Sorting List<Map<String, Object>>

Question

I am having the below object

List<Map<String, Object>> listMap = new ArrayList<Map<String, Object>>();

How do i sort this based on the value ("Object") in the Map?

Jigar Joshi · Accepted Answer · 2011-03-08 10:33:12Z

8

Create your own Comparator and use it .

List<Map<String, Object>> listMap = new ArrayList<Map<String, Object>>();
Collections.sort(listMap,new Comparator<Map<String, Object>>() {

            public int compare(Map<String, Object> o1, Map<String, Object> o2) {
                //your logic goes here
            }
});

answered Mar 8, 2011 at 10:33

Jigar Joshi

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Luixv · Accepted Answer · 2011-03-08 10:36:43Z

2

Use your own Comparator (You have to implement the given interface)

answered Mar 8, 2011 at 10:36

Luixv

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Comments

vikash · Accepted Answer · 2020-03-12 11:14:44Z

1

One of the easiest ways to solve using Java 8 is :

Collections.sort(listMap, Comparator.comparing(map -> (String)map.get("key")));

Or,

listMap = listMap.stream().sorted(Comparator.comparing(map -> (String)map.get("key"))).collect(Collectors.toList());

Note: I have converted key(Object) into String. You can use as per your requirements.

answered Mar 12, 2020 at 11:14

vikash

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