HashMap is an object that store item in the form of “key-value” pair. Here, In this post, we will see “how to create a HashMap object in Java and how to iterates its data with the help of ArrayList?”
Easiest representation of HashMap example in Java using ArrayList...!!! Click To TweetSyntax:
1 | Map<String, String> map = new HashMap<String, String>(); |
Example
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Set; public class HashMapSample { public static void main(String[] args) { Map<String, String> map = new HashMap<String, String>(); map.put("name1", "yogi"); //name1 - key & yogi - value map.put("id1", "100"); map.put("age1", "6"); map.put("name2", "dv"); map.put("id2", "1000"); map.put("age2", "2"); List<Map<String, String>> keysString = Arrays.asList(map); for(Map<String, String> key : keysString) { System.out.println(key); } } } |
Output:
1 | {id2=1000, id1=100, name2=dv, name1=yogi, age2=2, age1=6} |
Easiest representation of HashMap example in Java using ArrayList...!!! Click To Tweet
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Thanks for saving me time. I was looking for such a light example.
thank you Esther.