Here you can find the source of isPrintableAscii(int c)
public static boolean isPrintableAscii(int c)
//package com.java2s; public class Main { public static int PRINTABLE_ASCII_MIN = 0x20; public static int PRINTABLE_ASCII_MAX = 0x7E; public static boolean isPrintableAscii(int c) { return c >= PRINTABLE_ASCII_MIN && c <= PRINTABLE_ASCII_MAX; }/*from w ww.j a v a 2 s. com*/ }