Class java.util.HashMap

Added Methods
V compute(K, BiFunction<?, super, K, ?, super, V, ?, extends, V>)  
V computeIfAbsent(K, Function<?, super, K, ?, extends, V>)  
V computeIfPresent(K, BiFunction<?, super, K, ?, super, V, ?, extends, V>)  
V getOrDefault(Object, V)  
V merge(K, V, BiFunction<?, super, V, ?, super, V, ?, extends, V>)  
V putIfAbsent(K, V)  
boolean remove(Object, Object)  
V replace(K, V)