package  tests;

 import  java.lang.reflect.Field;
 import  java.lang.reflect.Modifier;

/**
 * This application demonstrates how to modify java.lang.String object
 * through reflection API.
 *
 * @version 1.0
 * @author Eugene Matyushkin
 */
 public   class  StringReverseTest {

    /**
     * final static string that should be modified.
     */
     public   static   final  String testString = "abcde";

     public   static   void  main(String[] args) {
         try {
            System.out.println("Initial static final string:  "+testString);
            Field[] fields = testString.getClass().getDeclaredFields();
            Field value =  null ;
             for ( int  i= 0 ; i<fields.length; i++){
                Field field = fields[i];
                 if  (field.getType().equals( char []. class )){
                    value = field;
                     break ;
                }
            }
             if  (value ==  null ){
                System.err.println("value wasn't found!");
                 return ;
            }
            value.setAccessible(true);  // 1.
             char [] charValue = ( char [])value.get(testString);
             for ( int  i= 0 ; i<charValue.length/ 2 ; i++ ){
                 char  tmp=charValue[i];
                charValue[i] = charValue[charValue.length- 1 -i];
                charValue[charValue.length- 1 -i] = tmp;
            }
            value.set(testString, charValue);
            System.out.print("Reversed static final string: ");
            System.out.println(testString);
        } catch  (Throwable th){
            System.err.println("Exception: "+th);
            th.printStackTrace();
        }
    }
}