If you already know what is Unicode and you are sure that you know that you want to convert it to 7-bit ASCII and of the downside that it has, you can skip the chit-chat and jump to JUnidecode ...

PlainText is a Java 1.4 graphical (GUI) application to convert Unicode characters to plain text characters, for example, to convert left and right quotation marks into plain quotes for web pages.

If you are running Java through your terminal or command line without a separate library of graphical user interface components, your "system.out.println()" method may not use Unicode by default.