Main method empty?
If you intend Launcher to be the main class of the application, the one you use to start it, the main method is needed and must do whatever should be done to start work. If not, delete the main method. Eclipse does not require a main method unless you start...
How to quit my main method?
The point is not to quit your main method, but to exit the loop of the eating action in order to print some statistics. A good way to do this is alter your loop condition so that it terminates when not needed: while(theHerbivores.size() > 0 && thePlants.size() > 0) {...
Passing methods as parameters prior to Java 8
Since you can't use Java 8, this is what you can do. Create an interface called Method : public interface Method { public boolean call(int value1,int value2,int value3); } Create an implementation of Method called SubMethodA : public class SubMethodA implements Method { @Override public boolean call(int value1, int value2,...
java setter list object main not working
Analysator class expect the list as input, so provide a list to it: Analysator analysator1 = new Analysator(); analysator1.setListRoleGame(Arrays.asList(new RoleGame())); // Should work ...
Writing to Shared Memory in CUDA without the use of a kernel
It's not possible. The only way to populate shared memory is by using threads in CUDA kernels. If you want a set of (read-only) data to be available to a kernel at launch, it's certainly possible to use __constant__ memory. Such memory could be set up on/by the host code...
How do I pass data through multiple functions and call them correctly in main?
c++,function,scope,main,data-type-conversion
You are doing it wrong. You should read about function signature and passing arguments. You have defined weight as a function that doesn't take any arguments double weight() { //...} but you are calling it with some parameter userWeight in main function weight(userWeight); and this parameter in addition is not...
Using the .h extension
c++,include,g++,header-files,main
Your lecturer and his book are incorrect/depend on things that were sort of the case 20 years ago. Before C++ was standardized in 1998, many compilers (or rather: their library implementations) did in fact know a header <iostream.h> in which several symbols that are in the namespace std in standard...
Creating just an object in main from using the constructor and method that is provided
First of all you class name should begin with an UpperCase letter Calculator and you can do the following: Implement the constructor of your class like you did. Write a method that takes all the code you have on your main and make some changes like in the code below:...
Which statement in my main method is calling all my other methods in my other classes and my main class?
java,multithreading,user-interface,jframe,main
The purpose of the main() method is to give an entry point for stand alone execution. In your case (you did not show how game is initialized but I guess it was a static Game game = new Game(); initialized field) what happens is that first the static fields are...
C++ declare 'main' as a reference to function?
c++,reference,main,language-lawyer,iso
That's not a conformant C++ program. C++ requires that (section 3.6.1) A program shall contain a global function called main Your program contains a global not-a-function called main, which introduces a name conflict with the main function that is required. One justification for this would be it allows the hosted...
Fatal Error While Starting Application (E/AndroidRuntime(4881): FATAL EXCEPTION: main)
java,android,eclipse,main,fatal-error
Finally i have done, i am just Fix dependencies in Jar mismatch! this is my solution Jar mismatch! Fix your dependencies
Python 2.7, TypeError: 'module' object is not callable (referring to command-line argument)
python,python-2.7,command-line-arguments,main,argparse
path is a module within os module. You need to call it's member functions. I don't know which one exactly do you need, but there is a os.path module documetnation here: https://docs.python.org/2/library/os.path.html
Website from login page i want to direct to the main page?
First move your PHP code to the start of the file, secondly, use header("location: /main.php"); exit(); to redirect after a successful login <?php $error = ''; require('connect.php'); $username = @$_POST['username']; $password = @$_POST['password']; if(isset($_POST['submit'])) { if($username && $password) { $check = mysql_query("SELECT * FROM users WHERE username='".$username."' AND password= '".$password."'");...
C++ - Looping main resetting objects
It is probably not a good idea to use recursion to do this task. If you want it to repeat you are probably better off with a while loop. http://msdn.microsoft.com/en-us/library/2aeyhxcd.aspx While(true) will loop as long as the statement (true) is true. Aka forever. You could also do something like while(choice...
