add even more comparator stuff · stevencoding/java8-tutorial@e68ae18 · GitHub

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winterbe

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add even more comparator stuff

1 parent 1bb8e83 commit e68ae18
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  • Lambda1.java

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‎src/com/winterbe/java8/Lambda1.java‎

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Original file line number	Diff line number	Diff line change
@@ -4,6 +4,8 @@
4	4	import java.util.Collections;
5	5	import java.util.Comparator;
6	6	import java.util.List;
	7	+ import java.util.Objects;
	8	+ import java.util.Optional;
7	9
8	10	/**
9	11	* @author Benjamin Winterberg
@@ -37,6 +39,14 @@ public int compare(String a, String b) {
37	39	List<String> names2 = Arrays.asList("peter", null, "anna", "mike", "xenia");
38	40	names2.sort(Comparator.nullsLast(String::compareTo));
39	41	System.out.println(names2);
	42	+
	43	+ List<String> names3 = null;
	44	+
	45	+ Optional.ofNullable(names3).ifPresent(list -> list.sort(Comparator.naturalOrder()));
	46	+
	47	+ System.out.println(names3);
	48	+
	49	+ Objects.nonNull(names3);
40	50	}
41	51
42	52	}

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