Navigate to the Java Class you are interested. Based on the Java Class, you will see Java-5.0, J2SDK-1.4, J2SDK-1.3, JDK-1.2, JDK-1.1.8, J2EE-1.4, J2EE-1.3, and J2EE-1.2 links in DocJar's menu frame. Click the link will bring you to the official Java document.