Level 8: level plan and extras. materials

Level Plan:

• Collections: LinkedList, HashSet, HashMap. Date - date.
• Collections Set is a set, List is a list, Map is a dictionary (or map).
• List -> ArrayList, LinkedList, Vector, Stack.
• Set -> HashSet, TreeSet, SortedSet.
• Map -> HashMap, TreeMap, SortedMap, Hashtable.
• Implementation differences
• Working with Iterators Iterator. Methods hasNext(), next()
• Map.Entry. Methods getKey(), getValue()
• Working with dates - the Date class.

This level explores an overview of collections. Detailed in-depth study will be at 30+ levels.

What else can you look at at your leisure: Read about collections Article on Habré about ArrayList Article on Habré about LinkedList http://habrahabr.ru/post/128017/ Example of deleting records from a map: Map map = new HashMap<>(); map.put("1", "2"); map.put("3", "4"); Map mapCopy = new HashMap<>(map); for(Map.Entry pair : mapCopy.entrySet()) { map.remove(pair.getKey()); }

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