Java - removing strange characters from a String

Question

How do I remove strange and unwanted Unicode characters (such as a black diamond with question mark) from a String?

Updated:

Please tell me the Unicode chara

Answer 1

same happened with me when i was converting clob to string using getAsciiStream.

efficiently solved it using

public String getstringfromclob(Clob cl)
{
    StringWriter write = new StringWriter();
    try{
        Reader read  = cl.getCharacterStream();     
    int c = -1;
    while ((c = read.read()) != -1)
    {
        write.write(c);
    }
    write.flush();
    }catch(Exception ec)
    {
        ec.printStackTrace();
    }
    return write.toString();

}