output, gridBagConstrain);
        add(output);

        GridBagConstraints bagConstrain = new GridBagConstraints();
        bagConstrain.fill = GridBagConstraints.VERTICAL;
        bagConstrain.gridwidth = GridBagConstraints.REMAINDER; //end row
        badLayout.setConstraints(listOne, bagConstrain);
        add(listOne);
        badLayout.setConstraints(listTwo, bagConstrain);
        add(listTwo);

        validate();
    }

    public boolean action(Event e, Object arg) {
        if (e.target instanceof List) {
            String language = (e.target == listOne) ?
                              "listOne" : "listTwo";
            output.appendText("Action event occurred on \""
                              + (String)arg  + "\" in "
                              + language + ".\n");
	}
	return true;
    }

    public boolean handleEvent(Event e) {
        if (e.target instanceof List) {
            List list = (List)(e.target);
            String language = (list == listOne) ?
                              "listOne" : "listTwo";

            switch (e.id) {
              case Event.LIST_SELECT:
                int sIndex = ((Integer)e.arg).intValue();
                output.appendText("Select event occurred on item #"
                                  + sIndex + " (\""
                                  + list.getItem(sIndex)  + "\") in "
                              + language + ".\n");
                break;
              case Event.LIST_DESELECT:
                int dIndex = ((Integer)e.arg).intValue();
                output.appendText("Deselect event occurred on item #"
                                  + dIndex + " (\""
                                  + list.getItem(dIndex)  + "\") in "
                              + language + ".\n");
            }
        }
        return super.handleEvent(e);
    }
}