Java, tidsomvandling

public class Uppgift6 {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		System.out.println("Ange antalet timmar:");
		int T = in.nextInt();
		System.out.println("Ange antalet minuter:");
		int M = in.nextInt();
		System.out.println("Ange antalet sekunder");
		double S = in.nextInt();
		double SummaS = (T*3600) + (M*60) + (S); // Sekunderna
		double SummaM = SummaS*60;
		double SummaT = SummaM*60;
		System.out.println("Tidsomvandligen ger: ");
		System.out.println(SummaT + "Timmar " + SummaM + "Minuter " + SummaS+"Sekunder");