Answers for "how to get all keys in hashmap"

Java get list of keys Hashmap

List<String> l = new ArrayList<String>(map.keySet());

Posted by: Guest on May-17-2021

How to get all the key in map in array

Set<Integer> keys = map.keySet();
	
	int[] array = new int[keys.size()];
    int index = 0;
    for(Integer element : keys) array[index++] = element.intValue();
    
	for(int i : array) System.out.println(i);

Posted by: Guest on March-14-2021

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