There seems to be no example in the spec which shows the usage of constraints on generic types:

public class Student<V extends Number> {
		
    Student(V v) {
        this.v = v;
    } 
 
    @Max(6)
    V v;
}

j.l.Number can be resolved for the type parameter V here, thus the @Max constraints is legitimate. Whereas V can only be resolved to j.l.Object in the following example, rendering the constraint illegal:

public class Student<V> {
		
    Student(V v) {
        this.v = v;
    } 
 
    @Max(6)
    V v;
}

A TCK test may be required for this as well, I couldn't find one.