title: Convert from unrecognised character to normal form
body: <p>I have a error with my file. That is, all the characters are like <code>"GiÃ¡Â»âºi tÃÂ­nh".</code> I want to use Java to write a program that convert those characters to normal ones. I have tried to convert them to bytes and then convert again to String but it remained the same. </p>