回答編集履歴
3
Scoreクラスも追加
answer
CHANGED
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@@ -25,4 +25,28 @@
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25
25
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score.forEach(s -> System.out.printf("%s : Math : %d : English : %d\n", s.getName(), s.getMath(), s.getEnglish()));
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26
26
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}
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27
27
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}
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28
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+
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29
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+
class Score {
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30
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+
private String name;
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31
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+
private int math;
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32
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+
private int english;
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33
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+
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34
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+
public Score(String name, int math, int english) {
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35
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+
this.name = name;
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36
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+
this.math = math;
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37
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+
this.english = english;
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38
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+
}
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39
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+
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40
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+
public String getName() {
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41
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return name;
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42
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+
}
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43
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+
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44
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+
public int getMath() {
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45
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return math;
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46
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}
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47
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+
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48
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+
public int getEnglish() {
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49
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return english;
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50
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+
}
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51
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+
}
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28
52
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```
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2
全部記述するように変更
answer
CHANGED
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@@ -1,25 +1,28 @@
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1
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-
以下のインポートを追加しています。
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2
1
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```Java
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3
2
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import static java.util.Comparator.*;
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4
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-
```
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5
3
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6
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-
```Java
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7
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-
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4
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+
import java.util.ArrayList;
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8
5
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6
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+
public class SortScoreComparable {
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9
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-
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7
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+
public static void main(String[] args) {
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10
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-
score.add(new Score("jiro", 42, 54));
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11
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-
score.add(new Score("sabu", 42, 47));
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12
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score.add(new Score("siro", 57, 97));
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13
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-
score.add(new Score("goro", 87, 40));
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14
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-
score.add(new Score("roku", 99, 99));
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15
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-
score
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8
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+
ArrayList<Score> score = new ArrayList<Score>();
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16
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-
score.add(new Score("hati", 42, 54));
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17
9
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18
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-
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10
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+
score.add(new Score("taro", 12, 97));
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11
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+
score.add(new Score("jiro", 42, 54));
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12
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+
score.add(new Score("sabu", 42, 47));
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13
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+
score.add(new Score("siro", 57, 97));
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14
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+
score.add(new Score("goro", 87, 40));
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15
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+
score.add(new Score("roku", 99, 99));
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16
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+
score.add(new Score("nana", 14, 23));
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19
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-
score.
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17
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+
score.add(new Score("hati", 42, 54));
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20
18
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19
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+
System.out.println("ソート前");
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21
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-
score.
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20
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+
score.forEach(s -> System.out.printf("%s : Math : %d : English : %d\n", s.getName(), s.getMath(), s.getEnglish()));
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22
21
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22
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+
score.sort(comparing(Score::getMath).thenComparing(Score::getEnglish).reversed());
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23
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+
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23
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-
System.out.println("ソート後");
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24
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+
System.out.println("ソート後");
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24
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-
score.forEach(s -> System.out.printf("%s : Math : %d : English : %d\n", s.getName(), s.getMath(), s.getEnglish()));
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25
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+
score.forEach(s -> System.out.printf("%s : Math : %d : English : %d\n", s.getName(), s.getMath(), s.getEnglish()));
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26
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+
}
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27
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+
}
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25
28
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```
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1
追記
answer
CHANGED
|
@@ -1,4 +1,9 @@
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1
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+
以下のインポートを追加しています。
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1
2
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```Java
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3
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+
import static java.util.Comparator.*;
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4
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+
```
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5
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+
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6
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+
```Java
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2
7
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ArrayList<Score> score = new ArrayList<Score>();
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3
8
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4
9
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score.add(new Score("taro", 12, 97));
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