Java: Out with the Old, In with the New

Question

Java is nearing version 7. It occurs to me that there must be plenty of textbooks and training manuals kicking around that teach methods based on older versions of Java, whe

Answer 1

Explicit conversion between primitive and wrapper types (e.g. Integer to int or vice versa) which is taken care of automatically by autoboxing/unboxing since Java 1.5.

An example is

Integer myInteger = 6;
int myInt = myInteger.intValue();

Can simply be written as

Integer myInteger = 6;
int myInt = myInteger;

But watch out for NullPointerExceptions :)