main

问题 How do I access a variable that was declared/init in my main.go in a different .go package/file? Keeps telling me that the variable is undefined (I know that global variables are bad but this is just to be used as a timestamp) in main.go var StartTime = time.Now() func main(){...} trying to access StartTime in a different .go file but keep getting StartTime undefined 回答1: I would "inject" the starttime variable instead, otherwise you have a circular dependency between the packages. main.go

问题 I have a thread that, when the current application closes, must start the main() method of another class. I included ClassName.main(someStringArray) in the run() of the thread but the method wasn't called. What might have gone wrong? The Thread I defined : private class VideoCreator extends Thread{ public VideoCreator(){ pathToPass = savePath + "/" + "video.mov"; passVect.add("-w"); passVect.add("1280"); passVect.add("-h"); passVect.add("800"); passVect.add("-f"); passVect.add("25"); passVect

问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: Can you print anything in C++, before entering into the main function? Is there any possibility to run any other instructions before int main() is invoked? int main(){cout<<"a";} and before that call in main() there is call for cout<<"b"; somewhere before. Maybe this #define thing can help. 回答1: You don't need a define . Just create a global object (in the same file) and its ctor (or anything else you use to

问题 What is the difference between these 4 method signatures, and why does the 4th not work? public void main(String args[]) {... } public void main(String[] args) {... } public void main(String... args) {... } public void main(String[] args[]) {... } 回答1: The first three are equivalent. * The last one is equivalent to String[][] args (i.e. an array of arrays), which doesn't match what Java requires for main . However, the idiomatic version is the second one. * The third one is only valid from

问题 What is the difference between these 4 method signatures, and why does the 4th not work? public void main(String args[]) {... } public void main(String[] args) {... } public void main(String... args) {... } public void main(String[] args[]) {... } 回答1: The first three are equivalent. * The last one is equivalent to String[][] args (i.e. an array of arrays), which doesn't match what Java requires for main . However, the idiomatic version is the second one. * The third one is only valid from

问题 What is the difference between these 4 method signatures, and why does the 4th not work? public void main(String args[]) {... } public void main(String[] args) {... } public void main(String... args) {... } public void main(String[] args[]) {... } 回答1: The first three are equivalent. * The last one is equivalent to String[][] args (i.e. an array of arrays), which doesn't match what Java requires for main . However, the idiomatic version is the second one. * The third one is only valid from

问题 I'm not asking what is (String args[]) because that was answered here: What is "String args[]"? parameter in main method Java. My question is why is it necessary to write it while writing main()? I had my practical exams, where I faced a problem and realized I hadn't written String args[] while writing public static void main() . But then after writing main(String args[]) the problem was solved. (How and Why I still don't know!) On that same day I was asked in Viva I was asked - "Is it

问题 I'm not asking what is (String args[]) because that was answered here: What is "String args[]"? parameter in main method Java. My question is why is it necessary to write it while writing main()? I had my practical exams, where I faced a problem and realized I hadn't written String args[] while writing public static void main() . But then after writing main(String args[]) the problem was solved. (How and Why I still don't know!) On that same day I was asked in Viva I was asked - "Is it

问题 I downloaded and installed UMD's FindBugs 3.0 in /usr/local/share/findbugs-3.0 : $ ls /usr/local/share/findbugs-3.0/ FindBugs.jar I have a little script to run it: $ cat ./findbugs FINDBUGS_HOME=/usr/local/share/findbugs-3.0 java -jar $FINDBUGS_HOME/FindBugs.jar $* Running the script results in: $ ./findbugs Error: Could not find or load main class edu.umd.cs.findbugs.bluej.FindBugsExtension Dumping the JAR : $ jar tf /usr/local/share/findbugs-3.0/FindBugs.jar | grep "edu/umd/cs/findbugs

问题 I am writing an iOS app for the iPhone in Xcode and I have created some classes as well as their methods inside their respective .h and .m files (that's two classes so basically I have two pairs of .h & .m files) I now I want to start writing my main loop that will be executed whenever the user hits on the play button, but where exactly do I do that ? Do I do that in ViewController.m ? e.g. inside this method : - (IBAction)playPressed:(UIButton *)sender { // main loop executed in here ? // or