Runtime Error that Seems to be Related to Dialog Boxes

Question

Although I am currently taking a college course in Java and my code is based on a couple of questions from my Java textbook, I would like to make it perfectly clear that this is NOT homework. This is self-assigned for studying purposes and my professor will probably never see this, let alone grade it. Regardless, I suspect this to be a configuration-related issue as I had no such problems running this program in a Vista machine on campus. Assuming I am right, there shouldn't be any issue with any of this community's policies as I won't need to receive any "answer" code to solve this issue.
In NetBeans, my program compiles and works fine, but produces a couple of runtime errors. Any idea what could be going on here?
Here's my code:
import java.util.Scanner;       // Needed for console input.
import javax.swing.JOptionPane; // Needed for dialog boxes.
   This program performs the actions requested in questions 2.35 and 2.36 in the textbook.
* @author Dan
public class Pages98To99 {
    public static void main(String[]args){
        // Asks the user for what answer he/she wants to see.
        System.out.println("Do you want to see the answer to 2.35 or 2.36?");
        Scanner keyboard = new Scanner(System.in);  // Creates a scanner object.
        double answer = keyboard.nextDouble();
        if (answer == 2.35){
            //2.35
            JOptionPane.showMessageDialog(null, "Greetings Earthling.");
            JOptionPane.showInputDialog("Enter a number.");}
        else if (answer == 2.36){
            //2.36
            String str = JOptionPane.showInputDialog("Please enter your age.");
                                                 // Gets age.
            int age = Integer.parseInt(str);}    /* Converts age from a string to an
                                                    integer.*/
        else
            JOptionPane.showMessageDialog(null, "Go to another program.");
        System.exit(0); // Ends the program
}Here are the runtime errors produced by NetBeans:
2010-02-15 21:23:54.659 java[3891] CFLog (0): CFMessagePort: bootstrap_register(): failed 1103 (0x44f), port = 0xf203, name = 'java.ServiceProvider' See /usr/include/servers/bootstrap_defs.h for the error codes. 2010-02-15 21:23:54.660 java[3891] CFLog (99): CFMessagePortCreateLocal(): failed to name Mach port (java.ServiceProvider)The following is a troubleshooting terminal session using both the newer version of JDK courtesy of SoyLatte ( [http://landonf.bikemonkey.org/static/soylatte/|http://landonf.bikemonkey.org/static/soylatte/] ), which fails to produce a dialog box) as well as the older one supplied by Apple as part of my OS (which like in NetBeans works fine otherwise) as well.
Last login: Sat Feb 20 00:12:55 on ttyp1
Welcome to Darwin!
Dans-MacBook:~ Dan$ cd /Volumes/Lexar/NetBeansProjects/MacBook-Made/test/;echo $PATH;java -version;javac -version;javac Pages98To99.java;java Pages98To99;PATH=/sw/bin:/sw/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/X11R6/bin;java -version;javac -version;javac Pages98To99.java;java Pages98To99
/sw/bin:/sw/sbin:/Applications/soylatte16-i386-1.0.3/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/X11R6/bin
java version "1.6.0_03-p3"
Java(TM) SE Runtime Environment (build 1.6.0_03-p3-landonf_19_aug_2008_14_55-b00)
Java HotSpot(TM) Server VM (build 1.6.0_03-p3-landonf_19_aug_2008_14_55-b00, mixed mode)
javac 1.6.0_03-p3
Do you want to see the answer to 2.35 or 2.36?
0
Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:169)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
        at sun.awt.X11.XToolkit.(XToolkit.java:89)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:169)
        at java.awt.Toolkit$2.run(Toolkit.java:836)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:828)
        at sun.swing.SwingUtilities2$AATextInfo.getAATextInfo(SwingUtilities2.java:120)
        at javax.swing.plaf.metal.MetalLookAndFeel.initComponentDefaults(MetalLookAndFeel.java:1556)
        at javax.swing.plaf.basic.BasicLookAndFeel.getDefaults(BasicLookAndFeel.java:130)
        at javax.swing.plaf.metal.MetalLookAndFeel.getDefaults(MetalLookAndFeel.java:1591)
        at javax.swing.UIManager.setLookAndFeel(UIManager.java:537)
        at javax.swing.UIManager.setLookAndFeel(UIManager.java:577)
        at javax.swing.UIManager.initializeDefaultLAF(UIManager.java:1331)
        at javax.swing.UIManager.initialize(UIManager.java:1418)
        at javax.swing.UIManager.maybeInitialize(UIManager.java:1406)
        at javax.swing.UIManager.getDefaults(UIManager.java:656)
        at javax.swing.UIManager.getString(UIManager.java:802)
        at javax.swing.UIManager.getString(UIManager.java:819)
        at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:592)
        at Pages98To99.main(Pages98To99.java:29)
java version "1.5.0_19"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_19-b02-306)
Java HotSpot(TM) Client VM (build 1.5.0_19-138, mixed mode, sharing)
javac 1.5.0_19
javac: no source files
Usage: javac 
where possible options include:
  -g                         Generate all debugging info
  -g:none                    Generate no debugging info
  -g:{lines,vars,source}     Generate only some debugging info
  -nowarn                    Generate no warnings
  -verbose                   Output messages about what the compiler is doing
  -deprecation               Output source locations where deprecated APIs are used
  -classpath           Specify where to find user class files
  -cp                  Specify where to find user class files
  -sourcepath          Specify where to find input source files
  -bootclasspath       Override location of bootstrap class files
  -extdirs             Override location of installed extensions
  -endorseddirs        Override location of endorsed standards path
  -d              Specify where to place generated class files
  -encoding        Specify character encoding used by source files
  -source           Provide source compatibility with specified release
  -target           Generate class files for specific VM version
  -version                   Version information
  -help                      Print a synopsis of standard options
  -X                         Print a synopsis of nonstandard options
  -J                   Pass  directly to the runtime system
Do you want to see the answer to 2.35 or 2.36?
0
2010-02-20 00:16:09.967 java[4618] CFLog (0): CFMessagePort: bootstrap_register(): failed 1103 (0x44f), port = 0xf103, name = 'java.ServiceProvider'
See /usr/include/servers/bootstrap_defs.h for the error codes.
2010-02-20 00:16:09.968 java[4618] CFLog (99): CFMessagePortCreateLocal(): failed to name Mach port (java.ServiceProvider)
Dans-MacBook:/Volumes/Lexar/NetBeansProjects/MacBook-Made/test Dan$ Edited by: Viewer07 on Mar 6, 2010 12:15 AM

Answer 1

In terminal I've been using a JDK from Soylatte. I haven't tampered with the JDK that NetBeans uses.
About NetBeans (from the menubar returns the following):
Product Version: NetBeans IDE 6.8 (Build 200912041610)
Java: 1.5.0_19; Java HotSpot(TM) Client VM 1.5.0_19-138
System: Mac OS X version 10.4.11 running on i386; MacRoman; en_US (nb)
Userdir: /Users/Dan/.netbeans/6.8