Only the Java HotSpot Server VM is supported so the -server A 64-bit capable jdkĬurrently ignores this option and instead uses the Javaįor default VM selection, see Server-Class Machine InĪddition, the default Java HotSpot VMs provide a set of Options that are supported on the current runtimeĮnvironment and will be supported in future releases. The javaw launcher will, however, display a dialog box with error information if a launch fails for some reason. Use javaw when you don't want a command prompt window to appear. The javaw command is identical to java, except that with javaw there is no associated console window. Non-option arguments after the class name or JAR file name are passed to the main function. The Java runtime searches for the startup class, and other classes used, in three sets of locations: the bootstrap class path, the installed extensions, and the user class path.
#What is jar launcher archive
If the -jar option is specified, the first non-option argument is the name of a JAR archive containing class and resource f iles for the application, with the startup class indicated by the Main-Class manifest header. A fully-qualified class name should be used. The method declaration must look like the following: public static void main(String args)īy default, the first non-option argument is the name of the class to be invoked.
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The method must be declared public and static, it must not return any value, and it must accept a String array as a parameter.
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It does this by starting a Java runtime environment, loading a specified class, and invoking that class's main method. The java tool launches a Java application. argument Argument passed to the main function. file.jar Name of the jar file to be invoked.