Page 261 - ComputerScience_Class_11

Let us see an example given below:
Write a program that uses a static variable increase and a method incre() to increment it.
Program 9
Display the value of increase before and after calling the method using two objects.
1 class counter

2 {
3 static int increase=0;
4 static void incre()

5 {
6 increase++;
7 }

8 void display()
9 {
10 System.out.println("Counter : "+ increase);

11 }
12 public static void main(String[] args)
13 {

14 counter ob1=new counter();
15 counter ob2=new counter();
16 ob1.display();

17 ob1.incre();
18 ob1.display();
19 ob2.incre();

20 ob2.display();
21 }
22 }

The output of the preceding program is as follows:

BlueJ: Terminal Window - Java
Options

Counter : 0
Counter : 1
Counter : 2

“increase” is a static variable and it increases by 2 values as two objects are created and only one static variable is
created for both objects.
c. Local Variables: These variables are accessed within a function only. The scope of it ends when the method ends
(i.e., on encountering the closing brace of the method).
d. Constructors: They are the methods that have the same name as that of a class and are used to initialise the
instance variables.

Methods and Constructors 259