Java java.util Map

• Java

• java.util

• • java.util

  • AbstractList

  • ArrayDeque

  • ArrayList

  • Arrays

  • Base64

  • BitSet

  • Calendar

  • Collection

  • Collections

  • Comparator

  • Currency

  • Date

  • Deque

  • DoubleSummaryStatistics

  • EnumMap

  • EnumSet

  • EventListener

  • EventObject

  • Formatter

  • GregorianCalendar

  • HashMap

  • HashSet

  • Hashtable

  • IntSummaryStatistics

  • Iterator

  • LinkedHashMap

  • LinkedHashSet

  • LinkedList

  • List

  • ListIterator

  • ResourceBundle

  • Locale

  • LongSummaryStatistics

  • Map

  • NavigableMap

  • Objects

  • Observer

  • Optional

  • OptionalInt

  • PriorityQueue

  • Properties

  • Queue

  • Random

  • Scanner

  • Set

  • SortedMap

  • SortedSet

  • Spliterator

  • Stack

  • StringTokenizer

  • TimerTask

  • TimeZone

  • TreeMap

  • TreeSet

  • UUID

  • Vector

Introduction

1. Java Map interface
2. Java Map check if a key exists
3. Java Map check value exitance
4. Java Map convert to Hashtable
5. Java Map convert to read only map
6. Java Map convert to synchronized Map
7. Java Map count word frequency
8. Java Map create an unmodifiable map



9. Java Map create from List using the index as key
10. Java Map create from of method
11. Java Map create integer to List of String map
12. Java Map create map from String to int array
13. Java Map create map using custom object as key
14. Java Map for each with Lambda expression
15. Java Map get key set
16. Java Map get key value set



17. Java Map get size
18. Java Map get value for a key with default value
19. Java Map iterate value set
20. Java Map iterate via key set
21. Java Map iterate via key-value entry set
22. Java Map join to String
23. Java Map merge value
24. Java Map put key value pair if key is absent
25. Java Map remove all key value pairs
26. Java Map remove by key value pair
27. Java Map remove key value pair by key
28. Java Map set new value computed from Lambda expression
29. Java Map sort key value pair on value with duplicate values
30. Java Map sort keys by numerical value descending order
31. Java Map sort on key and store new map via LinkedHashMap
32. Java Map store comma separated values with numbered key
33. Java Map store custom object
34. Java Map update during iteration
35. Java Map use null value as key