The most basic rule of GNU Make and the environment is that any variable set in the environment when GNU Make is started will be available as a GNU Make macro inside the Makefile. For example, if FOO is set in the environment to foo when GNU Make is run then the following Makefile: $(warning $(FOO))
Object and Class Structures,
Type Checking and New Types,
Initializing a New Class,
GtkArg and the Type System,
Object Arguments,
Signals,
Object Finalization,
Attaching Data to Objects
In this excerpt, one of a series from Java Network Programming, 3rd Edition, Elliotte Rusty Harold demonstrates Java's handling of URLs, URIs, proxy servers, password protection, and HTTP GET.