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Java Forum / First Aid / October 2004Cannot execute method in another class!
I'm working in NetBeans and have 2 classes: Class A that has a main method and calls methodB that is contained within Class B and is declared public and static but I get "cannot resolve symbol method B" error. The same code works when methodB is placed within Class A. Putting package mario.com at the start of both classes didn't help, so what might be the problem! Help appreciated! > I'm working in NetBeans and have 2 classes: > > Help appreciated! ...also significative code... Mario >> I'm working in NetBeans and have 2 classes: >> >> Help appreciated! > > ...also significative code... Here you ask for code. Doesn't it occur to you that we need to see yours first?  SignaturePaul Lutus http://www.arachnoid.com > I'm working in NetBeans and have 2 classes: > [quoted text clipped - 6 lines] > Putting package mario.com at the start of both classes didn't help, so what > might be the problem! How exactly do you try to call "methodB" in ClassB? You need an instance of your ClassB on which to call methodB. But then again, as methodB is static you call it like this: ClassB.methodB(); Peter Whatever I try turns out wrong: methodB(); doesnnot work nor ClassB.methodB(); in my humble knowledge just methodB() should do the trick as the method is static but it doesnnot. > > I'm working in NetBeans and have 2 classes: > > [quoted text clipped - 15 lines] > > Peter > Whatever I try turns out wrong: > [quoted text clipped - 6 lines] > in my humble knowledge just methodB() should do the trick as the method is > static but it doesnnot. You have been asked several time to post your code. Maybe you should take the advice. For lack of code, everyone is reduced to guessing, including you. SignaturePaul Lutus http://www.arachnoid.com > I'm working in NetBeans and have 2 classes: > [quoted text clipped - 6 lines] > Putting package mario.com at the start of both classes didn't help, so what > might be the problem! Since you didn't post any code, it's impossible to tell exactly. However, the most likely cause is that you have to use the dot (.) operator to access a member of a class, whether it be a method or a [public] variable. Like this: public class A{ public static void main(String[] args){ B.someMethod(); } } public class B{ public static void someMethod(){ //method implementation goes here } } > Help appreciated! Posting the actual code of your program would be appreciated as well, because it would be a tremendous help in tracking down just what goes wrong and where. Signature-Aki "Sus" Laukkanen >I'm working in NetBeans and have 2 classes: > [quoted text clipped - 8 lines] > >Help appreciated! could you post your code? -- now with more cowbell > I'm working in NetBeans and have 2 classes: > [quoted text clipped - 8 lines] > > Help appreciated! AHA! I see what you're doing wrong. The code is missing. You forgot to type it in and compile it. Is the imaginary method declared static so you can call it from the other class without instantiating it? Thanks for all the replies but it really didn't have anything to do with badly written code, I didn't put all the classes in the same package and therefore I couldn't call method B from within Class A nor could I instantiate an object of Class C from within Class b etc. New Package -> and then copy paste of the code saved it! Thanks! Rio coughed up: > Thanks for all the replies but it really didn't have anything to do > with badly written code, I didn't put all the classes in the same [quoted text clipped - 4 lines] > > Thanks! OI. That is not a "real" solution in the long run, unless you truly intend for the classes to be living "together" in package harmony (kumbaya)... Learn about using fully qualified class names gurgle.spit.Splat.method(); or imports import gurgle.spit.Splat; ... Splat.method(); SignatureFramsticks. 3D Artificial Life evolution. You can see the creatures that evolve and how they interact, hunt, swim, etc. (Unaffiliated with me). http://www.frams.alife.pl/ > Thanks for all the replies but it really didn't have anything to do with > badly written code, Nobody suggested that before now. Aki, Paul and Hal were all asking for an example of what you were doing. Here are some further points on examples.. <http://www.physci.org/codes/sscce.jsp> .... > New Package -> and then copy paste of the code saved it! See you next time* your IDE does something you do not understand, that does not work as you hope it to. I suggest you abandon the IDE for the moment and figure how to do these things from the command line. <http://www.xdweb.net/~dibblego/java/faq/answers.html#q34> ( * Soon. ) SignatureAndrew Thompson http://www.PhySci.org/codes/ Web & IT Help http://www.PhySci.org/ Open-source software suite http://www.1point1C.org/ Science & Technology http://www.LensEscapes.com/ Images that escape the mundane Andrew Thompson coughed up: ...[rip]... > See you next time* your IDE does something you do not > understand, that does not work as you hope it to. I > suggest you abandon the IDE for the moment and figure how > to do these things from the command line. It has always been my position that rank beginners should /always/ thoroughly learn development from the command line *first*. I'd put that in 200 point type if I could, with <BLINK> tags :) . The only technologies I'd suggest in the very beginning (but no further) would be vi, or the equivalent. emacs {shudder} maybe. Even ho hum textpad. make, but not necessary Beginners should stay *away* from /any/ IDE until they feel like they understand the command line, the compiler, the classpath, the package to filesystem mapping, etc. It's when folks are hazy on the fundamentals that they get utterly stuck in more complicated (IDE) environments, where nearly all the details are hidden. The only possible exception to this rule of mine *might* be BlueJ, which exists to teach OO fundamentals in java to beginners specifically /away/ from the grit and grime of the details----I don't know how to regard that product yet, since I've never "taught" in it. ...[rip]... Signature"His name was Robert Paulson. His name was Robert Paulson. His name was Robert Paulson..." >Thanks for all the replies but it really didn't have anything to do with >badly written code, I didn't put all the classes in the same package and >therefore I couldn't call method B from within Class A nor could I >instantiate an object of Class C from within Class b etc. > >New Package -> and then copy paste of the code saved it! No it didn't fix your problem. I suspect it was a work around. Classes don't need to be in the same package to instantiate each other or call methods from other classes... That would really be pointless, don't you think? -- now with more cowbell > Classes don't need to be in the same package to instantiate each other > or call methods from other classes... That would really be pointless, > don't you think? Indeed: how would you create a List of String's if that were true? SignatureOscar Kind http://home.hccnet.nl/okind/ Software Developer for contact information, see website PGP Key fingerprint: 91F3 6C72 F465 5E98 C246 61D9 2C32 8E24 097B B4E2 Hal Rosser coughed up: >> I'm working in NetBeans and have 2 classes: >> [quoted text clipped - 13 lines] > Is the imaginary method declared static so you can call it from the > other class without instantiating it? YES! I cut and pasted his blank space code example and got nothing working either. SignatureFramsticks. 3D Artificial Life evolution. You can see the creatures that evolve and how they interact, hunt, swim, etc. (Unaffiliated with me). http://www.frams.alife.pl/ "Thomas G. Marshall" wrote... >> "Rio" wrote... >>> Help appreciated! >> [quoted text clipped - 5 lines] > YES! I cut and pasted his blank space code example > and got nothing working either. Maybe he's programming in another language and is simply in the wrong group? http://compsoc.dur.ac.uk/whitespace/ // Bjorn A Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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