Resolution to Format

Resolution.java

// Another way to handle the format related stuff

public class Resolution {

    public static final Resolution FULL_HD = new Resolution(1920, 1080, "Full HD");
    public static final Resolution HALF_HD = new Resolution(1280,  720, "Half HD");
    public static final Resolution PAL     = new Resolution( 720,  576, "PAL"); // Maybe 702?
    public static final Resolution PALplus = new Resolution(1024,  576, "PALplus");
    private static final RESOLUTIONS[] resolutions = new Resolution[] { FULL_HD, HALF_HD, PAL, PALplus };

    public static final DecimalFormat DEFAULT_FORMAT = new DecimalFormat("#0.##");

    public final int resX;
    public final int resY;
    public final String description;
    public final String format;

    private static String generateDescription(final int resX, final int resY) {
        for (Resolution r : RESOLUTIONS) {
            if (r.resX == resX && r.resY == resY) {
                return r.description;
            }
        }
        return "";
    }

    public Resolution(final int resX, final int resY) {
        this(resX, resY, generateDescription(resX, resY));
    }

    private Resolution(final int resX, final int resY, final String description) {
        this.resX = resX;
        this.resY = resY;
        this.description = description;
        final double universalFormat = this.resX / (double) this.resY;
        // 16:9 == 1.(7)
        if (universalFormat > 1.77 && universalFormat < 1.7777778) {
            this.format = "16:9";
        // 16:10 == 1.6
        } else if (universalFormat > 1.599999 && universalFormat < 1.6000001) {
            this.format = "16:10";
        // 4:3 == 1.(3)
        } else if (universalFormat > 1.33 && universalFormat < 1.3333334) {
            this.format = "4:3";
        } else {
            this.format = DEFAULT_FORMAT.format(universalFormat) + ":1";
        }
    }

    public String getFormat() {
        return this.format;
    }

    public String toString() {
        final String minimal = this.resX + "x" + this.resY;
        if (this.description != null && !this.description.isEmpty()) {
            return minimal + " (" + this.description + ")";
        }
        return minimal;
    }
}

WithoutClass.java

public static final DecimalFormat DEFAULT_FORMAT = new DecimalFormat("#0.##");

public static String getFormatFromResolution(int resX, int resY) {
    final double universalFormat = resX / (double) resY;
    // 16:9 == 1.(7)
    if (universalFormat > 1.77 && universalFormat < 1.7777778) {
        return "16:9";
    // 16:10 == 1.6
    } else if (universalFormat > 1.599999 && universalFormat < 1.6000001) {
        return "16:10";
    // 4:3 == 1.(3)
    } else if (universalFormat > 1.33 && universalFormat < 1.3333334) {
        return "4:3";
    } else {
        return DEFAULT_FORMAT.format(universalFormat) + ":1";
    }
}