public static boolean checkNum(int);
    descriptor: (I)Z
    flags: ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=3, args_size=1
         0: iload_0
         1: iconst_3
         2: ishl
         3: istore_1
         4: iload_0
         5: ldc           #2                  // int 525024598
         7: ixor
         8: istore_2
         9: iload_1
        10: iload_2
        11: ixor
        12: ldc           #3                  // int -889275714
        14: if_icmpne     21
        17: iconst_1
        18: goto          22
        21: iconst_0
        22: ireturn
      LineNumberTable:
        line 3: 0
        line 4: 4
        line 5: 9
      StackMapTable: number_of_entries = 2
        frame_type = 253 /* append */
          offset_delta = 21
          locals = [ int, int ]
        frame_type = 64 /* same_locals_1_stack_item */
          stack = [ int ]