Several Implementation Issues in Supporting Java 1.4

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 SE 7 Features and Enhancements