Need help removing strange characters from string
问题 Currently when I make a signature using java.security.signature, it passes back a string. I can't seem to use this string since there are special characters that can only be seen when i copy the string into notepad++, from there if I remove these special characters I can use the remains of the string in my program. In notepad they look like black boxes with the words ACK GS STX SI SUB ETB BS VT I don't really understand what they are so its hard to tell how to get ride of them. Is there a