Adding a String to JsonArray

Question

I have a JsonArray which I am getting as a result of call to a method and it looks like - ["#group-apiTest2","#group-apiTest3","#group-apiTest4"] I want to insert one more string - "group-apiTest1" in this JsonArray. So far I tried this but got a different output then expected.

String group1 = "#group-apiTest1";
JsonArray existingArray = ["#group-apiTest2","#group-apiTest3","#group-apiTest4"] //For representation purpose only.
JsonObject jsonRequest = Json.createObjectBuilder().add("tags",
                                Json.createArrayBuilder().add(group1).add(existingArray))
                        .build();
                logger.info("REQUEST - {}", jsonRequest);

The output of the logger is - REQUEST - {"tags":["group-apiTest",["#group-apiTest2","#group-apiTest3","#group-apiTest4"]]} instead of - REQUEST - {"tags":["group-apiTest","#group-apiTest2","#group-apiTest3","#group-apiTest4"]}

Please let me know how to get the expected output. Where am I doing wrong? Thanks.

bharathp · Accepted Answer · 2021-08-18 11:51:47Z

1

You are adding string #group-apiTest1 and array ["#group-apiTest2","#group-apiTest3","#group-apiTest4"]. That's why you see the result as ["group-apiTest",["#group-apiTest2","#group-apiTest3","#group-apiTest4"]]

Please try this code logic

String group1 = "#group-apiTest1";
JsonArray existingArray = ["#group-apiTest2","#group-apiTest3","#group-apiTest4"];
JsonArrayBuilder builder = Json.createArrayBuilder();
builder.add(group1);
existingArray.forEach(builder::add);
JsonObject jsonRequest = Json.createObjectBuilder()
                .add("tags", builder)
                .build();

Since you cannot directly add values to JsonArray you have to create a new builder and add your elements.

answered Aug 18, 2021 at 11:51

bharathp

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Comments

frank · Accepted Answer · 2021-08-18 11:49:39Z

0

I can't see what's wrong.
But please try this:

JsonObject jsonRequest = Json.createObjectBuilder()
                        .add("tags", Json.createArrayBuilder(existingArray).add(0, group1))
                        .build();

answered Aug 18, 2021 at 11:49

frank

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