Print big and small number

BigSmall.java

package Day2;
import java.util.Scanner;

public class BigSmall {
    int num1;
    int num2;
    int num3;

    public void readNumber() {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter number: ");
        num1 = sc.nextInt();
        System.out.println("Enter number: ");
        num2 = sc.nextInt();
    }

    public void max() {
        if (num1 > num2 && num1 > num3) {
            System.out.println("Greatest number is: " + num1);
        } else if (num2 > num1 && num2 > num3) {
            System.out.println("Greatest number is: " + num2);
        } else {
        System.out.println("Greatest number is: " + num3);
    }

    public void min(){
        if (num1 < num2 && num1 < num3) {
            System.out.println("Smallest number is: " + num1);
        } else if (num2 < num1 && num2 < num3) {
            System.out.println("Smallest number is: " + num2);
        } else {
            System.out.println("Smallest number is: " + num3);
        }
    }
}