Thread run() method execution different on Run and Debug in eclipse
java,eclipse,multithreading,main
The order in which the string "Started" and the integers are printed out is undefined by definition. After you call start, there is no guarantee that the code in the run method will be executed before or after any other statement that appears before the call to join. This is...
what does static here refer to in java
java,methods,static,main,refer
static { System.out.print("x "); } This is the static initializer block. This will be called at the time of class loading. Thus first call. { System.out.print("y "); } This is non static initializer block. Will be called the first thing once a object is created. testclass() { System.out.print("c "); }...
Flush out all other characters in input buffer
There is no such thing as "flushing" an std::istream. Flushing is an output concept. Since there are multiple buffers for input from the console (the input buffer inside the std::istream's std::streambuf and an operating system consolde buffer) there is no reliable way to actually get rid of all input characters....
Does the main method in Java have to be static?
Not all your methods must be static, only the main entry point for your application. All the other methods can remain non-static but you will need to use a reference of the class to use them. Here's how your code would look like: public class Sheet { public static void...
Java- code in main method or not? If not, how do I call new method from main?
There is one main methode in one of your classes which is the starting point of the program. It is a good practise to seperate gui, data and logic. So in your case I would do the following design. class Main - contains your main methode which starts either GUI...
Int main inside a class
By defining a normal main that only contains a call to your other function. Like this: int main(int, char**) { return Main().main(); } ...
how to add form in main function (Visual Basic)
You are close with your attempt, but a few key parts are missing/out of order. I modified your code and added some comments to help get you started. Module Module1 Sub Main() ' Create a new form object, but don't display it yet. Dim f As New Form ' Create...
Should I test for nullity of values in the args array of Main
As written in your question, the static void Main() is private (because private is implicit if missing). Whoever calls it must use reflection and must know he is walking on tiny ice. He has the duty/obligation of passing correct parameters (where "correct" in this case is "no null values" anywhere)....
The position of int main() function [closed]
c++,function,styles,main,writing
When the program is in C and not C++, I always put my main function at start, so if anyone or yourself want to see the program logic, then can be seen without the need to go to the file end, and if anyone have a doubt about any function,...
why javafxpackager -could not load main class?
Your application class is in package helloworld, so to reference it you should use the fully qualified name of helloworld.HelloWorld. Here is a complete example using the example HelloWorld application from your question. I tried this on OS X 10.8 with Oracle Java 8u25 installed and it worked for me....
Launch multiple java applications from one java application
java,eclipse,multithreading,main,launcher
I'm not sure why you don't want to run clients using threads, Runtime.getRuntime().exec() can invoke extarnal jars within a class Process run= Runtime.getRuntime().exec("java -jar jarpath_here"); If you put this in loop you'd have multiple processes....
C - Use “*” as argument of function main()
The * is a special wildcard used in shell context. The shell will always expand the * before it is actually passed to your program. To take the input of * as a command line argument character, you can enclose the * in quotes, like "*"or use an escape character...
Exception in thread main error in array program
java,exception,exception-handling,main
int arrayfirst[] [] ={{1,2,3},{2,3,4}}; int arraysecound[] [] ={{3,4,5},{6,7,8}}; here, arrayfirst and arraysecound contain two rows and three columns each (The number of inner curly braces separated by Comma signify number of rows, and the numbers written within these inner curly braces signify number of columns), so when you add their...
Do-While to ask user to repeat entire int main programme
c++,user-interface,main,repeat,do-while
Here's an example of a simple solution: int main() { for (;;) // "infinite" loop (while (true) is also possible) { // stuff to be repeated here cout << "Repeat? [y/n]" << endl; char answer; cin >> answer; if (answer == 'n') break; // exit loop } // else repeat...
Gradle built jar does not find my main class
The source file is in the wrong location. By default, it needs to go into src/main/scala/org/playground/readCsv.scala. Otherwise, it won't even get compiled.
How would I write a header and implementation file for FizzBuzz in Objective-C?
objective-c,header-files,main,fizzbuzz
Thx to @FreeNickname and @Wongzigii for pointing out some simple mistakes in my code, I was able to determine that in order to call the method in main, I simply had to write the following code: int main(int argc, const char * argv[]) { @autoreleasepool { FizzBuzz *test = [FizzBuzz...
