encoding - Display japanese characters in java -

i reading string oracle db , trying print standard output, printing different string see after retrieved it

 package project1;  public class testjapchar {     public testjapchar() {         super();     }   public static void main(string[] argv){          string str = "新人研修交通費　";         system.out.println("original string : " + str);                           }  

}

the result of execution : *original string : 新人研修交通費　 *

i running script in jdeveloper , my environment encoding set utf-8.

upd. compiled code -encoding option "utf-8", output : original string : 7/31????????