Demo

package Exam26March2016;

import java.text.DecimalFormat;
import java.util.Scanner;

public class Demo {
        public static void main(String[] args) {
            Scanner scanner = new Scanner(System.in);
            int v = Integer.parseInt(scanner.nextLine());
            int p1 = Integer.parseInt(scanner.nextLine());
            int p2 = Integer.parseInt(scanner.nextLine());
            double h = Double.parseDouble(scanner.nextLine());

            double vol1=h*p1;
            double vol2=h*p2;
            double totalvol=vol1+vol2;
            double fullpercent=(totalvol/v)*100;
            double percent1=(vol1/totalvol)*100;
            double percent2=(vol2/totalvol)*100;
            if (totalvol<=v){
                System.out.printf("The pool is %d%% full. Pipe 1: %d%%. Pipe 2: %d%%.", (int)fullpercent, (int)percent1, (int)percent2);

            }
            else {
                DecimalFormat df = new DecimalFormat("0.##");
                System.out.printf("For %s hours the pool overflows with %.1f liters.", df.format(h), totalvol-v);

            }
        }

    }