GreatestOfFour.java

import java.util.Scanner;

public class GreatestOfFour {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Please enter first number: ");
        int number1 = sc.nextInt();
        System.out.println("Please enter second number: ");
        int number2 = sc.nextInt();
        System.out.println("Please enter third number: ");
        int number3 = sc.nextInt();
        System.out.println("Please enter fourth number: ");
        int number4 = sc.nextInt();
        if(number1 > number2)
        {
            if(number1 > number3)
            {
                if(number1 > number4)
                {
                    System.out.println("Largest of four numbers is: " + number1);
                }
                else
                {
                    System.out.println("Largest of four numbers is: " + number4);
                }
            }
        }
        else if(number2 > number3)
        {
            if(number2 > number4)
            {
                System.out.println("Largest of four numbers is: " + number2);
            }
            else
            {
                System.out.println("Largest of four numbers is: " + number4);
            }
        }
        else if(number3 > number4)
        {
            System.out.println("Largest of four numbers is: " + number3);
        }
        else
        {
            System.out.println("Largest of four numbers is: " + number4);
        }
        sc.close();
    }
}