如何在 Java 中过滤非空值?
假设我们的 List 如下,其中包含字符串元素
List<String> leagues = Arrays.asList("BBL", "IPL", "MLB", "FPL","NBA", "NFL");
现在,创建一个流并过滤以特定字母结尾的元素
Stream<String> stream = leagues.stream().filter(leagueName -> leagueName.endsWith("L"));
现在,对非空值使用 Objects::nonnull
List<String> list = stream.filter(Objects::nonNull).collect(Collectors.toList());
以下是一个在 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
League names ending with L = [BBL, IPL, FPL, NFL]
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