JAVA - make code short and clean

Try to build small functions (utilities) to help shorten the code.
And also, avoid redundant work.

package com.XXX.XXX.XXX;
import com.XXX.XXX.XXX.utilities.NumericUtilities;

import org.apache.commons.lang3.StringUtils;

import org.apache.commons.lang3.math.NumberUtils;
import java.util.Arrays;

public class ChokeSizeReformatting {
    private static final String INVALID_CHARACTER="(TH)|(THS)|(in)|[`]|[']|[-]|[\"]|\\s";    

    private static final String[] IDENTIFIED_STRING={"FUL", "NONE", "OPEN","NO CHOKE","FO"};    

    private static final String[] SPECIAL_CASE  = {".", "ADJ","\\"};    

    private static final String[] SPECIAL_CASE_REPLACEMENT  = {"0.", "64","/"};
 //fist step: to do basic cleaning of the data, 

//and also indicate if the string is number or not.    

    public static double cleanChokeSizeString(String rawChokeSize) {

        String cleanedRawString = rawChokeSize.replaceAll(INVALID_CHARACTER,"");
        String modifiedString = 

        StringUtils.replaceEach(cleanedRawString,SPECIAL_CASE, SPECIAL_CASE_REPLACEMENT);
        //logic from LA, TX, OK, CO completion        

       if (Arrays.stream(IDENTIFIED_STRING).anyMatch(modifiedString::contains)) {

            modifiedString = "1";        } 

           else if (NumericUtilities.isDivisible(modifiedString)) {

            modifiedString = NumericUtilities.fractionToDecimal(modifiedString);        

       } else if (!NumberUtils.isNumber(modifiedString)) {

            modifiedString = "0";        }

        return Double.parseDouble(modifiedString);    }
}

package com.xxxx.xxxx.xxxx.utilities;
import org.apache.commons.lang3.math.NumberUtils;

public class NumericUtilities {

    //check if the data extracted from string can be divided    
       public static boolean isDivisible(String str){
        int charIndex = (str.contains("/")? str.indexOf("/"): 0);
        return (str.contains("/") &&
                NumberUtils.isNumber(str.substring(0,charIndex)) &&
                NumberUtils.isNumber(str.substring(charIndex + 1)) &&
                !str.substring(charIndex + 1).equals("0")) ;    }

    //if data is fraction, then parse to decimal    
        public static String fractionToDecimal(String str) {
           int charIndex = str.indexOf("/");        
           double numerator = Double.parseDouble(str.substring(0, charIndex));        
           double denominator = Double.parseDouble(str.substring(charIndex + 1));
           return String.valueOf(numerator / denominator);    }
}