When NetBeans 7 (or NetBeans 3.6) is compiling with -source 1.4 enabled, why doesn't it warn when compiling with methods (or classes) introduced @since 1.5 or @since 1.6?
The javac docs imply that the -source option is about language features, not library features.
-source release
Specifies the version of source code accepted. The following values for release are allowed:
1.3 The compiler does not support assertions, generics, or other language features introduced after JDK 1.3.
1.4 The compiler accepts code containing assertions, which were introduced in JDK 1.4.
1.5 The compiler accepts code containing generics and other language features introduced in JDK 5.
5 Synonym for 1.5.
1.6 This is the default value. No language changes were introduced in Java SE 6. However, encoding errors in source files are now reported as errors, instead of warnings, as previously.
6 Synonym for 1.6.