Do you know what is the difference between j2se 5.0 and j2se 1.4.2?

In many ways, Tiger (JDK 1.5) represents a fundamental improvement in the Java language that hasn't been seen since the emergence of the Java Foundation Classes (JFC).In addition to offering bug fixes and new classes, Tiger offers several new language features and an implementation of parameterized types called generics. The concept of generics brings Java collections into the world of strong typing and is one of the most conspicuous components missing from JDK 1.4.New language features: For each, autoboxing, enums, static imports, variable arguments. And many other improvements ...