-
Replied To a Post in JavaFX ListView SelectedIndexChanged AIOOB
Simply test for a -1 selected index before trying to use it! -
Replied To a Post in Differences between the following declarations
(Edit) deleted text of post that was based on an incorrect reading of sepp2k's post. My mistake. He is right. -
Replied To a Post in C++ vs Java for system programming
For OS internals, drivers etc C++ definitely. Java is for applications - it deliberately isolates you from all the low-level OS stuff. -
Replied To a Post in Basic webservice
Helpful info, but maybe a bit late? (Question was asked 2 years ago!) -
Replied To a Post in Yes no checker
Your methods need to return a boolean (true or false) not a String if you want to call and use them like you do in lines 14 and 16. The … -
Replied To a Post in File Folder Traversing and Size Calc
It really pains me to see people struggling with Pre-7 Java code when Java 7 includes far better alternatives. This is one of those cases, where the NIO classes in … -
Replied To a Post in File Folder Traversing and Size Calc
Yes aFile could be either, but if on the first pass of the loop aFile is not a directory then the call to recursiveTravesrsal (line 6 above) is made using … -
Replied To a Post in File Folder Traversing and Size Calc
for (File afile : files) { if (afile.isDirectory()) { this.childFolder = new Folder(afile); parentFolder.add(childFolder); } recursiveTraversal(afile, this.childFolder); } If the first n Files are files (not directories) the variable childFolder … -
Replied To a Post in How do I sort an array but maintain the original index?
I don't know of any simple solution. You may have to create a tiny class with the data value and its original index as its two instance variables. Then you … -
Replied To a Post in Exception in thread "main" java.util.NoSuchElementException: No line found
Scanners are the source of a lot of DaniWeb threads - they were intended to be simple, but too often don't work like you expect. I suggest that since you … -
Replied To a Post in Exception in thread "main" java.util.NoSuchElementException: No line found
"an annoying error something with Scanner method" It would be a lot more helpful if you gave us the exact complete error message, including the all-important line number(s) (edit: this … -
Replied To a Post in Create txt file with a user input as its name, inside specific locations.
OK! Thanks for sharing the solution with us. Please mark this "solved" for our knowledge base. J -
Replied To a Post in Create txt file with a user input as its name, inside specific locations.
"It doesn't work" tells us nothing. Did you get an exception? Was the file created but with the wrong location and/or name? Etc? The exception on line 22 (catch) contains … -
Replied To a Post in Some enum wrangling
Questions: Why have a whole HashMap implemetation just to find enum values from their "f" String. Since enums usually have a small number of values you could simply search `Foo.values()` … -
Replied To a Post in how to call enum string in field, resort array
For the benefit of anyone looking for enum-related help here... ParPau's last code may meet the requirements of his exercise, but it doesn't use enums. To get an enum value … -
Replied To a Post in Homework: Pyramid
WARNING: To anyone copying code for a homework assignments: Your teacher can probably spot solutions copied from the web. If so you will get 0 marks, and may be penalised … -
Replied To a Post in Expression Tree parenthesis
The problem starts at line 33 (the first line in your code that appears in the stack trace). Looking there. and just before it, you call findMatchingRightParen on line 31. … -
Replied To a Post in developement of browser or media player in JAVA
JavaFX is part of the latest Java API library. Ity's for GUIs and multi-media support. It is intended to replace Swing for new GUI applications. It has good built-in support … -
Replied To a Post in developement of browser or media player in JAVA
Browser is easy, especially in JavaFX, maybe too easy because it doesn't leave a lot of places for you to show your skills. Media player may be better (also in … -
Replied To a Post in Expression Tree parenthesis
The exception message tells you which line it happened on. Post that info. -
Replied To a Post in i need help in code
mustafaaaltup: Your question is too vague. Please be more specific. How far have you got with this? What, exactly, is stopping you now? -
Replied To a Post in How JVM manage the memory and processing?
No, but from the way it was asked I thought a simple explanation of what a JVM is would ne a good place to start :) -
Replied To a Post in Java Multiplication quiz
All that code for the random numbers (lines 16-21) looks seriously over the top and thus error-prone. (It's already broken; it returns numbers 0-11. Even after you fix that it … -
Replied To a Post in How JVM manage the memory and processing?
