Conocer/Ver codificación base de datos oracle

SELECT * FROM NLS_DATABASE_PARAMETERS;

Conversión entre UTF-8 e ISO java

String valueIso = new String("cár");
//String valueUTF = new String("l´´'és `ü+");
try {
String value = new String (valueIso.getBytes("UTF-8"), "ISO-8859-1");
System.out.print("iso: " + value + "\n");

//String value2 = new String (valueUTF.getBytes("ISO-8859-1"), "UTF-8");
//System.out.print("utf: " + value2);

} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}