[FIXED] Change display values for JavaFX Axis

Issue

NumberAxis and CategoryAxis are used for plotting my AreaChart. />

I would like to know how can I change display values for both axis since I need to:

• display humanReadableByteCount (KB, MB, GB) instead of bytes representation for the Y axis
• display the hour:minute:second only for thee X axis

I was unable to find any information on how to modify the display values in the doc: https://docs.oracle.com/javase/8/javafx/api/javafx/scene/chart/NumberAxis.html

Solution

I was able to solve this by implementing setTickLabelFormatter which overrides toString:

    ratesAxis.setTickLabelFormatter(new StringConverter<>() {
        @Override
        public String toString(Number t) {
            return String.valueOf(ReadFile.humanReadableByteCountSI(t));
        }

        @Override
        public Number fromString(String string) {
            return 1;
        }
    });

From another class:

static String humanReadableByteCountSI(Number bytesString) {
    int bytes = (int) bytesString.intValue();
    if (-1000 < bytes && bytes < 1000) {
        return bytes + " B";
    }
    CharacterIterator ci = new StringCharacterIterator("kMGTPE");
    while (bytes <= -999_950 || bytes >= 999_950) {
        bytes /= 1000;
        ci.next();
    }
    return String.format("%.1f %cB", bytes / 1000.0, ci.current());
}

Result:

Answered By - feedthemachine
Answer Checked By - David Marino (JavaFixing Volunteer)