I need some help merging JBuilder book skills 12 and 17 so I can demonstrate bound properties with a menu driven app.

I'm having trouble with my component file that has the bound properties in it though, code follows:-

			

			import java.awt.*;
			

				

				import javax.swing.JPanel;
			
			

				

				import java.beans.*;
			
			

				

				import java.awt.font.*;
			
			

				

				import java.awt.geom.*;
			
			

				

			
			

				

				public class GreenBox extends JPanel {
			
			

				

			
			

				

				public GreenBox() {
			
			

				

				setBackground(Color.white);
			
			

				

				setForeground(Color.black);
			
			

				

				setText("Help meeeeeeee!");
			
			

				

				}
			
			

				

			
			

				

				private String text;
			
			

				

				private java.awt.Font font;
			
			

				

				private java.awt.Color foreground;
			
			

				

			
			

				

				private transient PropertyChangeSupport propertyChangeListeners =
				

				new PropertyChangeSupport(this);
				

			
			

				

				public void setText(String text) {
			
			

				

				String  oldText = this.text;
			
			

				

				this.text = text;
			
			

				

				propertyChangeListeners.firePropertyChange("text", oldText, text);
			
			

				

				repaint();
			
			

				

				}
			
			

				

				public String getText() {
			
			

				

				return text;
			
			

				

				}
			
			

				

			
			

				

				public void setFont(java.awt.Font font) {
			
			

				

				java.awt.Font  oldFont = this.font;
			
			

				

				this.font = font;
			
			

				

				propertyChangeListeners.firePropertyChange("font", oldFont, font);
			
			

				

				repaint();
			
			

				

				}
			
			

				

				public java.awt.Font getFont() {
			
			

				

				return font;
			
			

				

				}
			
			

				

			
			

				

				public void setForeground(java.awt.Color foreground) {
			
			

				

				java.awt.Color  oldForeground = this.foreground;
			
			

				

				this.foreground = foreground;
			
			

				

				propertyChangeListeners.firePropertyChange("foreground", oldForeground, foreground);
			
			

				

				repaint();
			
			

				

				}
			
			

				

				public java.awt.Color getForeground() {
			
			

				

				return foreground;
			
			

				

				}
			
			

				

			
			

				

				public synchronized void addPropertyChangeListener(PropertyChangeListener l) {
			
			

				

				super.addPropertyChangeListener(l);
			
			

				

				propertyChangeListeners.addPropertyChangeListener(l);
			
			

				

				}
			
			

				

				public synchronized void removePropertyChangeListener(PropertyChangeListener
				

				l) {
			
			

				

				super.removePropertyChangeListener(l);
			
			

				

				propertyChangeListeners.removePropertyChangeListener(l);
			
			

				

				}
			
			

				

				}
			
		

this produces "java.lang.NullPointerException new GreenBox()"

and ""MenuTester.java": Error #: 300 : method setForeground(java.lang.String) not found in class exercise1.GreenBox at line 198, column 17.

Any ideas?

Thanks