Filesystem Size Used Avail Use% Mounted on
/dev/sda1 39G 20G 17G 55% /
/dev/sda3 186G 175G 1.4G 100% /rhel5pdi
tmpfs 755M 0 755M 0% /dev/shm
Kathy Sierra 6 .SCJP book . In Page 618 of the book that i have wrote:
public void addAnimal(List<? extends Animal> animals)
By saying <? extends Animal>, we're saying, "I can be assigned a collection
that is a subtype of List and typed for <Animal> or anything that extends Animal.
And oh yes, I SWEAR that I will not ADD anything into the collection."
No enclosing instance of type one is accessible to invoke the super constructor. Must define a constructor and explicitly qualify its super constructor invocation with an instance of one (e.g. x.super() where x is an instance of one).
Jesper Young wrote:To solve this problem, you need some kind of persistent store, whether it's a database, a file system or something else.