Haskell use instanced Read in main with Type
You can use type qualifier in let. Your main would look like this: main :: IO () main = do putStrLn "Insert a Term:" inpStr <- getLine let outStr = read inpStr :: Term putStrLn $ show outStr ...
"Error: Could not find or load main class” in jenkins
Java doesn't support "run this file as a class" directly. Instead, you need to add the class to the classpath and then call it using the Java Fully Qualified name: java -classpath $JENKINS_HOME/jobs/$JOB_NAME/builds/$BUILD_NUMBER com.foo.Class ... would run the Java code in .../builds/$BUILD_NUMBER/com/foo/Class.class Note: Avoid call() with a string. Instead build...
How to use variables from 'main' method in another class? Serialization
When you are loading, you create a new Player, set it and then discard it. Perhaps you intended to set the fields of the current Player. Also you don't need the temporary variables. You can just set the fields. public static void main(String... ignored) throws IOException { Player player =...
How to redirect the user to their proper pages after login?
put die(); after header("location:../../statistics/home.php"); and check session in home.php
Passing arguments to main in C using Eclipse
1) Sure, that's all fine (except for the argv indices as described below), if you're assuming your inputs are valid numbers. If not, atoi will return 0. 2) You're not meant to pass arguments to main -- instead, you pass arguments to the program, and the OS comes up with...
C# Raise events on another thread
I have ran into a similar problem not too long ago. I have dealt with it in C++/CLI so the same approach should also work in C# too. I believe you have the Engine class initialized in your MainForm. If you want to raise events from another thread then this...
eclipse equinox: how to set return value?
The normal way of doing this is the return value of the IApplication start method: @Override public Object start(IApplicationContext context) { ... run the application return Integer.valueOf(0); } Although the return value can be any Object it is usual to return an Integer. The IApplication object already defines a few...
Fatal Exception Main Android Null Pointer Exception
android,exception,nullpointerexception,main
The error is in this function public String getTimeZone() { return mTimeZone; } The mTimeZone variable in returning null, and so, the following code raiser an exception: TimeZone.getTimeZone(getTimeZone()) Also, in this function: private CurrentWeather getCurrentDetails(String jsonData) throws JSONException { JSONObject forecast = new JSONObject(jsonData); String timezone = forecast.getString("timezone"); Log.i(TAG, "From...
How is `int main(int argc, char* argv<::>)` a valid signature of main? [duplicate]
char* argv<::> is equivalent to char* argv[]. <: and :> used here are digraphs. C11: 6.4.6 (p3): In all aspects of the language, the six tokens79) <: :> <% %> %: %:%: behave, respectively, the same as the six tokens [ ] { } # ## except for their spelling....
Designing implementation code: static or dynamic?
making everything in my implementation Class private static This is contradicting the OOP way, if your project needs only funcions and procedures and does not rely on objects and messages, it is a clear indication that something in your design is very wrong when it comes to Object Oriented...
How can I pass arguments to main other than String args[] from the console?
The main() method is the entry point to start a Java program. If you relay on input parameters you need to represent them as strings. Use those to instantiate java objects and pass those to the methods which require them. The strings passed to main() may represent a path to...
Getting back the correct values when using classes in Python
In your usage of the class: sentlist = scan(string) print sentlist; Your are creating an instance of the class and printing it. Instead I believe you want to call the scanner member function: mySring = "somestring"; // declares a string s = scan(myString); // creates instance of class, passing string...
Create Jar Library Without a Main Class
Create Artifact like in this article, but without specifying Main class http://blog.jetbrains.com/idea/2010/08/quickly-create-jar-artifact/ Then click Build > Build artifact > Build. This works even if there is no Main class....
GTK Main blocking Others threads.How to solve
You may need to call gtk_main() just one time, and use gtk_widget_hide() and gtk_window_present(), instead of gtk_widget_destroy(), declaring window1 and window2 as global variables, and creating the two windows at startup. A sample code: GtkWidget * window1; GtkWidget * window2; void S1() { // create the window window1 = GTK_WIDGET...
