Knute Snortum

This is probably the problem:
if (line.equals(null)){ I don't think this will ever be true.  What you probably want:
if (line == null){

What have you tried?  What happened?

Thinking about it a second, I think all you need is
while(! input.equalsIgnoreCase("gasoline") && ! input.equalsIgnoreCase("diesel")); Scanner#nextLine() never returns null (AFAIK) and the case of input being empty is caught anyway.

I would write that line more like this:
while(input.length()==0     || input.isEmpty()     || (! input.equalsIgnoreCase("gasoline") && ! input.equalsIgnoreCase("diesel"))); Things to notice: I am using the logical or (||) and and (&&) instead of the bitwise or (^).  I also distributed the negation (!) to inside the parentheses because I think it reads better (the input is not equal to gasoline and not equal to diesel).

Campbell Ritchie wrote:

Knute Snortum wrote:. . . This method calls a constructor that hasn't been declared. . . . .

How can you call a constructor from a method?

...um, you can't.  *blush*

There are these things that won't compile:
    public boolean selfTest(int weight)     {     } This method needs to return a boolean type.
    public boolean selfTest()     {         this(DEFAULT_WEIGHT);     } This method calls a constructor that hasn't been declared.
    public static void main(String[] args)     {         int weight = 0;         if(args.length > 0)         {         ...         }         Foo f = new Foo();         boolean result = f.selfTest(weight);         System.out.println(result ? "Success" : "Failure");     } } Not a compiler error, but this will run without complaint if there are no command line arguments.

     ArrayList ms = new ArrayList(); ...     Integer[] obj=new Integer[ms.size()];      obj= ms.toArray();        //obj returns the array of missing numbers           return obj; Here you have a raw ArrayList that you try to convert to an Integer array which you then try to convert to an int array.  Neither of those is going to work.

I would declare ms like this: List<Integer> ms = new ArrayList<>(); ...then return ms.  But you would have to change the return type of your method and modify how the class uses the method.

I decided to not look too hard at your solution until I tried mine and see if we were close.  I was surprised by how different they were.  Mine uses the launching class Main to hold a static Map of all the scenes, all build on the launch.  I then inject the one stage into the views and controllers.  I don't have a Map of controllers.  If you're interested in seeing what I did, it's on GitHub.  I may try using FXML next time as this is my favorite way to create views.

Several of the entries in the HowToAskQuestionsOnJavaRanch FAQ recommend copying and pasting code and configuration settings into the edit screen instead of typing them.

Here are some tips for capturing system information such as environment variables and directory structures in a Windows environment.
This FAQ entry is aimed primarily at Windows users. Most modern Unix shell windows allow copying and pasting so the  results from the "ls -R" and "echo" commands are easy to grab.
Copying an environment variable PATH, CLASSPATH, JAVA_HOME, etc..
For Windows (from the command line)

echo %CLASSPATH% > my-classpath.txt

This will open up a text file containing your CLASSPATH environment variable in notepad; where it will be easy to copy to your clipboard.

Copying a directory structure

In this example, we're going to write the entire directory structure of the "ROOT" webapp that
ships with Apache Tomcat (assuming that the current working directory is {tomcat install}\webapps):

dir /b /s ROOT > my-directory-structure.txt

When pasting the results into the JavaRanch edit screen be sure to UseCodeTags to insure that everything is rendered as plain text with all indenting preserved.

See the other tips on HowToAskQuestionsOnJavaRanch.

---

See also

AvoidRedHerrings

PostRealCode

Thanks for posting the solution!

Couldn't you simplify validateEnteredData to
return ! tfAnnualInterestRate.getText().trim().isEmpty() &&   ! tfNumberOfYears.getText().trim().isEmpty() &&   ! tfLoanAmount.getText().trim().isEmpty())

I'm not very familiar with Java EE, but I would think that you would want all three built by Maven or some build control system.  I've added this thread to the Java EE forum.

Congratulations, Pete!

If the jars aren't under the Maven Dependencies pull down then there're not from the pom file.  I've never heard of Eclipse adding jars during a conversion to Maven.  I've added this thread to the Eclipse forum to see if anyone has an idea.

I'm interested in your solution.  Post back here what you did and how it worked when you're done.