Using a generic type with Gson

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The simplest approach for what you are attempting is to define the type of class which is to be returned in the method signature itself. You can do so by either passing an instance of ‘T’ to the method or the Class of the value to be returned. The second approach is the more typical in cases where you expect to generate a return value. Here is an example of this approach using Gson: 

public <T> T deserialize(String jsonString, Class<T> clazz) {
    GsonBuilder builder = new GsonBuilder();
    builder.setDateFormat("MM/dd/yy HH:mm:ss");

    Gson gson = builder.create();
    return gson.fromJson(jsonString, clazz);
}

Usage: 

MyClass mc = deserialize(jsonString, MyClass.class);

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