One of my kids is taking Java in high school and had this on one of his tests: Which of the following is a valid identifier in Java? a....
I’m just beginning to write programs in Java. What does the following Java code mean? public static void main(String args) What is String...
The method signature of a Java mainmethod is: public static void main(String...
What is the correct (most efficient) way to define the main() function in C and C++ — int main() or void main() — and why? And how about the...
I have installed an application, when I try to run it (it’s an executable jar) nothing happens. When I run it from the commandline with: java -jar “app.jar” I...
A common problem that new Java developers experience is that their programs fail to run with the error message: Could not find or load main class ... What does...
I have installed an application, when I try to run it (it’s an executable jar) nothing happens. When I run it from the commandline with: java -jar “app.jar” I...
In Java args contains the supplied command-line arguments as an array of String objects. In other words, if you run your program as java MyProgram one two then args will contain ["one", "two"]. If you wanted to output the contents...
What does this do? 40 Short It’s boilerplate code that protects users from accidentally invoking the script when they didn’t intend to. Here are some common problems...
I have two questions about Exceptions. Firstly, I got this message from my code… Exception in thread "main" java.lang.ArithmeticException: / by zero This error message means dividing by zero,...