我的简单问题是为什么：
System.out.println(010|4);
打印“12”？我理解按位OR运算符,但为什么“010”等于8？这绝对不是恭维2的通知,那么如何解码这个数字呢？
解决方法
看看
Java Language Specification,Chapter 3.10.1 Integer Literals
An integer literal may be expressed in decimal (base 10),hexadecimal
(base 16),octal (base 8),or binary (base 2).[…]
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.
现在你应该明白为什么010是8.
