How does urlclassloader work in Java?
How does urlclassloader work in Java?
From the Javadocs for the URLClassLoader (URL []) constructor: Constructs a new URLClassLoader for the specified URLs using the default delegation parent ClassLoader. The URLs will be searched in the order specified for classes and resources after first searching in the parent class loader.
What is the use of a class loader in Java?
It is essential to execute a Java program. Java ClassLoader is based on three principles: Delegation, Visibility, and Uniqueness. Delegation principle: It forwards the request for class loading to parent class loader. It only loads the class if the parent does not find or load the class.
What is the search order of a urlclassloader?
The search order is described in the documentation for ClassLoader.getResource (String). Closes this URLClassLoader, so that it can no longer be used to load new classes or resources that are defined by this loader. Classes and resources defined by any of this loader’s parents in the delegation hierarchy are still accessible.
How do I refer to a class file in a URL?
Otherwise, the URL is assumed to refer to a JAR file which will be downloaded and opened as needed. So you have two options: Refer to the directory that the .class file is in Put the .class file into a JAR and refer to that (1) is easier in this case, but (2) can be handy if you’re using networked resources.
How are the URLs searched in the parent class loader?
The URLs will be searched in the order specified for classes and resources after first searching in the parent class loader. Any URL that ends with a ‘/’ is assumed to refer to a directory. Otherwise, the URL is assumed to refer to a JAR file which will be downloaded and opened as needed. So you have two options:
What is scalascriptmojo urlclassloader?
ScalaScriptMojo.createScriptClassloader (…) This class loader is responsible for loading classes and resources from a list of URLs which can refer to either directories or JAR files. Classes loaded by this URLClassLoader are granted permission to access the URLs contained in the URL search list.
