Java: how to convert HashMap to array

by 
hashMap.keySet().toArray(); // returns an array of keys
hashMap.values().toArray(); // returns an array of values

Edit

It should be noted that the ordering of both arrays may not be the same,
See oxbow_lakes answer for a better approach for iteration when the pair key/values are needed.

More Related Contents:

  1. Does Java JIT compiler sacrifice performance to favor Collections?
  2. What are the differences between a HashMap and a Hashtable in Java?
  3. How can I convert List to int[] in Java? [duplicate]
  4. How to convert int[] into List in Java?
  5. Which Java Collection should I use?
  6. Convert an array of primitive longs into a List of Longs
  7. How to convert an Array to a Set in Java
  8. How can I convert int[] to Integer[] in Java?
  9. Why there is no ConcurrentHashSet against ConcurrentHashMap
  10. Can an array be used as a HashMap key?
  11. Lambda expression to convert array/List of String to array/List of Integers
  12. Java – generate Random range of specific numbers without duplication of those numbers – how to?
  13. Performance ConcurrentHashmap vs HashMap
  14. “Cannot create generic array of ..” – how to create an Array of Map?
  15. Why does Collections.sort use Mergesort but Arrays.sort does not?
  16. Best way to create a hashmap of arraylist
  17. How to make HashMap work with Arrays as key?
  18. How can I generate a list or array of sequential integers in Java?
  19. Converting string arrays into Map
  20. get string value from HashMap depending on key name
  21. Is there a way to get the value of a HashMap randomly in Java?
  22. Difference between HashSet and HashMap?
  23. The easiest way to transform collection to array?
  24. ArrayList: how does the size increase?
  25. How to create ArrayList (ArrayList) from array (int[]) in Java
  26. Iterate through string array in Java
  27. Shortcut for adding to List in a HashMap
  28. How does ConcurrentHashMap work internally?
  29. Comparing two hashmaps for equal values and same key sets?
  30. How to convert an int[] array to a List?

Leave a Comment