Local Storageの容量取得

import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.Graphics;
import javax.tv.xlet.Xlet;
import javax.tv.xlet.XletContext;
import org.bluray.storage.DataAreaInfo;
import org.bluray.storage.StorageManager;
import org.havi.ui.HScene;
import org.havi.ui.HSceneFactory;
import org.havi.ui.HScreen;
 
public class Main extends Container implements Xlet{
    int x = 100, y = 100;
 
    public void initXlet(XletContext xc){
        try {
            Font font = new Font(null, java.awt.Font.BOLD, 48);
            HScene hs= HSceneFactory.getInstance().getFullScreenScene(
                    HScreen.getDefaultHScreen().getDefaultHGraphicsDevice());
            hs.setFont(font);
            hs.setVisible(true);
            Graphics g = hs.getGraphics();
            g.setColor(Color.white);
            // StorageManagerを取得
            StorageManager sm = StorageManager.getInstance();
            // BUDAおよびADAのDataAreaInfoを取得
            DataAreaInfo BudaI = sm.getBindingunitDataAreaInfo();
            DataAreaInfo AdaI = sm.getPersistentDataAreaInfo();
            g.drawString("BUDA  free/total[byte]: "+BudaI.getFreeSpace()+" / "+BudaI.getTotalSpace(), x, y); y+=50;
            g.drawString("ADA  free/total[byte]: "+AdaI.getFreeSpace()+" / "+AdaI.getTotalSpace(), x, y); y+=50;
 
        } catch (Exception e){
        }
    }
    public void startXlet(){}
    public void pauseXlet(){    }
    public void destroyXlet(boolean unconditional){ }