C++ Object-oriented programming
As Oswald says in his answer, Pracownik * lista_wsk = new Pracownik[10]; allocates an array of 10 Pracownik objects. This is probably not what you want. With polymorphism involved, we usually want to deal with pointers or references. Hence, you'd want an array of Pracownik * pointers. Since you already...
Cabal: No 'Main-Is' field found for executable test1
You forgot to uncomment the file that tells GHC what module to build as the main entry point ... executable test1 main-is: src/Main.hs -- Or whatever is appropriate build-depends: base==4.6.* ...
C program. Call a function that prints a string
As mentioned by you if you don't like to use pointers it can be done as shown below: #include <stdio.h> int StrPrint(char s[]) { printf("%s\n", s); return 0; } int main() { char str[] = "The string i am returning n"; if (!StrPrint(str)) printf("Done!\n"); return 0; } ...
Eclipse Java Error: Cannot find or load main class
java,eclipse,class,compiler-errors,main
Your code looking fine ! Do following steps to run your class Select your project, go to Project section in menu bar then click clean. In tool section click on enter code here Build Automatically. Select your class right click on it and then select run. ...
How does the main function of the argparse template that ships with eclipse work in the interactive python shell?
Within a module, its own doc is available as __doc__. You don't need to import anything, or reference __main__ (which in the interactive shell points to shell environment, not any imported module). This works when main is called from if __name__ and from a shell: def main(argv=None): # IGNORE:C0111 #...
accessing variables from main method in python idle
If you declare variable inside a method/function they are only in scope for the life of that method or function. You can't access them from outside. If you want some variable to be available to you declare it in the global space and then import like you would any other...
Netbeans/java: Could not find or load main class library
And the solution lays in a VM Options. I already added the VM Option -Djava library path="/usr/lib/jni/" to make librxtx-java work (according to this post). Removing this VM Options fixed my problem. I haven't tested if I still can connect to my serial device (the reason why I'm using librxtx-java)...
I need to get my main function working
You can use the argument n to determine the number of numbers to generate in your list def create_list(n): import random my_list = [] for i in range(n): my_list.append(random.randint(1,6)) return my_list To count the items in your list, a straight forward way to do it would be like so def...
Looping a Thread
you have created a thread, this is the start for you but it will run once. if you want him to run in a loop you need to put loop. the loop need to be in the run() method, from the start to it's end, or as much as you...
Why are command line arguments passed as a String array in Java?
java,command-line-arguments,main
C programmers were familiar with this format. Green team decided to pass parameters this way. Separating the command line to elements is platform dependant and (I think) done by the shell. So, passing command line as a array of Strings allows creating portable, cross-platform code. ...
java.lang.ClassNotFoundException: com.example.Main in intelliJ and Maven build
I'm not sure exactly what you are trying to do, but I usually just right click on the main method and then click on the Run option. If you haven't downloaded all your dependencies, then go ahead and click on the Maven Projects tab, on the right side of the...
how to send parameters to main function in objective c
In Xcode, edit the scheme for your target. Then click on the "Arguments" tab. This will reveal the arguments editor where you can set the arguments that are sent to your target when running from Xcode. However, if you are building a command-line utility and already have it built and...
Is it more efficient to have a print statement in a method besides main or does it matter?
There is no difference in efficiency. This can be seen by the fact that a function can't find out what other function called it. It can't possibly behave in a different way. (Except for stack introspection and inlining...) Architecturally it is better to try to keep methods pure in the...
How to call a method defined in main.cpp from another .cpp source file?
"Is it private / public / something else?" Such is called a global variable, and it's publicly visible. Anyone can access it just providing a extern int var; statement. "can I create a getter/setter for this variable?" Yes, you can do (see later explanations) "I can't even include the...
error: cannot find symbol variable main
The tutorial you are referring to has missed to include the menu file 'main' under the menu folder.. Include main.xml in your menu folder (if it doesn't exist, create one under resources directory).
Problems returning a value while using a trait and companion object in Scala (Eclipse IDE)
scala,main,value,trait,companion-object
I am not sure why you mention that placing the val x outside the List object prevents you from compiling. The following compiles and produces the expected output = 3 object Work extends App { // These 3 lines define a simplified List type sealed trait List[+A] case object Nil...
