Example for String.format

import java.util.*;

public class replaceQuestionMarkwithValues {

       static String query = "select * from table where col1 = ?, col2= ?, col3=? ";

    

       public static void main(String[] args) {

         replaceQuestionMarkwithValues re = new replaceQuestionMarkwithValues();

         List list = new ArrayList();

         list.add("1");

         list.add("2");

         list.add("3");

         list.add("4");

     System.out.println("The Output Is " + extracted(re, list));

       }

private static String extracted(replaceQuestionMarkwithValues re, List list) {

     return re.formatQuery(query, list);

}

        public static String formatQuery(String query, List params){

         Object[] args=params.toArray();

         System.out.println("Total values present are " + args.length);

     return String.format(query.replaceAll("\\?", "%s"), args);

}

}

Result Is : 

--------------

Total values present are 4

The Output Is select * from table where col1 = 1, col2= 2, col3=3