Map

• Map - classes HashMap LinkedHashMap TreeMap

  • clear()
  • containsKey(key)
  • containsValue(value)
  • get(key) - give value associated with key
  • isEmpty()
  • put(key, value)
  • remove(key)
  • putIfAbsent(key, value) - set value only if key is not present

• HashMap unordered

• TreeMap LinkedHashMap - ordered