Answer Posted / ganesh slv

You can create one or more classes in single file. Only one
class may be declared as public. This is your Optional.

If you declared a class as public, your file name should be
the save of your class name.

Public class can be accessible from other applications.
Example, your applet code can be run in a web browser. This
public class may execute other classes in the same file.

If you declared two classes as public, your file name will
be what?

Note the Example :

class First {
// Some codes here
}

public class Second {
// some codes here
// In core, your main method should be here.
// You have to save the file as Second.
}

what is ststic with example

2125

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1103

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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)

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