// Create first an builder with the compilation type and cast it
JsonFileSerializer serializer = (JsonFileSerializer) new FileSerializerBuilder().type(CompilationType.JSON).get();
// write your data, Warning: the json serializer need keys !
serializer.writeObject("int", 192);
serializer.writeObject("string", "test");
serializer.writeObject("float", 42.5f);
// and for creating the file, juste call "compile"
// method with the target file
long execTime = serializer.compile(new File("data")); // You can get the time of the building task
// Don't forget to close the serializer !
serializer.close();

// Create first an builder with the compilation type and the file and cast it
JsonFileDeserializer deserializer = (JsonFileDeserializer) new FileDeserializerBuilder().type(CompilationType.JSON).file(new File("data")).get();
// read your data, the Deserializer has DataInputStream as superclass, Warning: the json deserializer need keys !
int resultInt = deserializer.readInt("int");
String resultString = deserializer.readUTF("string");
float resultFloat = deserializer.readFloat("float");
// Don't forget to close the deserializer !
serializer.close();