This means that this method can be used without creating an object.'public', in particular, means that any other class is allowed to run this method, hence the name. 'public' is an access specifier, which determines who is allowed to access and run this method.Note: You don't have to understand this yet! Public static void main ( String args ) Dissecting main() An explanation follows below don't memorize this. Over time, you will learn the concepts needed to understand meaning of each part of the main() method.You need to memorize the syntax shown below.Even large projects with many different parts and files need an entry point - and that entry point is the main() method. Every Java application needs at least one main() method.When you run a Java program, the Java Virtual Machine begins by running the code in the main() method of the class you have chosen.The entry point of every Java application is the main() method. The methods are instructions that accomplish the task, possibly by telling other classes to perform subtasks. The tasks that a class can perform are defined as methods in the class. In Java, a program consists of one or more classes, where each class can perform different tasks and can tell other classes to perform tasks as well. Two suggestions you have led me to consider are inserting this main method with launcher and edit the MANIFEST.MF.A program is a set of instructions that tells the computer what to do. ImageView.getScene().getWindow().sizeToScene() Pane.getStyleClass().add("image-wrapper") ĬurImage = (curImage + 1) % images.length ![]() ImageView = new ImageView(images) īorderPane pane = new BorderPane(imageView) Private int curImage = void start(Stage stage) throws Exception * Write a description of JavaFX class CatView here. Here are the contents of the manifest file in CatView.jarĪnd here is the CatView.java that is lacking any main method per the tutorials instruction! If the app launched from BlueJ and not as an executable XXX.jar, please tell us the contents of the manifest file in the XXX.jar, and how the class with the main() method was specified. I have run nonJar NetBeans JavaFX projects successfully inside of NetBeans but my goal here is to run a JAR file in NetBeans and outside of it. Main question is: will this BlueJ interactive tutorial run as a standalone executable JAR file anywhere outside of a BlueJ IDE. Build was successful however on running the project with CatView.jar in it, kept receiving runtime error: Set the libraries for JavaFX in the properties for the project. Started a new project and added CatView.jar to it as a Java Application. Not sure if this was done correctly so some suggestion on a correct way to create a NetBeans project with an imported and accessible JAR file would be appreciated. Also imported CatView.jar into NetBeans 12.6 IDE. "Error: Could not find or load main class CatView Caused by: : javafx/application/Application"Īccording the the tutorial a Main class is not required to run a JavaFX executable such as the one created in BlueJ interactive tutorial.Īs far as an instructional beginners tutorial this statement seems to me to be very misleading at this point. running command line interface from the directory where CatView.jar located using "java -jar CatView.jar" recevied error message In Windows 10 double clicked on CatView.jar executable file and no output Successfully created compiled and ran CatView Class as a JavaFX Application in BlueJ IDE BlueJ Quick Introduction Interactive Tutorial completed ![]() Java Home: /usr/lib/jvm/java-11-openjdk-armhf Virtual Machine: OpenJDK Server VM 11.0.13+8-post-Raspbian-1deb11u1 (Raspbian) I sent the following to BlueJ support before realizing I could get some help here. I originally learned of this forum through Raspberrypi and Bluej IDE on pi4. This is my first post and from what I can tell the only ( recent ?) one.
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