import java.util.ArrayList; | |
import java.util.Collection; | |
class C<T> { | |
void foo1(Collection<? extends T> src) { | |
T t = src.iterator().next(); | |
} | |
void foo2(ArrayList<? extends T> src) { | |
T t = src.iterator().next(); | |
} | |
void foo3(Collection<? super T> dst, T t) { | |
dst.add(t) | |
} | |
int foo4(Comparable<? super T> comparable, T t) { | |
return comparable.compareTo(t); | |
} | |
void foo5(Collection<?> w) { | |
} | |
} |