Why does javac complain about generics not related to class type arguments?

Question

Please read the comments in the code in order, there are details of the question.
Why is this difference happening?
Please specify JLS if possible.

import java.util.*;

/**
 * Suppose I have a generic class
 * @param <T> with a type argument.
 */
class Generic<T> {
    // Apart from using T normally,
    T paramMethod() { return null; }
    // the class' interface also contains Generic Java Collections
    // which are not using T, but unrelated types.
    List<Integer> unrelatedMethod() { return null; }
}

@SuppressWarnings("unused")
public class Test {
    // If I use the class properly (with qualified type arguments)
    void properUsage() {
        Generic<String> g = new Generic<String>();

        // everything works fine.
        String s = g.paramMethod();
        List<Integer> pos = g.unrelatedMethod();

        // OK error: incompatible types: List<String> := List<Integer>
        List<String> thisShouldErrorCompile = g.unrelatedMethod();
    }

    // But when I use the raw type, *ALL* the generics support is gone, even the Collections'.
    void rawUsage() {
        // Using Generic<?> as the type turns fixes the warnings below.
        Generic g = new Generic();

        // OK error: incompatible types: String := Object
        String s = g.paramMethod();

        // WTF warning: unchecked conversion: List<Integer> := raw List
        List<Integer> pos = g.unrelatedMethod();

        // WTF warning: unchecked conversion: List<String> := raw List
        List<String> thisShouldErrorCompile = g.unrelatedMethod();
    }
}

Side note

I initially found this in IntelliJ IDEA, but I think the compiler is compatible with javac, because when I compiled the above code with the following, it gave the same errors / warnings.

$ javac -version
javac 1.7.0_05
$ javac Test.java -Xlint:unchecked
...
$ javac Test.java -Xlint:unchecked -source 1.5 -target 1.5
...

Answer 1

From JLS 4.8 Raw Types

raw . , Java, .

(§8.8), (§8.4, . 9.4) (§8.3) , , , , C.

- - , , , .