Java - could not find or load main class error
I'm not sure if this is what was going on, because I had deleted the last project and started over. But I just got a similar error and thought I'd post this in case it helps someone. In the process of doing a similar project, I forgot to include "String...
How can I use a string from another function? [closed]
c++,function,methods,scope,main
Return a string instead of void. string name() { cout << "Welcome ________ ... uhmmmm, what was your name again? "; string name1; cin >> name1; cout << " " << endl; cout << " Oh that's right! Your name was " << name1 << ", how could I forget...
Thread Context of main() after Kernel start
For RTOSs, it's typical that the function that starts the Kernel or Scheduler does not return to main unless an error occurs. For FreeRTOS, vTaskStartScheduler() does not return unless there is insufficient RAM. For uC/OS-III, OSStart() does not return. These are just two examples. Starting the Kernel/Scheduler puts the Scheduler...
Difference between void main and int main [duplicate]
int main means you will end your program with return 0; (or other value, 0 is the standard for "everything's fine"). void main will allow you to skip that line, and have some other effect. Although it doesn't do a lot of bad, it's better in my opinion to use...
Program runs in eclipse, but not in .jar form
For java -jar x.jar to work, the jar file must contain a META-INF/MANIFEST.MF file, and this file must contain an entry for the main class. You can add a manifest in Eclipse. Note that any dependencies must also be accounted for, either by: a class path in the manifest -cp...
could not find or load main class when running from within eclipse
From your comments it seems that your command should probably look like java -cp c:\users test so try changing your code to something like Process p1 = Runtime.getRuntime().exec("java -cp c:\\users " + exec); where exec should pass full.package.name.of.YourClass which in your case is most probably test (not test.class or test.java)....
main() on the first place C
The compiler has to know just a few things about the functions that you use in your code before the are called. The actual implementation/definition of the function is not needed, only a declaration (a function prototype) is needed before calling. This can be done in two ways: In a...
How to handle empty parameters in a main method java call
Suppose for example that last two are optional. String dType = args[0]; String clientName = args[1]; String cycleString = args[2]; String mspsURL = args[3]; String inputFile = (args.length < 4 ? "default inputFile" : args[4]); String outputFolder = (args.length < 5 ? "default outputFolder" : args[5]); ...
Apple Watch, WatchKit Extension and main application
To communicate to the containing iPhone app you can use (BOOL)openParentApplication:(NSDictionary *)userInfo reply:(void (^)(NSDictionary *replyInfo, NSError *error))reply In your WKInterfaceController From the Apple Docs Use this method to communicate with your containing iOS app. Calling the method causes iOS to launch the app in the background (as needed) and call...
main method in java why Accept invalid String args
This is because String... will be converted into String[] According to jls §8.4.1 Invocations of a variable arity method may contain more actual argument expressions than formal parameters. All the actual argument expressions that do not correspond to the formal parameters preceding the variable arity parameter will be evaluated and...
Could not find a storyboard named 'Main' in bundle NSBundle?
xcode,localization,storyboard,main,viewcontroller
"... Cleaning..." The SpriteKit app template includes a Main.storyboard & is used as the view that the GameScene is loaded into. It's quite possible that you removed it and went on working fine until cleaning the project much later; at least it's my experience that after removing a storyboard or...
Java exercise files without main?
Many libraries are developed without the purpose of running as a standalone application. Joda-Time is one such example. It is a library you can use to simplify the manipulation of date and time data. Admittedly, the source repository I linked does have main methods in it, but that's because they...
How can we pass arguments to the main function in JAVA using command prompt and notepad?
function,cmd,arguments,main,using
The parameter for your main method should be something like String[] args, right? Its just an array of Strings. When you run your program from the commandline, the java executable looks at all the arguments passed in after the file name and appends them to the args variable. For example,...
Scope of input haskell
inp exists only within the scope of the do expression, which explains why you get an error in the first version. As for the second version. it can be rewritten to: main = e where e = do inp <- getLine putStr result result = lcm 3 inp The two...
