Java 8 – Filter a null value from a Stream

Java 8 – Filter a null value from a Stream

package com.mkyong.java8;

import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class Java8Examples {

public static void main(String[] args) {

Stream<String> language = Stream.of("java", "python", "node", null, "ruby", null, "php");

//List<String> result = language.collect(Collectors.toList());

List<String> result = language.filter(x -> x!=null).collect(Collectors.toList());

result.forEach(System.out::println);

}
}

output

java
python
node
ruby
php

Alternatively, filter with Objects::nonNull

import java.util.List;

List<String> result = language.filter(Objects::nonNull).collect(Collectors.toList());

http://www.mkyong.com/java8/java-8-filter-a-null-value-from-a-stream/

转载于:https://www.cnblogs.com/shy1766IT/p/10020168.html