[Java] Applet getParameter() Null-Pointer

java.lang.NullPointerException
 at java.applet.Applet.getParameter(Unknown Source)
 at view.ZwischenablageUploader.initGUI(ZwischenablageUploader.java:79)
 at view.ZwischenablageUploader.<init>(ZwischenablageUploader.java:60)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
 at java.lang.reflect.Constructor.newInstance(Unknown Source)
 at java.lang.Class.newInstance0(Unknown Source)
 at java.lang.Class.newInstance(Unknown Source)
 at sun.applet.AppletPanel.createApplet(Unknown Source)
 at sun.applet.AppletPanel.runLoader(Unknown Source)
 at sun.applet.AppletPanel.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)

package view;
import java.util.Vector;

import javax.swing.ComboBoxModel;
import javax.swing.DefaultComboBoxModel;
import javax.swing.GroupLayout;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JProgressBar;
import javax.swing.LayoutStyle;
import javax.swing.SwingUtilities;

import logic.get.GalleryNameClient;
import logic.model.Gallery;
import view.listener.UploadButtonActionListener;
import view.text.Text;

/**
 * Grafical user interface of the clipboarduploader
 * @author Frank Roth
 *
 */
public class ZwischenablageUploader extends JApplet {

 private static final long serialVersionUID = -1812729455663662739L;
 private static JButton uploadButton;
 private static JProgressBar progressBar;
 private JLabel jLabel2;
 private JComboBox galleriesComboBox;
 private JLabel jLabel3;
 private static ZwischenablageUploader applet;

 {
 //Set Look & Feel
 try {
 javax.swing.UIManager.setLookAndFeel(javax.swing.UIManager.getSystemLookAndFeelClassName());
 } catch(Exception e) {
 e.printStackTrace();
 }
 }
 
 public ZwischenablageUploader() {
 super();
 initGUI();
 }
 
 private void initGUI() {
 try {
 GroupLayout thisLayout = new GroupLayout((JComponent)getContentPane());
 getContentPane().setLayout(thisLayout);
 
 uploadButton = new JButton();

 uploadButton.setText(Text.TEXT_UPLOAD_BUTTON);
 {
 jLabel2 = new JLabel();
 jLabel2.setText("hochladen in Gallery");
 }
 {
 // Init gallery names
 Vector<Gallery> galleryVector = new Vector<Gallery>();
 String galleriesString = new String();
 [COLOR="Red"]galleriesString = getParameter("galleries");[/COLOR]
 System.out.println("Debug");
 if(galleriesString != null){
 String galleries[] = galleriesString.split("[\\[\\]]+");
 galleryVector.add(new Gallery("", "---- keine ----"));
 for(String key : galleries){
 galleryVector.add(GalleryNameClient.getGalleryByKeyname(key));
 }
 }
 
 ComboBoxModel galleriesComboBoxModel = new DefaultComboBoxModel(galleryVector);
 galleriesComboBox = new JComboBox();
 galleriesComboBox.setModel(galleriesComboBoxModel);
 }
 {
 jLabel3 = new JLabel();
 jLabel3.setText("bereits hochgeladen");
 }
 uploadButton.addActionListener(new UploadButtonActionListener());
 
 progressBar = new JProgressBar();
 progressBar.setStringPainted(true);
 thisLayout.setVerticalGroup(thisLayout.createSequentialGroup()
 .addComponent(jLabel2, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE)
 .addComponent(galleriesComboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE)
 .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
 .addComponent(jLabel3, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE)
 .addComponent(progressBar, GroupLayout.PREFERRED_SIZE, 22, GroupLayout.PREFERRED_SIZE)
 .addComponent(uploadButton, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE));
 thisLayout.setHorizontalGroup(thisLayout.createParallelGroup()
 .addGroup(GroupLayout.Alignment.LEADING, thisLayout.createSequentialGroup()
 .addComponent(jLabel2, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE)
 .addGap(0, 326, Short.MAX_VALUE))
 .addComponent(galleriesComboBox, GroupLayout.Alignment.LEADING, 0, 422, Short.MAX_VALUE)
 .addGroup(GroupLayout.Alignment.LEADING, thisLayout.createSequentialGroup()
 .addComponent(jLabel3, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE)
 .addGap(0, 325, Short.MAX_VALUE))
 .addComponent(progressBar, GroupLayout.Alignment.LEADING, 0, 422, Short.MAX_VALUE)
 .addComponent(uploadButton, GroupLayout.Alignment.LEADING, 0, 422, Short.MAX_VALUE));

 applet = this; 
 this.setSize(422, 99);
 getContentPane().setBackground(new java.awt.Color(255,255,255));
 } catch (Exception e) {
 e.printStackTrace();
 }
 }

 public static JProgressBar getProgressBar() {
 return progressBar;
 }

 public static JButton getUploadButton() {
 return uploadButton;
 }

 public static ZwischenablageUploader getApplet() {
 return applet;
 }
 
 public static void main(String[] args) {
 SwingUtilities.invokeLater(new Runnable() {
 public void run() {
 ZwischenablageUploader inst = new ZwischenablageUploader();
 inst.setVisible(true);
 }
 });
 } 
}

<applet code="view/ZwischenablageUploader.class" archive="ZwischenablageUploader.jar" width="100%" height="60">
 <param name="session" value="0d02fc1b7f9c684c16a2bb6cbc281a88"/>
 <param name="galleries" value="c304ab3,c217762,9afb8a4,baf52fe,d1ea2a5,924d2a,d24af88"/>
</applet>