Method containsKey

core/src/main/jdk1.1/java/util/Map.java:24–24

(Object Key)

        public int size();
        public boolean isEmpty();
        public boolean containsKey(Object Key) throws ClassCastException,NullPointerException;
        public boolean containsValue(Object value);
        public Object get(Object key)throws ClassCastException,NullPointerException;
        public Object put(Object key,Object value)throws UnsupportedOperationException, ClassCastException,IllegalArgumentException,NullPointerException;