Warnings from last compilation.

Hi All,
The program correctly sorts the items in the String array.


Note: C:\..\SortObjects.java uses unchecked or unsafe operations.
Note: Recompile with -XIint.unchecked for details <<<<

What is the meaning of these reported errors?

Your help is appreciated.

bH

import java.util.*;

public class SortObjects
{
     public static void main(String s[])
     {
        String t[] = { "115R", "1125R", "147C", "37R", "57R",
"37C" }; // This is to simulate the user input

        // The input is a String array. Make that an ArrayList:
        List inputList = new ArrayList(Arrays.asList(t)); //
replace "t" by "s" for using the command line arguments

        List l = sort(inputList);

        System.out.println("\nStrings sorted List ...");
        for(int i = 0; i < l.size(); i++)
            System.out.println((String)l.get(i));
    }

    public static List sort(List list) {
          Collections.sort(list, new Comparator() {

            public int compare(Object o1, Object o2) {
                 String s1 = (String)o1;
                 String s2 = (String)o2;

                 String integer1[] = s1.split("[^0-9]"); //
<<<<< changed
                 String integer2[] = s2.split("[^0-9]"); //
<<<<< changed
                 String chars1[] = s1.split("[0-9]+"); //
<<<<< changed
                 String chars2[] = s2.split("[0-9]+"); //
<<<<< changed

                 Integer i1 = new
Integer( Integer.parseInt(integer1[0]) );
                 Integer i2 = new
Integer( Integer.parseInt(integer2[0]) );

                 if (i1.equals(i2))
                    return chars1[1].compareTo(chars2[1]);
                  else
                     return i1.compareTo(i2);
            }
        });
        return list;
    }
}