Java11 - Not 谓词
Java11 向 Predicate 接口引入了新方法 not() 来否定现有谓词,类似于 negate 方法。
考虑以下示例 −
ApiTester.java
import java.util.Arrays; import java.util.List; import java.util.function.Predicate; import java.util.stream.Collectors; public class APITester { public static void main(String[] args) { List<String> tutorialsList = Arrays.asList("Java", "\n", "HTML", " "); List<String> tutorials = tutorialsList.stream() .filter(Predicate.not(String::isBlank)) .collect(Collectors.toList()); tutorials.forEach(tutorial -> System.out.println(tutorial)); } }
输出
Java HTML