java8-tutorial/src/com/winterbe/java8/Lambda1.java at master · lan13217/java8-tutorial · GitHub

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package com.winterbe.java8;

import java.util.Arrays;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

import java.util.Optional;

/**

* @author Benjamin Winterberg

public class Lambda1 {

public static void main(String[] args) {

List<String> names = Arrays.asList("peter", "anna", "mike", "xenia");

Collections.sort(names, new Comparator<String>() {

@Override

public int compare(String a, String b) {

return b.compareTo(a);

}

});

Collections.sort(names, (String a, String b) -> {

return b.compareTo(a);

});

Collections.sort(names, (String a, String b) -> b.compareTo(a));

Collections.sort(names, (a, b) -> b.compareTo(a));

System.out.println(names);

names.sort(Collections.reverseOrder());

System.out.println(names);

List<String> names2 = Arrays.asList("peter", null, "anna", "mike", "xenia");

names2.sort(Comparator.nullsLast(String::compareTo));

System.out.println(names2);

List<String> names3 = null;

Optional.ofNullable(names3).ifPresent(list -> list.sort(Comparator.naturalOrder()));

System.out.println(names3);

}

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