Benefits of Generic class and interfacesuggest change
Code that uses generics has many benefits over non-generic code. Below are the main benefits
Stronger type checks at compile time
A Java compiler applies strong type checking to generic code and issues errors if the code violates type safety. Fixing compile-time errors is easier than fixing runtime errors, which can be difficult to find.
Elimination of casts
The following code snippet without generics requires casting:
List list = new ArrayList(); list.add("hello"); String s = (String) list.get(0);
When re-written to use generics, the code does not require casting:
List<String> list = new ArrayList<>(); list.add("hello"); String s = list.get(0); // no cast
Enabling programmers to implement generic algorithms
By using generics, programmers can implement generic algorithms that work on collections of different types, can be customized, and are type safe and easier to read.