//: generics/GenericWriting.java
import java.util.*;
public class GenericWriting {
static void writeExact(List list, T item) {
list.add(item);
}
static List apples = new ArrayList();
static List fruit = new ArrayList();
static void f1() {
writeExact(apples, new Apple());
// writeExact(fruit, new Apple()); // Error:
// Incompatible types: found Fruit, required Apple
}
static void
writeWithWildcard(List super T> list, T item) {
list.add(item);
}
static void f2() {
writeWithWildcard(apples, new Apple());
writeWithWildcard(fruit, new Apple());
}
public static void main(String[] args) { f1(); f2(); }
} ///:~