Convert Lowercase To Uppercase In Java – Java JSON Formatting

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Use Convert Lowercase To Uppercase In Java instantly – format, validate, minify, or convert your JSON data.

Java developers use Jackson or Gson to handle JSON formatting and pretty‑printing.

Jackson (pretty-print)

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

ObjectMapper mapper = new ObjectMapper().enable(SerializationFeature.INDENT_OUTPUT);
String prettyJson = mapper.writeValueAsString(myObject);

Gson (pretty-print)

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

Gson gson = new GsonBuilder().setPrettyPrinting().create();
String prettyJson = gson.toJson(myObject);

Read JSON from file (Jackson)

MyObject obj = mapper.readValue(new File("data.json"), MyObject.class);