Chapter 9, Problem 3AW

Program Plan Intro

Initializing an array of a class type:

• Each element in a class array acts as a reference variable to the objects of the class.
• In order to initialize an array of class type, there are different ways to set the objects of the reference variable.

Method 1:

• Initialization of class array variables can be done at the declaration of the array class variable.
• For example, the below given statement illustrates how to initialize reference variables to the Employee class objects in the declaration itself.

  Employee[] employeeList=new Employee[5];

• In the above given statement, each object of Employee class is stored in array variable employeeList by instantiating Employee class as follows.

  employeeList[0]=new Employee();

  employeeList[1]=new Employee();

  employeeList[2]=new Employee();

  employeeList[3]=new Employee();

  employeeList[4]=new Employee();

Method 2:

• The reference variables of the array class can be initialized in a loop.
• For example, the below given statement illustrates how to store the Employee class objects in an array reference variable in for loop.

for(int index=0;condition; increment)

{

    employeeList[index]=new Employee();

}