Java / Generics
Explain Generics using a sample code.
In the above example, ArrayList can hold any type of objects, however we need to cast each object to its appropriate data type since get method's return type is Object. A string literal is added to the list and to get it from the list we need cast and store it.
If we store an employee object for example at the first index, then the 3rd line of code will throw a run-time Exception.
In the above code, the example is rewritten using generics, and the list is strongly typed that requires no casting.
Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.
The Robinhood app makes it easy to trade stocks, crypto and more.
More Related questions...