Bitwise XOR Java length

I use Oracle Java 7.51 on Ubuntu 12.04 and try to do so

long a = 0x0000000080000001 ^ 0x4065DE839A6F89EEL;
System.out.println("result "+ Long.toHexString(a));

Output: result bf9a217c1a6f89ef

But I expect the result to be 4065de831a6f89ef, because the ^ operator is a bitwise XOR in Java What part of the Java specification did I read wrong?

Solution

An L is required at the end of the first integer text:

long a = 0x0000000080000001L ^ 0x4065DE839A6F89EEL;

Otherwise, it is an int literal, not a long (ignored leading zero) Then, ^ operator promotes the value of the first operation from 0x80000001 to long, but since the sign bit is set, the promotion result is 0xffffff8000001l