difference between servletconfig and servletcontext in java

ServletConfig is implemented by the servlet container to initialize a single servlet using init().

ServletContext is implemented by the servlet container for all servlet to communicate with its servlet container, for example, to get the MIME type of a file, to get dispatch requests, or to write to a log file.

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ServletContext : Defines a set of methods that a servlet uses to communicate with its servlet container, for example, to get the MIME type of a file, dispatch requests, or write to a log file.The ServletContext object is contained within the ServletConfig object, which the Web server provides the servlet when the servlet is initialized .

ServletConfig : The object created after a servlet is instantiated and its default constructor is read. It is created to pass initialization information to the servlet.