This is a good introduction: http://www.makeuseof.com/tag/java-virtual-machine-work-makeuseof-explains/ -
Replied To a Post in how many time the method is called
YOu can use the jvisualvm profiler that comes as standard with the JDK - you'll find it in your JDK bin folder. It's really easy. -
Replied To a Post in Minecraft Modding Help
We are just volunteers here, so nobody will be in a position to give you extended one-on-one training. But if you have specific questions or errors we will be happy … -
Replied To a Post in Need Help with my code not compiling
Excellent! Please mark this "solved" for our knowledge base. You should start a new thread if you run into any new problems. cheers J -
Replied To a Post in Need Help with my code not compiling
The only way to compare equality between objects of a class is to use the class's `equals` method - the very one that you are writing now! But if you … -
Replied To a Post in Need Help with my code not compiling
I just meant that the English specification "t1 in degrees Celcius" is easily implemented in your program by `t1.getCels()` -
Replied To a Post in Need Help with my code not compiling
So your definition of "equal" is sonething like: Temperatures t1 and t2 are "equal" if and only if t1 in degrees Celcius == t2 in degrees Celcius, within the precision … -
Replied To a Post in Need Help with my code not compiling
(tempNum)==(testObj) tempNum is a double primitive testObj is an object of class Temperature they are so different in kind that using == makes no sense - its like asking "is … -
Replied To a Post in Need Help with my code not compiling
OK. got it 5(tempNum-32)/9 isn't a valid expression. You must specify the multiplication explicitly. It's just not one of the compiler's best error messages ;) (ps no point having doubles … -
Replied To a Post in Need Help with my code not compiling
That looks OK - maybe the parens are already out of step before that code? Also, I don't know what the data type for tempUnit is, but it's unusual to … -
Replied To a Post in Simulating control table of Dynamixel Pro
Looking at that table the most obvious approach is to create a simple class that represents one row, with instance variables for each column. The whole table is then just … -
Replied To a Post in playlist
See this thread http://www.daniweb.com/software-development/java/threads/475808/how-to-play-mp3-files-in-java-using-eclipse - especially the very last post -
Replied To a Post in How to resize Jbutton according to size of picture
A JButton with an ImageIcon will automatically set its own preferred size to fit the icon. The problem comes when you use a layout manager that re-sizes the buttons to … -
Replied To a Post in Java Applet Error
Please mark this "solved" if it's working now. Thanks J -
Replied To a Post in Java Applet Error
Sorry, I haven't used awt for 15 years, and I have forgotten whatever I did know. I guess you will just have to search through the API doc. But there … -
Replied To a Post in Java Applet Error
That's really sad. I would worry that if the course materials have not been updated this century then they will also miss the massive language updates of version 1.5 etc. … -
Replied To a Post in java error
^ excellent advice. You can, and should, test code as early and as often as possible. Waiting until all the code is "finished" makes it really hard to tell where … -
Replied To a Post in Java Applet Error
The awt GUI classes were superceeded in 1998 by Swing. Yes, 1998 - more that 15 years ago. You are seriously wasting your time learning or using it. Update your … -
Replied To a Post in Abstract class
"it still doesn't compile" tells us nothing. Post the complete exact error messages! -
Replied To a Post in java error
Exactly what errors? - post the *complete* text of all your error message, don't expect people to guess. [edit] Thank you. You should expect some answers now. -
Replied To a Post in LDAP: error code 52: DSID-0C090E17 Error initializing SSL/TLS, data 0, v1db
Is that a hex 52 or a decimal 52? LDAP error 52 (hex) is the totally unhelpful "Local error occurred", but if that's 52 decimal (34 hex) it's the self-explanatory … -
Replied To a Post in JLabel image won't show up
new ImageIcon(...) is famous for not throwing any exceptions when it fails to find the file; it's just null. JLabel is happy to accept null for its image icon, so … -
Gave Reputation to hannahaddad in Fibonacci program in Java
at line 21 you misspelled the fib4() (lowercase f) method. and fib4(i), i is long but it should be integer. I hope this help -
Replied To a Post in Abstract class
It's nothing to do with imports - the classes are defined in your source file. @hannahaddad told you what to do a day ago. Until you follow that advice you … -
Replied To a Post in playing backround music in a java program
Wazan: Do not hijack old forum threads by posting a new question as a reply to an old one http://www.daniweb.com/community/rules Start your own new thread if you have a question. -
Replied To a Post in Fibonacci program in Java
What exactly is the error message the *compiler* (not the runtime) gives for that line? Is line 21 the System.out.println ? It's absolutely pointless to try to execute a program … -
Replied To a Post in confuse
Have a look at http://docs.oracle.com/javase/tutorial/getStarted/application/index.html#MAIN
The End.