Java tutorial
//package com.java2s; public class Main { /** * Check if a character is allowed in a filename (if it is a valid input) * * @param currentChar the entered char * @return if it is allowed or not to be used in a filename */ private static boolean isFileCharAllowed(char currentChar) { boolean isCharAllowed = false; String reservedChars = "?:\"*|/\\<>"; if (reservedChars.indexOf(currentChar) == -1) { isCharAllowed = true; } return isCharAllowed; } }