What is the correct way to use System.exit() method in java and call a method after? [closed]
System.exit(int) takes an integer argument, but otherwise you can call it to terminate your program. Why do you want to call your main() method again? It is normally the static entry point to your program. If there's some code you wish to repeat, I'd suggest putting this in its own...
ISR vs main: what are the trade offs of running in one or the other?
Normally, ISRs come into scene when a hardware device needs to interact with the CPU. They send an interrupt signal that makes the CPU to leave whatever it was doing to service the interrupt. That it's what ISR must care about. Now, this depends on many factors, being the hardware...
Can I use GetAsyncKeyState() outside of the main() function?
Your problem has nothing to to with main() or not. You can call winapi function such as GetAsyncKeyState() from wherever you want in your code, as long as you provide the good arrguments. According to this list of virtual key codes the code 0x4c corresponds to the key L and...
eclipse can't find main class
Eclipse has a project based classpath functionality. Keep all the jars you'd like to be imported in a folder and from eclipse, right click on your project --> properties --> java build path --> libraries (tab)-->add external jars. Select all the jars you'd like to import to your project. Try...
Misunderstanding of Instances and Declarations
java,variables,object,instance,main
The line public static Board board; declares a variable that can refer to a board. In a way, think of it like a box - you created an empty box. It has nothing in it, but you now have the ability to put something in that box. Each part of...
How exactly works the Java application exit code of the main() method?
The VM exits when all of the non-daemon threads stop running, or System.exit(exitCode) is called In the first case, the exit code is 0. In the second case, it's the exit code passed to the exit() method. Don't forget that even if your main() method returns, the program will continue...
execute method in cmd without main function
If you want to call Java class from Python and get result from it, then you should use something like JPype or Pyjnius. See Calling Java from Python...
How does function named connect() prevent MPI C program from running?
c,function,runtime-error,mpi,main
I would guess that one of the MPI functions you call is in turn calling the connect() system call. But since ELF executables have a flat namespace for symbols, your connect() is being called instead. The problem doesn't happen on Mac OS because Mach-O libraries have a two-level namespace, so...
C++ references to main parameters
First of, consider char* to mean c_string, and it immediately becomes obvious why you would need int main(int argc, c_string argv[]) versus int main(int argc, c_string& argv). After all, programs can take more than one parameter. Since an array of references (if it were allowed) would turn out to hold...
Can't get it to show “Invalid Score. Please Re-enter” for scores above 100
c,arrays,if-statement,for-loop,main
Use || instead of && in your if statement. if ((scores[i]<0) || (scores[i]>100)) ...
Only works in Main Activity?
you add the android:onClick attribute in the layout ? this is bad practice better implementing View.OnClickListener public class MainActivity extends Activity { private String[] myString; private static final Random rgenerator = new Random(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Resources res = getResources(); myString = res.getStringArray(R.array.myArray); String q...
Change variables from Main method using oither classes in Java? [closed]
Java Code public class TestProgram { public static void main(String[] args) throws FileNotFoundException { { int userThrow, cpuThrow; final int ROCK = 1, PAPER = 2, SCISSORS = 3; String rockName = "Rock", paperName = "Paper", scissorsName = "Scissors"; String nameOfGame = "Rock, Paper, Scissors"; String userThrowEng, cpuThrowEng; int outcome;...
Creating an array of inherited objects
java,arrays,class,main,extends
You never initialized the array that you used to insert. When you do Tab[i], you are dereferencing a null pointer. Have something like public class Biblio { Biblio[] Tab; static int i=0; public Biblio() { Tab = new Biblio[5]; } void insert(Biblio O){ Tab[i]=O;i++; } } ...
php get domain from url and ignore subdomains
$url = 'http://vk.me/u170785079/video/l_051000aa.jpg'; $info = parse_url($url); $host = $info['host']; $host_names = explode(".", $host); $bottom_host_name = $host_names[count($host_names)-2] . "." . $host_names[count($host_names)-1]; echo $bottom_host_name; ...
Some informations of how handle the main() args in Java [duplicate]
In Intellij (Linux) you do: Press Alt + Shift + F10 (the run shortcut) Press right key Go down to Edit Then press Tab to go to "Program arguments". This is where you pass the arugments in IntelliJ. After that just hit run. ...