Problema con com.jgoodies.forms

[AXLAV]

Buenas, estoy empezando el capitulo de uso de interfaces, y me adelanté un poco viendo que hay software que facilita esta posibilidad.
Me baje el JFrameDesigner, y puse tres texbox, nada complicado, y generé el código java que es este :

Código:

import java.awt.*;
import javax.swing.*;
import com.jgoodies.forms.factories.*;
import com.jgoodies.forms.layout.*;
/*
 * Created by JFormDesigner on Sun Feb 26 13:08:33 ART 2012
 */



/**
 * @author Axel
 */
public class java extends JFrame {
	
	public java() {
		initComponents();
	}

	private void initComponents() {
		// JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
		dialogPane = new JPanel();
		contentPanel = new JPanel();
		buttonBar = new JPanel();
		okButton = new JButton();
		cancelButton = new JButton();
		textField3 = new JTextField();
		textField4 = new JTextField();
		textField5 = new JTextField();

		//======== this ========
		Container contentPane = getContentPane();
		contentPane.setLayout(new BorderLayout());

		//======== dialogPane ========
		{
			dialogPane.setBorder(Borders.DIALOG_BORDER);
			dialogPane.setLayout(new BorderLayout());

			//======== contentPanel ========
			{
				contentPanel.setLayout(new FormLayout(
					"6*(default, $lcgap), default",
					"2*(default, $lgap), default"));
			}
			dialogPane.add(contentPanel, BorderLayout.NORTH);

			//======== buttonBar ========
			{
				buttonBar.setBorder(Borders.BUTTON_BAR_GAP_BORDER);
				buttonBar.setLayout(new FormLayout(
					"$glue, $button, $rgap, $button",
					"pref"));

				//---- okButton ----
				okButton.setText("OK");
				buttonBar.add(okButton, CC.xy(2, 1));

				//---- cancelButton ----
				cancelButton.setText("Cancel");
				buttonBar.add(cancelButton, CC.xy(4, 1));
			}
			dialogPane.add(buttonBar, BorderLayout.SOUTH);
			dialogPane.add(textField3, BorderLayout.WEST);
			dialogPane.add(textField4, BorderLayout.EAST);
			dialogPane.add(textField5, BorderLayout.CENTER);
		}
		contentPane.add(dialogPane, BorderLayout.CENTER);
		pack();
		setLocationRelativeTo(getOwner());
		// JFormDesigner - End of component initialization  //GEN-END:initComponents
	}

	// JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
	private JPanel dialogPane;
	private JPanel contentPanel;
	private JPanel buttonBar;
	private JButton okButton;
	private JButton cancelButton;
	private JTextField textField3;
	private JTextField textField4;
	private JTextField textField5;
	// JFormDesigner - End of variables declaration  //GEN-END:variables
}

El problema es que no se como solucionar el error que me tira en :

Código:

import com.jgoodies.forms.factories.*;
import com.jgoodies.forms.layout.*;

Seleccionandome com.jgoodies

Código:

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
	Borders cannot be resolved
	FormLayout cannot be resolved to a type
	Borders cannot be resolved
	FormLayout cannot be resolved to a type
	CC cannot be resolved
	CC cannot be resolved

Desde ya, les agradezco mucho su ayuda !

[AXLAV]

Baje la libreria de forms y me desaparece el error, pero aparece esto ahora

Exception in thread "main" java.lang.NoClassDefFoundError: com/jgoodies/common/base/SystemUtils
at com.jgoodies.forms.util.LayoutStyle.initialLayoutS tyle(LayoutStyle.java:73)
at com.jgoodies.forms.util.LayoutStyle.<clinit>(Layou tStyle.java:60)
at com.jgoodies.forms.factories.Borders.<clinit>(Bord ers.java:134)
at java.initComponents(java.java:37)
at java.<init>(java.java:17)
at Menu.main(Menu.java:12)
Caused by: java.lang.ClassNotFoundException: com.jgoodies.common.base.SystemUtils
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 6 more