Consider the following is my Array
[
{"id":10,"name":"name10","valid":true},
{"id":12,"name":"name12","valid":false},
{"id":11,"name":"name11","valid":false},
{"id":9,"name":"name9","valid":true}
]
Created a JsonArray
out of it, like following code does:
//Create a JSON Parser using GSON library
objJsonParser = new JsonParser();
String strArrayText = [{"id":9,"name":"name9","valid":true}, ...]
JsonArray jsonArrayOfJsonObjects = objJsonParser.parse(strArrayText).getAsJsonArray();
Now, I am trying to sort jsonArrayOfJsonObjects
based on name
field.
Desired Output:
[
{"id":9,"name":"name9","valid":true},
{"id":10,"name":"name10","valid":false},
{"id":11,"name":"name11","valid":false},
{"id":12,"name":"name12","valid":true}
]
Could anyone help to sort this out with best apporach with respect to Java & Gson?
Your inputs are greatly appreciated.
First of all, the proper way to parse your JSON is to create a class to encapsulate your data, such as:
public class MyClass {
private Integer id;
private String name;
private Boolean valid;
//getters & setters
}
And then:
Type listType = new TypeToken<List<MyClass>>() {}.getType();
List<MyClass> myList = new Gson().fromJson(strArrayText, listType);
Now you have a List
and you want to sort it by the value of the attribute id
, so you can use Collections
as explained here:
public class MyComparator implements Comparator<MyClass> {
@Override
public int compare(MyClass o1, MyClass o2) {
return o1.getId().compareTo(o2.getId());
}
}
And finally:
Collections.sort(myList, new MyComparator());
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