Checking if all true and reset a Boolean[] array using one-liner lambda expression of Java 8

Question

Suppose I have a huge Boolean array flags:

Boolean[] flags = { true, false, true };    // 3 means "many"

I want to do two things on flags:

• check whether all the elements are true and return an indicator;
• reset all the elements to false.

Using lambda expression of Java 8, I can do them as follows:

indicator = Arrays.stream(flags).allMatch(flag -> flag);
Arrays.stream(flags).forEach(flag -> flag = false);
return indicator;

However this implementation scans flags twice. Since flags is huge, I don't want this. In addition, I do prefer the lambda way. Is there any way of implementing this checkIfAllTrueAndReset semantics with (one-liner) lambda expression which scans flags only once?

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Related but not the same: What is the most elegant way to check if all values in a boolean array are true?

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Note: I learn a lot from comments and answers. Thank you all!

1. Stream is cool, but it is not for this.
2. BitSet (and its bit-wisely atomic counterpart AtomicBitSet) is more suitable for this (so accepted as the answer; thank others).
3. Side-effects in map (Stream or generally functional programming) are discouraged.
4. Arrays.stream(flags).forEach(flag -> flag = false) (in my code) does not set anything!

Answer 1

Classic example for using the BitSet class:

This class implements a vector of bits that grows as needed. Each component of the bit set has a boolean value.

In complexity terms, BitSet uses ~1 bit for each boolean value, which is way better than using big array of Boolean objects.

Regarding checking of all bits are set or not (true or false), the API provides many useful methods - and they're really efficient.