I am trying to create a JavaFX program, and every time I try to run my code I am getting an exception – I’m not entirely sure what it means though… My code: Stack trace: Any help will be appreciated, Thanks
You’ve added an extra level of abstraction by calling the method with reflection. The reflection layer wraps any exception in an InvocationTargetException, which lets you tell the difference between an exception actually caused by a failure in the reflection call (maybe your argument list wasn’t valid, for example) and a failure within the method called. Just unwrap the … Read more
On Python ≥ 3.5, use pathlib.Path.mkdir: For older versions of Python, I see two answers with good qualities, each with a small flaw, so I will give my take on it: Try os.path.exists, and consider os.makedirs for the creation. As noted in comments and elsewhere, there’s a race condition – if the directory is created between the os.path.exists and the os.makedirs calls, the os.makedirs will … Read more
For Python 2.6 and later and Python 3.x: For Python 2.5 and earlier, use:
Your first port of call should be the documentation which explains it reasonably clearly: Thrown to indicate that an array has been accessed with an illegal index. The index is either negative or greater than or equal to the size of the array. So for example: As for how to avoid it… um, don’t do … Read more
Stack Smashing here is actually caused due to a protection mechanism used by gcc to detect buffer overflow errors. For example in the following snippet: The compiler, (in this case gcc) adds protection variables (called canaries) which have known values. An input string of size greater than 10 causes corruption of this variable resulting in … Read more
Stack Smashing here is actually caused due to a protection mechanism used by gcc to detect buffer overflow errors. For example in the following snippet: The compiler, (in this case gcc) adds protection variables (called canaries) which have known values. An input string of size greater than 10 causes corruption of this variable resulting in … Read more
You’re probably dividing by zero or some other nonsensical number. Are you sure real and imag for IFFTOutput[i] isn’t zero? Print it out just before perhaps?
j is an empty list, but you’re attempting to write to element [0] in the first iteration, which doesn’t exist yet. Try the following instead, to add a new element to the end of the list: Of course, you’d never do this in practice if all you wanted to do was to copy an existing list. You’d just … Read more
After you compile your code, you end up with .class files for each class in your program. These binary files are the bytecode that Java interprets to execute your program. The NoClassDefFoundError indicates that the classloader (in this case java.net.URLClassLoader), which is responsible for dynamically loading classes, cannot find the .class file for the class that you’re trying to use. Your code … Read more