Here you can find the source of toDBC(String s)
public static String toDBC(String s)
//package com.java2s; //License from project: Apache License public class Main { public static String toDBC(String s) { if (isEmpty(s)) { return s; }/*from w w w. ja v a 2 s. c o m*/ char[] chars = s.toCharArray(); for (int i = 0, len = chars.length; i < len; i++) { if (chars[i] == 12288) { chars[i] = ' '; } else if (65281 <= chars[i] && chars[i] <= 65374) { chars[i] = (char) (chars[i] - 65248); } else { chars[i] = chars[i]; } } return new String(chars); } public static boolean isEmpty(CharSequence s) { return s == null || s.length() == 0; } public static int length(CharSequence s) { return s == null ? 0 : s.length(); } }