Page 335 - Computer_Science_F5

Computer Science Program Example 5.3:

Java program to demonstrate static variable

public class LibraryBooks {
FOR ONLINE READING ONLY
// Static variable declared using the static keyword
static int ChkBookValue = 30;
public void getTitle() {
// Accessing the static variable within the method
System.out.println(“Number of books in shelves: “ + ChkBookValue);
}
public static void main(String[] args) {
// Calling the static variable directly without creating an object
System.out.println(“Number of books in shelves (direct access): “ + LibraryBooks.
ChkBookValue);
// Creating an object of the class to access the method
LibraryBooks obj = new LibraryBooks();
// Calling the method which uses the static variable
obj.getTitle();
}
}

Operators
In Java, an operator refers to a symbol utilised for executing specific actions or
operations. Java offers a diverse array of operators designed to manipulate variables.
These include symbols such as +, -, *, and /, among others. Java operators can be
categorised into several groups, including:

(a) Arithmetic operators
This include Multiplicative: *, /, % and Additive: +, -. The arithmetic operators
function similarly to those in algebra, allowing for various arithmetic operations.
The Table 5.7 below illustrates these operators. For example, when integer A = 5,
B = 15, the output is shown.

Table 5.7: Arithmetic operators

Operator Description Example Output
+(Addition) Adds values A &B A+B 20
-(Subtraction) Subtracts B from A A-B -10

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for Advanced Secondary Schools

Computer Science Form 5.indd 326 23/07/2024 12:34