Java generics

Provides compile-time type safety for collections and eliminates the pain of casting. Generics creates strongly typed classes to do generic operation.

1 Vector v = new Vector();
2 v.add("hello");
3 v.add(new Integer(1));
4 v.add(new HashTable());
5 
6 String s = (String)v.get(0);

• Performs strongly type check in compile time
• Eliminates casting
• Enable programmers to implement generic algorithms, which can be used on different types.

Java generics

原文：http://www.cnblogs.com/touchdown/p/5199685.html