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typetypetypetype
Courses Plus Student 1,033 Pointsjava.util.NoSuchElementException (not a duplicate request AFAIK)
Hello, I'm working on helper Methods and Constructs and am stuck on the step 3 minutes in.
Respectfully, there's a lot of other threads but they don't seem to pertain to my issue or are too complicatedly explained.
Snapshot of workspace: https://w.trhou.se/p8lznlm35r
Code:
public class PezDispenser {
public static final int MAX_PEZ = 12;
private String mCharacterName;
private
public PezDispenser(String characterName) {
mCharacterName = characterName;
mPezCount = 0;
}
public boolean isEmpty() {
return mPezCount ==0;
}
public void load {
mPezCount = MAX_PEZ;
}
public String getCharacterName() {
return mCharacterName;
}
}
And error strings:
java> :load PezDispener.java
Could not load source file from PezDispener.java.
java.io.FileNotFoundException: PezDispener.java (No such file or directory)
java> :load PezDispenser.java
Loaded source file from PezDispenser.java
java> PezDispenser pd = new PezDispenser
java.util.NoSuchElementException
2 Answers
Craig Dennis
Treehouse TeacherHave you tried to compile that code?
The 5th line of code there has a bare keyword
private
You also need to include the ( and ) when creating a new instance.
PezDispenser pd = new PezDispenser();
Hope that helps!
typetypetypetype
Courses Plus Student 1,033 PointsHi,
I followed the directions in the video, how did you compile the code? In previous lessons you used the clear && javac NAME.java && jave NAME to run the script. It's my understanding javac was the command to compile.
In the video, we're inside repl, and you never use the javac command.
In the video you use:
:load PezDispenser.java
If you look in my error code, I did that, twice (first time had an error due to MY user error).
I just removed the private field and tried again here is the result:
treehouse:~/workspace$ java-repl
Welcome to JavaREPL version 303 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_65)
Type expression to evaluate, :help for more options or press tab to auto-complete.
java> :load PezDispenser.java
Loaded source file from PezDispenser.java
java> PezDispenser pd = new PezDispenser("Yoda");
java.util.NoSuchElementException
Where is this code supposed to reference:
PezDispenser pd = new PezDispenser();
In the video at mark 3:30 you input:
PezDispenser pd = new PezDispenser("Yoda");
I appreciate the response, but it didn't solve the issue as explained.
Craig Dennis
Treehouse TeacherYes, to compile your code you can do this:
javac PezDispenser.java
Now when I did this I got
treehouse:~/workspace$ javac PezDispenser.java
PezDispenser.java:16: error: '(' expected
public void load {
^
1 error
Do you see what is missing from that error message?
The REPL indeed does a bad job of reporting syntax errors. If you get strange errors from the REPL, remember to check the output from the compiler usingjavac.
typetypetypetype
Courses Plus Student 1,033 PointsHi Craig,
In the video you don't have to compile, it might be a good note to explain the repl issues, if you look at the comments a lot of people had the similar error I did with no solution. Thank you for clarifying that, it wasn't a case of "google the error code" and get an easy answer. "Thrown by the nextElement method of an Enumeration to indicate that there are no more elements in the enumeration." was the information provided by Oracle, which is certainly not something we've covered in the course so far.
The advice to test in compile is further confusing, since when I compiled my edited code I got:
Error: Main method not found in class PezDispenser, please define the main method
public static void main(String[] args)
or a JavaFX application class must extend javafx.application.Application
Out of curiosity I loaded java-repl since I compiled and saved my code and I am able to run it inside repl, as of typing this you've help me get past the 3:00 mark to the 3:20 mark successfully:
Thrown by the nextElement method of an Enumeration to indicate that there are no more elements in the enumeration.
treehouse:~/workspace$ java-repl
Welcome to JavaREPL version 303 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_65)
Type expression to evaluate, :help for more options or press tab to auto-complete.
java> :load PezDispenser.java
Loaded source file from PezDispenser.java
java> PezDispenser pd = new PezDispenser("Yoda");
PezDispenser pd = PezDispenser@366357fd
java> pd.isEmpty();
java.lang.Boolean res1 = true
I genuinely appreciate your help here, but I'm still confused how I was supposed to solve this without help.
Are you able to provide us with the code for the workspaces so we can analyze and compare our work? It's hard to compare the code in a video to the code in the workspace, and as demonstrated, some errors are just not solvable with my experience. I'm very good with google too, I'm just a sucky/new programmer.
Thanks again Craig, not trying to be argumentative just trying to understand why I can get so layed up. Trying to do 3 lessons and day and if I have to wait 48 hours for the chance of an answer (what the support staff told me today) I feel like that's enough time to lose interest or forget where I left off. Thanks for helping empower me as a learner! (and (joking), I'm pretty polite, not calling anyone a dork so we don't have to filter for that! :)
typetypetypetype
Courses Plus Student 1,033 Pointstypetypetypetype
Courses Plus Student 1,033 PointsFurthermore, how should I troubleshoot this on my own outside of Treehouse, when there's no ^ symbol to indicate the error. I'm sure later on I'll have enough exposure to do it on my own but right now this is what Oracle says:
Thrown by the nextElement method of an Enumeration to indicate that there are no more elements in the enumeration.I have no clue what that means yet.