package emufog.util;

public class ConversionsUtils {

    public static String intervalToString(long start, long end) {
        double d = (double) (end - start) / 1000000;

        return d + "ms";
    }
}

@@ -1,202 +1,2407 @@
-package emufog.util;%0A%0Apublic class ConversionsUtils %7B%0A%0A    public static String intervalToString(long start, long end) %7B%0A        double d = (double) (end - start) / 1000000;%0A%0A        return d + %22ms%22
+/*%0A * MIT License%0A *%0A * Copyright (c) 2019 emufog contributors%0A *%0A * Permission is hereby granted, free of charge, to any person obtaining a copy%0A * of this software and associated documentation files (the %22Software%22), to deal%0A * in the Software without restriction, including without limitation the rights%0A * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell%0A * copies of the Software, and to permit persons to whom the Software is%0A * furnished to do so, subject to the following conditions:%0A *%0A * The above copyright notice and this permission notice shall be included in all%0A * copies or substantial portions of the Software.%0A *%0A * THE SOFTWARE IS PROVIDED %22AS IS%22, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR%0A * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,%0A * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE%0A * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER%0A * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,%0A * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE%0A * SOFTWARE.%0A */%0Apackage emufog.util;%0A%0Aimport java.util.concurrent.TimeUnit;%0A%0Apublic class ConversionsUtils %7B%0A%0A    /**%0A     * Converts an interval of start and endpoint to a string%0A     * representing the duration in the format e.g. '1h1min1s1ms'.%0A     *%0A     * @param start start point of the interval in ns%0A     * @param end   end point of the interval in ns%0A     * @return string representation of the interval to print%0A     */%0A    public static String intervalToString(long start, long end) %7B%0A        long duration = end - start;%0A        StringBuilder sb = new StringBuilder();%0A%0A        long hours = TimeUnit.HOURS.convert(duration, TimeUnit.NANOSECONDS);%0A        if (hours %3E 0) %7B%0A            sb.append(hours).append('h');%0A        %7D%0A%0A        long minutes = TimeUnit.MINUTES.convert(duration, TimeUnit.NANOSECONDS);%0A        if (minutes %3E 0) %7B%0A            sb.append(minutes).append(%22min%22);%0A        %7D%0A%0A        long seconds = TimeUnit.SECONDS.convert(duration, TimeUnit.NANOSECONDS);%0A        if (seconds %3E 0) %7B%0A            sb.append(seconds).append('s');%0A        %7D%0A%0A        long milliseconds = TimeUnit.MILLISECONDS.convert(duration, TimeUnit.NANOSECONDS);%0A        if (milliseconds %3E 0) %7B%0A            sb.append(milliseconds).append(%22ms%22);%0A        %7D%0A%0A        return sb.toString()
 ;%0A  

improve the interval to string conversion