Java: how to convert HashMap<String, Object> to array

java arrays collections hashmap
burntsugar picture burntsugar · Jul 7, 2009 · Viewed 294.5k times · Source

I need to convert a HashMap<String, Object> to an array; could anyone show me how it's done?

Answer

Landon Kuhn picture Landon Kuhn · Jul 7, 2009 
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.

Related questions

Converting 'ArrayList<String> to 'String[]' in Java

How might I convert an ArrayList<String> object to a String[] array in Java?

Read More
How to convert an Array to a Set in Java

I would like to convert an array to a Set in Java. There are some obvious ways of doing this (i.e. with a loop) but I would like something a bit neater, something like: java.util.Arrays.asList(Object[] …

Read More
How to convert List<Integer> to int[] in Java?

This is similar to this question: How to convert int[] to Integer[] in Java? I'm new to Java. How can i convert a List<Integer> to int[] in Java? I'm confused because List.toArray() actually returns an Object[], …

Read More