Binary translation or operations with bitwise shifts?

Question

Java

I get an array, for example {1, 3, 0, -57, 0, 0, 79, 11}
where -57 is what engines are on.
if we translate -57 into binary code "0xC7 = 11000111" I can find out what is enabled now 1, 2, 6, 7 and 8 engine
It seems like something like this, how can I check in the code to find out what is enabled now, that is,
specify engine number 5 look at bit 5 which is now = 0
and display.
That is, the feeling that it should be something like this
-57 << 5
and the answer will be 0
Who can show how to correctly write such a problem with the number -57, because I haven’t reached this topic yet, but I’m only learning the language?

Answer 1

First you need to clearly formulate the problem so that others can understand it. If you need to check if the nth bit in a number is set, it's done like this:if (x & (1<<n)){что-то там}