Java – why is “010” equal to 8?

• Java

My simple question is why:

System.out.println(010|4);

Print "12"? I understand the bitwise OR operator, but why is "010" equal to 8? This is definitely not a compliment 2 notice, so how to decode this number?

Solution

Take a look at the Java language specification, chapter 3.10 1 Integer Literals

Now you should understand why 010 is 8

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