java - 如何匹配这两个值相同？

Question

class LetsComp {
  public static void main(String[] args) {

    int a = 10, b = 0010;

    System.out.println(a == b);  // this gives false, even if both values in actual are same

   }
}

Answer 1

在java中10和0010不一样。

0010 的八进制相当于 8(十进制)，而 10 已经是十进制格式。

来自JLS :

An octal numeral consists of an ASCII digit 0 followed by one or more of the ASCII digits 0 through 7 interspersed with underscores, and can represent a positive, zero, or negative integer.