– Java processing null

– Start
When processing a collection, if there is a null element, it will result in a null pointer exception.

package shangbo.functional.demo17;

import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Objects;

public class App {
	public static void main(String[] args) {
		List<Integer> numbers = new ArrayList<>();
		numbers.add(1);
		numbers.add(null);
		numbers.add(2);

		// filter null
		Integer max = numbers.stream().filter(Objects::nonNull).max(Comparator.comparingInt(n -> n)).orElse(null);
		System.out.println(max);
	}
}

– See more:Java functional programming
– Description: Reprint, please indicate the source
– Last Updated on 2019-06-02
– Written by ShangBo on 2019-06-02
– End

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