如何在Java中过滤非空值？
假设以下是带有字符串元素的列表：
List<String> leagues = Arrays.asList("BBL", "IPL", "MLB", "FPL","NBA", "NFL");现在，创建一个以特定字母结尾的流和过滤器元素：
Stream<String> stream = leagues.stream().filter(leagueName -> leagueName.endsWith("L"));现在，将Objects::nonnull用作非null值：
List<String> list = stream.filter(Objects::nonNull).collect(Collectors.toList());
以下是在Java中过滤非空值的示例：
示例
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class Demo {
public static void main(String[] args) {
List<String> leagues = Arrays.asList("BBL", "IPL", "MLB", "FPL","NBA", "NFL");
Stream<String> stream = leagues.stream().filter(leagueName -> leagueName.endsWith("L"));
List<String> list = stream.filter(Objects::nonNull).collect(Collectors.toList());
System.out.println("League names ending with L = "+list);
}
}输出结果
League names ending with L = [BBL, IPL, FPL, NFL]