IonSystem system = IonSystemBuilder.standard().build(); IonValue value = system.newString("Hello World"); String ionText = "{ name: 'John', age: 30 }"; IonReader reader = system.newReader(ionText); reader.stepIn(); while (reader.next() != null) { String fieldName = reader.getFieldName(); IonType fieldType = reader.getType(); String fieldValue = reader.stringValue(); System.out.println(fieldName + ": " + fieldValue); } reader.stepOut();