回答編集履歴
2
処理改善
answer
CHANGED
|
@@ -7,6 +7,7 @@
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|
|
7
7
|
|
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8
8
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public List<String> getUniqueList(List<String> targetList) {
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|
9
9
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return targetList.stream()
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|
10
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+
.distinct()
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|
10
11
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.filter(val -> Collections.frequency(targetList, val) == 1)
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|
11
12
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.collect(Collectors.toList());
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12
13
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}
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1
importを追加
answer
CHANGED
|
@@ -1,5 +1,10 @@
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|
|
1
1
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シンプルな記述だが、あまり効率は良くないかもしれない。
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2
2
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```Java
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|
3
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+
import java.util.Arrays;
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|
4
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+
import java.util.Collections;
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|
5
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+
import java.util.List;
|
|
6
|
+
import java.util.stream.Collectors;
|
|
7
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+
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|
3
8
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public List<String> getUniqueList(List<String> targetList) {
|
|
4
9
|
return targetList.stream()
|
|
5
10
|
.filter(val -> Collections.frequency(targetList, val) == 1)
|