public static void main(String[] args) throws Exception 
    { 
        String a = "1234567";
        char b[] = a.toCharArray();
        for(int i=0;i<b.length;i++)
        {
            String c = String.valueOf(b[i]);
            int d = Integer.parseInt(c);
            System.out.print(d);
        }
    }

 输出结果 1234567