将整数转换为对应的8位二进制字符串

 1 /**
 2 * 将整数转换为对应的8位二进制字符串
 3 */
 4 public static String binaryString(int num) {
 5     StringBuilder result = new StringBuilder();
 6     int flag = 1 << 7;
 7     for (int i = 0; i < 8; i++) {
 8         int val = (flag & num) == 0 ? 0 : 1;
 9         result.append(val);
10         num <<= 1;
11     }
12     return result.toString();
13 }