Class.getResource and Classloader.getresource's path notation

When fetching resources in Java, Class.getResource and Classloader.getresource are often used here to see their path problems when fetching resource files.

Class.getResource (String Path)

Path   when not beginning with '/', the default is to fetch resources from the package in which the class is located; At the beginning of the '/', it is obtained from the classpath root;

The same usage is class.getresource and class.getresourceasstream.

Class.getclassloader (). GetResource (String Path)

Path cannot start with '/' and it is obtained from the classpath root directory;

The same usage also Class.getclassloader (). GetResource and Class.getclassloader (). getResourceAsStream.

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Class.getResource and Classloader.getresource's path notation