CLOSE REVIEWUse a static variable to count instances of a class
Create a class named Student with a static variable count of type int. Initialize it to 0. Then, create a constructor for the class that increases the value of count by 1 every time a new instance of the class is created. Finally, create a static method named getCount that returns the current value of count.
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Java
import java.util.Scanner;
class Student {
// Declare your static variable here
// Implement your constructor here
// Implement your method here
}
// Testing mechanism - do not modify!
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int num = in.nextInt();
for (int i=0; i<num; i++) {
new Student();
}
System.out.println(Student.getCount());
}
}
STDIN
10
Expected STDOUT
10
Your STDOUT
10
STDIN
35
Expected STDOUT
35
Your STDOUT
35
STDIN
103
Expected STDOUT
103
Your STDOUT
103
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Instructor solution
Alec KretchAPR 22, 2024, 7:17:55 PM
Java
import java.util.Scanner;
class Student {
static int count = 0;
Student() {
count++;
}
static int getCount() {
return count;
}
}
// Testing mechanism - do not modify!
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int num = in.nextInt();
for (int i=0; i<num; i++) {
new Student();
}
System.out.println(Student.getCount());
}
}
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Think you've got it?
What will be the value of count after creating 5 instances of the Student class?
Select one of the following options:
- A.
1
- B.
0
- C.
10
- D.
5
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