进制转换

       //十进制转换为二进制

       int a = 17;

       //Integer.toBinaryString() is ok too, but it is hard to remember

       //String str = Integer.toBinaryString(a);

       String str = Integer.toString(a, 2);

       System.out.println(str);

      

       //二进制转换为十进制

       String ints = "1001110";

       int b = Integer.parseInt(ints, 2);

       System.out.println(b);