JAVA 半角全角相互转换

/**
     * 半角转全角
     * @param input String.
     * @return 全角字符串.
     */
    public static String ToSBC(String input) {
             char c[] = input.toCharArray();
             for (int i = 0; i < c.length; i++) {
               if (c[i] == \' \') {
                 c[i] = \'\\u3000\';
               } else if (c[i] < \'\\177\') {
                 c[i] = (char) (c[i] + 65248);

               }
             }
             return new String(c);
    }

    /**
     * 全角转半角
     * @param input String.
     * @return 半角字符串
     */
    public static String ToDBC(String input) {
        

             char c[] = input.toCharArray();
             for (int i = 0; i < c.length; i++) {
               if (c[i] == \'\\u3000\') {
                 c[i] = \' \';
               } else if (c[i] > \'\\uFF00\' && c[i] < \'\\uFF5F\') {
                 c[i] = (char) (c[i] - 65248);

               }
             }
        String returnString = new String(c);
        
             return returnString;
    }