Java class to create Swing Application from Array of data

package ws;   //Comment out or replace with own package declaration
import javax.swing.*;          //This is the final package name.
//import com.sun.java.swing.*; //Used by JDK 1.2 Beta 4 and all
                               //Swing releases before Swing 1.1 Beta 3.
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class CallSapSwing extends JApplet implements ActionListener, ItemListener {
    private String labelPrefix = "Material:";
    private int numClicks = 0;
    Object type;
	ArrayList gdArrList = new ArrayList();
	public CallSapSwing (){
	}
	
	public CallSapSwing (ArrayList myArrList){	
		gdArrList = myArrList;
	}
	
	public CallSapSwing (String val){	
		labelPrefix = val;
	}
	
    public Component createComponents() {
        final JLabel label = new JLabel(labelPrefix + "0    ");
		final JLabel label2 = new JLabel(labelPrefix + "1    ");
		String text;
		JPanel pane = new JPanel();
		pane.setBorder(BorderFactory.createEmptyBorder(
							30, //top
							30, //left
							10, //bottom
							30) //right
								);
		pane.setLayout(new GridLayout(0, 1));
		
		type = gdArrList.get(0).toString();  //Set default
		Choice conversion = new Choice();
		{
			for (int loop = 0; loop < gdArrList.size(); loop++){
				conversion.add(gdArrList.get(loop).toString());
				conversion.addItemListener(this);
			}
		}
				
		pane.add(conversion);
	
		JButton button = new JButton("Display Material");
        button.setMnemonic(KeyEvent.VK_I);
        button.addActionListener(new ActionListener() {
			
            public void actionPerformed(ActionEvent e) {
                numClicks++;
               label.setText( labelPrefix + type);
            }
        });
        label.setLabelFor(button);
        pane.add(button);
        pane.add(label);
		label.setText("Material:");
		pane.add(label);
		
		return pane;
    }
	public void itemStateChanged(ItemEvent ie) {
	type = ie.getItem();
	}
	public void actionPerformed(ActionEvent ea) {
	}
}