java : MyString : if the words reversed is the same as original

MyString.java

package neo.lang;

import java.lang.String;
import static java.lang.System.out;

/**
 *
 * @author neojou
 */
public class MyString {

    String str;
    
    MyString(String s) {
        str = s;
    }
    
    public boolean isMirror() {        
        int num = str.length();
        for (int i=0; i<num/2; i++) {
            if (str.charAt(i) != str.charAt(num-1-i)) return false;
        }
        
        return true;
    } 
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        String[] words = {"RADAR", "WARTER START", "MILK KLIM", "RESERVERED", "IWI"};
        
        for (int i=0; i<words.length; i++) {
            out.print(words[i]);
            MyString ms = new MyString(words[i]);
            if ( ms.isMirror() ) {
                out.print(" : Mirror");
            }
            out.println(" ");
        }
    }
    
}