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java_upgrade/src/main/java/sorting/SortGolfers.java at master · amhtech/java_upgrade · GitHub

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package sorting;

import java.util.Arrays;

import java.util.Comparator;

import java.util.List;

import java.util.Map;

import java.util.stream.Collectors;

public class SortGolfers {

private final List<Golfer> golfers = Arrays.asList(

new Golfer("Jack", "Nicklaus", 68),

new Golfer("Tiger", "Woods", 70),

new Golfer("Tom", "Watson", 70),

new Golfer("Ty", "Webb", 68),

new Golfer("Bubba", "Watson", 70)

);

// default sort is by score

public void defaultSort() {

golfers.stream()

.sorted()

.forEach(System.out::println);

}

// sort by score, then equal scores by last name

public void sortByScoreThenLast() {

golfers.stream()

.sorted(Comparator.comparingInt(Golfer::getScore)

.thenComparing(Golfer::getLast))

.forEach(System.out::println);

}

// sort by score, then by last, then by first

public void sortByScoreThenLastThenFirst() {

golfers.stream()

.sorted(Comparator.comparingInt(Golfer::getScore)

.thenComparing(Golfer::getLast)

.thenComparing(Golfer::getFirst))

.forEach(System.out::println);

}

public void partitionByScore() {

Map<Boolean, List<Golfer>> map = golfers.stream()

.collect(Collectors.partitioningBy(

golfer -> golfer.getScore() < 70));

map.forEach((k,v) -> {

System.out.println(k);

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

});

}

public static void main(String[] args) {

SortGolfers sg = new SortGolfers();

// sg.defaultSort();

// sg.sortByScoreThenLast();

sg.sortByScoreThenLastThenFirst();

// sg.partitionByScore();

}

}

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