Json-lib comes in two flavors, depending on the jdk compatibility. json-lib-x.x-jdk13 is compatible with JDK 1.3.1 and upwards. json-lib-x.x-jdk15 is compatible with JDK 1.5, includes support for Enums in JSONArray and JSONObject. Please reffer to the appropriate javadoc links available in the project menu.
Json-lib requires (at least) the following dependencies in your classpath:
jakarta commons-lang 2.5
jakarta commons-beanutils 1.8.0
jakarta commons-collections 3.2.1
jakarta commons-logging 1.1.1