The content of the JDK_JAVA_OPTIONS environment variable is a list of arguments separated by white-space characters (as determined by isspace()). JDK_JAVA_OPTIONS prepends its content to the options parsed from the command line. Using the JDK_JAVA_OPTIONS Launcher Environment Variable The javaw launcher will, however, display a dialog box with error information if a launch fails. Use javaw when you don’t want a command prompt window to appear. Windows: The javaw command is identical to java, except that with javaw there’s no associated console window. The startup class must be indicated by the Main-Class manifest header in its manifest file.Īrguments after the class file name or the JAR file name are passed to the main() method. If the -jar option is specified, then 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 isn’t 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. See Using the JDK_JAVA_OPTIONS Launcher Environment Variable. The method declaration has the following form:Ī new launcher environment variable, JDK_JAVA_OPTIONS, was introduced in JDK 9 that prepends its content to the actual command line of the java launcher. 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. Specifies the name of the initial module to resolve and, if it isn’t specified by the module, then specifies the name of the mainclass to execute. Optional: Specifies the path to a semicolon-separated ( ) list of directories in which each directory is a directory of modules Used only with the -module-path option. Jprofiler run in separate thread archive#Specifies the name of the Java Archive (JAR) file to be called. Command-line entries following classname are the arguments for the main method. Specifies the name of the class to be launched. See Overview of Java Options for a description of available options. Optional: Specifies command-line options separated by spaces.
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