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This question already has answers here : Starting JavaFX from Main method of class which doesn't extend Application (3 answers) Closed 4 years ago . Question Can I call ' Application.launch(args); ' from a method other than main? If so could you provide an example keeping in mind the below context? Background I'm build a learning/teaching, command/text application, that teaches the user about arrays. At the end of the main class, after the major application content has ran, I call ' ViewSiteOrExit.viewSitePromptPuSVM(); ', which gives the user the opposition to either: open the Oracle page on

I am looking for a way so that we can pass both named and unnamed arguments to the main method. Currently I am passing them as follows java -jar myJar param1 param2 param3 and handling them as public static void main( String[] args ) throws IOException { String param1 = args[0]; String param2=args[1]; ..... I must be able to send them and handle them as below in Java so that I can read the values based on their names and need not pass the arguments in the same order everytime I execute the Main method. I am fine to work with some external libraries which would make my work easier. I am want to

We can write a java program with one non-public class containing a main method -- it'll compile and run just fine. Why do people make the main class public? Is there any benefit? There is no benefit of making the class public for the sake of it having a main method. That being said, there isn't really much of a reason not to either. Chances are the main class is either going to be very short with few, if any, substantial methods in it, or it's going to be baked into one of the core classes like class Server { public static void main(String[] args) { Server s = new Server(); s.start(); } //

I tried several variations on main() return; or main() if(); and obtained different errors, the most peculiar of which was /usr/lib/gcc/i686-linux-gnu/4.4.5/../../../../lib/crt1.o: In function `_start': (.text+0x18): undefined reference to `main' collect2: ld returned 1 exit status While it's uncommon for a program to require only one statement, why does main() make it a requirement to have braces? Could someone explain why the error was so peculiar when compiling just int main();? Because you are defining a function named main() and a function definition is basically a function declaration

I would like to execute an executable file whose main() returns 2 using system() . This is what I did #include <stdio.h> #include <string.h> int main(int argc, char *agrv[]) { char command[7]; strcpy(command, "./test1"); printf("The return value: %d\n", system(command)); return 0; } and test1 is #include <stdio.h> int main(void) { printf("test1 has been executed and its return value is 2\n"); return 2; } This is what I'm getting test1 has been executed and its return value is 2 The return value: 512 My question is why I'm getting 512 . The return value of system is actually the return value of

There are a lot of similar questions, but none for this specifically. I have a Netbeans project with a bunch of packages. Only one has Main. I'd like to be able to create a .jar from just one of the packages (and all the classes it contains, of course), which doesn't have main. Is this feasible without having to put that package in another project or without having to screw around with build.xml? If the latter, any easy way or good rtfm links? The point is i'm developing part of an application for college, each group member is developing a module of sorts. If each could provide their .jar the

Using the code below I am getting strange output: import sys from multiprocessing import Process import time from time import strftime now =time.time() print time.strftime("%Y%m%d %H:%M:%S", time.localtime(now)) fr= [1,2,3] for row in fr: print 3 print 1 def worker(): print 'worker line' time.sleep(1) sys.exit(1) def main(): print 'start worker' Process(target=worker, args=()).start() print 'main line' if __name__ == "__main__": start_time = time.time() main() end_time = time.time() duration = end_time - start_time print "Duration: %s" % duration The output is: 20120324 20:35:53 3 3 3 1 start