Is main a valid Java identifier?
One of my kids is taking Java in high school and had this on one of his tests: Which of the following is … Read more
main
What is “String args[]”? parameter in main method Java
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[] … Read more
Why is the Java main method static?
The method signature of a Java mainmethod is: public static void main(String[] args) { … } Is there a reason why this method … Read more
What should main() return in C and C++?
What is the correct (most efficient) way to define the main() function in C and C++ — int main() or void main() — … Read more
Can’t execute jar- file: “no main manifest attribute”
I have installed an application, when I try to run it (it’s an executable jar) nothing happens. When I run it from the … Read more
What does “Could not find or load main class” mean?
A common problem that new Java developers experience is that their programs fail to run with the error message: Could not find or … Read more
Can’t execute jar- file: “no main manifest attribute”
I have installed an application, when I try to run it (it’s an executable jar) nothing happens. When I run it from the … Read more
What is “String args[]”? parameter in main method Java
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 … Read more
What does if __name__ == “__main__”: do?
What does this do? 40 Short It’s boilerplate code that protects users from accidentally invoking the script when they didn’t intend … Read more
Exception in thread “main” java.lang.ArithmeticException: / by zero
I have two questions about Exceptions. Firstly, I got this message from my code… Exception in thread “main” java.lang.ArithmeticException: / by zero This … Read more