r version pointing to anaconda java rather than jdk on mac

Non-standard options are general purpose options that are specific to the Java HotSpot Virtual Machine, so they are not guaranteed to be supported by all JVM implementations, and are subject to change.

They are used for common actions, such as checking the version of the JRE, setting the class path, enabling verbose output, and so on.

Standard options are guaranteed to be supported by all implementations of the Java Virtual Machine (JVM). The java command supports a wide range of options that can be divided into the following categories: The JRE searches for the startup class (and other classes used by the application) in three sets of locations: the bootstrap class path, the installed extensions, and the user's class path.Īrguments after the class file name or the JAR file name are passed to the main() method. The startup class must be indicated by the Main-Class manifest header in its source code. If the -jar option is specified, its argument is the name of the JAR file containing class and resource files for the application. In the latter case, the launcher constructs an instance of the Application class, calls its init() method, and then calls the start() method.īy default, the first argument that is not an option of the java command is the fully qualified name of the class to be called. The java command can be used to launch a JavaFX application by loading a class that either has a main() method or that extends. The method declaration has the following form: The method must be declared public and static, it must not return any value, and it must accept a String array as a parameter. It does this by starting the Java Runtime Environment (JRE), loading the specified class, and calling that class's main() method. The java command starts a Java application.

R version pointing to anaconda java rather than jdk on mac