kill me please

import java.util.Scanner;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class ConvTemperatura {
    private static String format(double temp) {
        String pre = String.format("%.2f", temp);

        String[] arr = pre.split("\\.");

        int whole = Integer.parseInt(arr[0]);
        int dec = 0;

        if(Integer.parseInt(String.valueOf(arr[1].charAt(1))) > 5){
            dec = Integer.parseInt(String.valueOf(arr[1].charAt(0))) + 1;
        } else {
            dec = Integer.parseInt(String.valueOf(arr[1].charAt(0)));
        }

        return String.format("%d.%d", whole, dec);
    }

    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);

        double celsius = s.nextDouble();

        // Não liga pra isso, o mais importante ta ali em cima
        Arrays.asList(
            celsius + 273.15d, // Kelvin
            celsius * (9d/5d) + 32, // Farenheit
            (celsius + 273.15d) * (9d/5d), // Rankine
            celsius * (4d/5d), // Reamur
            celsius * (21d/40d) + 7.5d, // Romer
            (100 - celsius) * (3d/2d) // Deslile
        ).stream()
            .map(t -> System.out.printf("%s\n", format(t)))
            .collect(Collectors.toList());
    }
}