RegexUtils.java

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexUtils {

    //private static final String DISTANCE_PATTERN = "(?i)[0-9]{1,2}\\s??(?:mi|mile|miles|km)\\b";
    private static final String DISTANCE_PATTERN = "(?i)((?:\\d+)?\\.?\\d+)\\s??(?:mi|mile|miles|km)\\b";
    private static final String DISTANCE_UNIT_PATTERN = "(?i)(?:mi|mile|miles|km)\\b";
    private static final String TIME_PATTERN = "(?i)[0-9]{1,2}\\s??(?:min|hr)";
    private static final String TIME_UNIT_PATTERN = "(?i)(?:min|hr)";
    private static final String FLOAT_NUMBER_PATTERN = "(?:\\d+)\\.\\d+\\b";

    private static RegexUtils instance;

    public static RegexUtils getInstance() {
        if (instance == null) {
            instance = new RegexUtils();
        }
        return instance;
    }

    public float getFirstNumberFromString(String data) {
        Pattern pattern = Pattern.compile("(-?(?:\\d+)?\\.?\\d+)");
        Matcher matcher = pattern.matcher(data);
        if (matcher.find()) {
            return Float.parseFloat(matcher.group());
        }
        return 0;
    }

    public String getFirstMatchingTimeData(String data) {
        Pattern pattern = Pattern.compile(TIME_PATTERN);
        Matcher matcher = pattern.matcher(data);
        if (matcher.find()) {
            return matcher.group().replaceAll(TIME_UNIT_PATTERN, "");
        }
        return "0";
    }

    public String getFirstMatchingDistanceData(String data) {
        Pattern pattern = Pattern.compile(DISTANCE_PATTERN);
        Matcher matcher = pattern.matcher(data);
        if (matcher.find()) {
            return matcher.group().replaceAll(DISTANCE_UNIT_PATTERN, "");
        }
        return "0";
    }

    public float getFirstMatchingRatingExceptTimeAndDistance(String data) {
        data = data.replaceAll(DISTANCE_PATTERN, "");
        data = data.replaceAll(TIME_PATTERN, "");
        Pattern pattern = Pattern.compile(FLOAT_NUMBER_PATTERN);
        Matcher matcher = pattern.matcher(data);
        while (matcher.find()) {
            Float val = Float.parseFloat(matcher.group());
            if (val >= 0 && val <= 5) {
                return val;
            }
        }
        return 0;
    }

}