Just to back what an earlier poster said, if we're
referring to the Spring
framework (which BTW is
not an implementation of Java it is just a set of
libraries)
then it is definitely the case that they use the Java API's.
Here is but one example from the official SpringSource
github repository:
org.springframe
work.core.CollectionFactory
And from the imports you can see which Java
API's are used:
import java.util.ArrayList;
import
java.util.Collection;
import java.util.HashMap;
import
java.util.HashSet;
import java.util.IdentityHashMap;
import
java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import
java.util.LinkedList;
import java.util.List;
import
java.util.Map;
import java.util.Set;
import
java.util.SortedMap;
import java.util.SortedSet;
import
java.util.TreeMap;
import java.util.TreeSet;
import
java.util.concurrent.ConcurrentHashMap;
import
java.util.concurrent.CopyOnWriteArraySet;
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