Conversor de tempo em Java

package br.com.mileniospvp.types;

import java.util.concurrent.TimeUnit;

public class TimeProfile {

    private final long milliseconds;
    private int seconds;
    private int minutes;
    private int hours;
    private int days;
    private int weeks;
    private int months;
    private int years;
    public static String[] formats = new String[] { "ms", "seconds", "minutes", "hours", "days", "weeks", "months", "years" };

    public TimeProfile(long milliseconds) {
        this.milliseconds = milliseconds;

        this.seconds = (int) TimeUnit.MILLISECONDS.toSeconds(this.milliseconds);
        this.minutes = (int) TimeUnit.MILLISECONDS.toMinutes(this.milliseconds);
        this.hours = (int) TimeUnit.MILLISECONDS.toHours(this.milliseconds);
        this.days = (int) TimeUnit.MILLISECONDS.toDays(this.milliseconds);

        this.years = this.days / 365;
        this.days = this.days % 365;
        this.months = this.days / 30;
        this.days = this.days % 30;
        this.weeks = this.days / 7;
        this.days = this.days % 7;
    }

    public long getMilliseconds() {
        return milliseconds;
    }

    public int getSeconds() {
        return seconds;
    }

    public int getMinutes() {
        return minutes;
    }

    public int getHours() {
        return hours;
    }

    public int getDays() {
        return days;
    }

    public int getWeeks() {
        return weeks;
    }

    public int getMonths() {
        return months;
    }

    public int getYears() {
        return years;
    }

    public void setSeconds(int seconds) {
        this.seconds = seconds;
    }

    public void setMinutes(int minutes) {
        this.minutes = minutes;
    }

    public void setHours(int hours) {
        this.hours = hours;
    }

    public void setDays(int days) {
        this.days = days;
    }

    public void setWeeks(int weeks) {
        this.weeks = weeks;
    }

    public void setMonths(int months) {
        this.months = months;
    }

    public void setYears(int years) {
        this.years = years;
    }

    public String formatToMilliseconds() {
        return milliseconds + " " + formated("milliseconds");
    }

    public String formatToSeconds() {
        return seconds + " " + formated("seconds");
    }

    public String formatToMinutes() {
        return minutes + " " + formated("minutes");
    }

    public String formatToHours() {
        return hours + " " + formated("hours");
    }

    public String formatToDays() {
        return days + " " + formated("days");
    }

    public String formatToWeeks() {
        return weeks + " " + formated("weeks");
    }

    public String formatToMonths() {
        return months + " " + formated("months");
    }

    public String formatToYears() {
        return years + " " + formated("years");
    }

    public String format() {
        return formatToYears() +
                " " + formatToMonths() +
                " " + formatToWeeks() +
                " " + formatToDays() +
                " " + formatToHours() +
                " " + formatToMinutes() +
                " " + formatToSeconds() +
                " (" + formatToMilliseconds() + ")";
    }

    private String formated(String unit) {
        if(unit.equalsIgnoreCase("milliseconds")) {
            return formats[0];
        } else if(unit.equalsIgnoreCase("seconds")) {
            return formats[1];
        } else if(unit.equalsIgnoreCase("minutes")) {
            return formats[2];
        } else if(unit.equalsIgnoreCase("hours")) {
            return formats[3];
        } else if(unit.equalsIgnoreCase("days")) {
            return formats[4];
        } else if(unit.equalsIgnoreCase("weeks")) {
            return formats[5];
        } else if(unit.equalsIgnoreCase("months")) {
            return formats[6];
        } else if(unit.equalsIgnoreCase("years")) {
            return formats[7];
        }

        return formats[0];
    }

    public String toString() {
        return "TimeProfile [milliseconds=" + this.milliseconds + ", seconds=" + this.seconds + ", minutes=" + this.minutes + ", hours=" + this.hours + ", days=" + this.days + ", weeks=" + this.weeks + ", months=" + this.months + ", years=" + this.years + "]";
    }
}