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ClassName() {
Computer Science Exercise 5.2 (b) Importance of using constructors
// constructor body
1. Create a class named MyFamily
}
utilising keywords “public” and
“class”.
FOR ONLINE READING ONLY
2. Use the class MyFamily, create the
object called “OurGarden” using (i) Guaranteed initialisation:
Constructors guarantee that
the keyword “New”. objects are created with their
3. Write codes that will use the object properties properly initialised,
“OurGarden” to access and print preventing potential errors or
the value of any variable declared unexpected behavior caused by
with integer data type in the class uninitialised properties.
MyFamily.
(ii) Flexibility: By creating
constructors with different
Constructors and destructors in arguments, you have the
Java flexibility to customize the initial
In Java, constructors and destructors state of your objects according
play crucial roles in OOP. Constructors to specific requirements or
are special methods used to initialise preferences.
objects and are called automatically
upon object instantiation. Java does (c) Creating constructors
not have destructors like C++, relying
instead on garbage collection to manage When you create a constructor in
memory by cleaning up unused objects. Java, adhere to the following steps as
demonstrated in Program Example 5.18.
Constructors in Java Steps to develop constructor:
Constructors are special methods in a
st
class that are automatically called when 1 Step: Declare a method with the same
objects are created from that class. They name as the class.
initialise objects when they are created. 2 Step: Do not specify both return type
nd
They have the same name as the class
and does not have a return type. They and void for the constructor.
ensure objects are in a valid state from 3 Step: Provide parameters to the
rd
the beginning. constructor to initialise the object with
specific values and perform any required
(a) Syntax for a constructor initialisation or setup for the object
Any constructor have a name and within a constructor.
follows a syntax as shown below:
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for Advanced Secondary Schools
Computer Science Form 5.indd 348 23/07/2024 12:34
