回答編集履歴
2
nullsLastの使い方を間違えた
test
CHANGED
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@@ -8,7 +8,7 @@
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8
8
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9
9
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private List<Method> getMethods(Class<?> cls) {
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10
10
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11
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-
return getMethods(cls, comparing(
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11
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+
return getMethods(cls, comparing(
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12
12
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13
13
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m -> Optional.ofNullable(m.getDeclaredAnnotation(Name.class))
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14
14
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@@ -18,7 +18,7 @@
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18
18
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19
19
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.orElse(null)
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20
20
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21
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-
)));
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21
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+
, nullsLast(naturalOrder())));
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22
22
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23
23
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}
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24
24
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1
コード
test
CHANGED
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@@ -1 +1,39 @@
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1
1
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引数にComparatorを取るようにして、そこに順番の定義を渡すようにすればいい。
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2
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+
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3
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+
省略時はデフォルトのComparatorを使うことにすると
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4
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+
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5
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+
```java
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6
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+
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7
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+
// import static java.util.Comparator.*;
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8
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+
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9
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+
private List<Method> getMethods(Class<?> cls) {
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10
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+
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11
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+
return getMethods(cls, comparing(nullsLast(
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12
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+
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13
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+
m -> Optional.ofNullable(m.getDeclaredAnnotation(Name.class))
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14
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+
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15
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+
.map(Name::value)
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16
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+
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17
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.filter(s -> s.length() != 0)
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18
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+
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19
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.orElse(null)
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20
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+
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21
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+
)));
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22
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+
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23
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}
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24
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+
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25
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+
private List<Method> getMethods(Class<?> cls, Comparator<? super Method> comparator) {
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26
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+
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27
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+
return Arrays.stream(cls.getDeclaredMethods())
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28
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+
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29
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+
.filter(method -> method.getName().startsWith("get"))
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30
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+
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31
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+
.filter(method -> method.getDeclaredAnnotation(Item.class) == null)
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32
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+
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33
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+
.sorted(comparator)
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34
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+
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35
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+
.collect(Collectors.toList());
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36
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+
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37
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+
}
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38
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+
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39
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+
```
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