What is "Tiger"?
"Tiger" was the code name for Java 2 Platform Standard Edition (J2SE) 5.0 that released on September 29th, 2004. This major release included over a dozen JSRs and nearly 100 other significant updates from the JCP. You should note that this can also be considered developer release 1.5.0.
This release included features such as the addition of generics, an enhanced for loop, enumerated types, static imports, automatic boxing of primitive types, dynamic proxy names, and much more.