摘要： int i = 123;String binStr = Integer.toBinaryString(i);String otcStr = Integer.toOctalString(i);String hexStr = Integer.toHexString(i);String str = Integer.toBinaryString(i);String reverseStr = new StringBuilder(str).reverse().toString();if (reverseStr.charAt(0) == '1') { System.out.println(& 阅读全文