What is arraylist e?
What does sprintf return?
How many types of syncronization?
Can we have any other return type than void for main method?
Say you want to store the information about a number of pets in an array. Typical information that you could store for each pet (where relevant) would be • Breed of animal • Animal's name • Its birth date • Its sex • Whether it has been sterilised or not • When it is due for its next inoculation • When it last had its wings clipped For each type of pet (eg. dog, cat or bird) you would typically define a class to hold the relevant data. Note: You do not need to implement these classes. Just answer the following questions. 3.1.1 What would be the advantage of creating a superclass (eg. Pet) and declaring an array of Pet objects over simply using an array of Objects, storing each of the instances of the different pet classes (eg. Dog, Cat or Bird) in it? 3.1.2 Would you define Pet as a class or as an interface? Why? (2) (2)
What is difference between arraylist and list in java?
can we create a instance for intwerface?
How do you change an int to a string?
Which collection is thread safe in java?
What are basic data types?
What are Font and FontMetrics classes?
What is difference between an object and a class?
What is your platform?s default character encoding and how to know this?