将找到的值乘以 2

/*
 * This solution uses Java Streams to handle the array operations.
 * We create a Set from the array and use a lambda to double 'original' until it is not found in the set.
 */
import java.util.Arrays;
import java.util.Set;
import java.util.stream.Collectors;

public int findFinalValueStream(int[] nums, int original) {
    // Convert the array to a Set
    Set<Integer> numSet = Arrays.stream(nums).boxed().collect(Collectors.toSet());
    // Use a while loop with the set's contains method
    while (numSet.contains(original)) {
        original *= 2;
    }
    // Return the final value of 'original'
    return original;
}