比较版本号

/*
 * Solution approach using Java Streams:
 * 1. Split both version strings by '.' to get individual revision numbers.
 * 2. Convert these revision numbers to integers, treating missing numbers as 0.
 * 3. Use IntStream to compare the revisions from both versions.
 * 4. Return the appropriate result based on the comparison.
 */
import java.util.stream.IntStream;
public class CompareVersionNumbersStream {
    public int compareVersion(String version1, String version2) {
        int[] levels1 = Stream.of(version1.split("\\.")).mapToInt(Integer::parseInt).toArray();
        int[] levels2 = Stream.of(version2.split("\\.")).mapToInt(Integer::parseInt).toArray();
        int length = Math.max(levels1.length, levels2.length);
        return IntStream.range(0, length).map(i -> Integer.compare(
            i < levels1.length ? levels1[i] : 0,
            i < levels2.length ? levels2[i] : 0
        )).filter(result -> result != 0).findFirst().orElse(0);
    }
}