Introduction Sites that are running their applications on Java 1.4 still exist. In case you are developing an application that supports Java 1.4 and later versions, you may find implementation issues similar to the list below. Java Language Not Supported Enhanced for Loop (Using ":" in for loop) - Since Java 5 Generics - Since Java 5 Metadata (Annotations) - Since Java 5 Base Libraries Not Supported String.format() - Since Java 5 StringBuilder - Since Java 5 Loading Properties Not Supported public void load(Reader reader) throws IOException - Since Java 6 Supported public void load(InputStream input) throws IOException Parsing XML Not Supported JAXB - Since Java 6 Supported JAXP RSA Algorithm Not Supported RSA Solution Use Bouncy Castle as a JCE Security Provider. https://www.bouncycastle.org/latest_releases.html References New Features and Enhancements J2SE 5.0 New Features and Enhancements J2SE 6 Java S...