CLOSE REVIEWImplement a static variable in a class
Create a class named Counter with a static variable count of type int. Initialize it to 0. Then, create a method named increment that increases the value of count by 1 every time it is called. Finally, create a method named getCount that returns the current value of count.
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Java
import java.util.Scanner;
class Counter {
// Declare your static variable here
// Implement your methods 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++) {
Counter.increment();
}
System.out.println(Counter.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, 7:17:17 PM
Java
import java.util.Scanner;
class Counter {
static int count = 0;
static void increment() {
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++) {
Counter.increment();
}
System.out.println(Counter.getCount());
}
}
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Think you've got it?
What is the purpose of a static variable in a class?
Select one of the following options:
- A.
A static variable is unique to each instance of a class.
- B.
A static variable is a variable that cannot be changed.
- C.
A static variable can only be used inside static methods.
- D.
A static variable is shared among all instances of a class.
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