質問編集履歴
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java
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@@ -24,6 +24,7 @@
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###該当のソースコード２
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```java
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Optional<String> result2 =data.stream().max((d1,d2) -> d1.length() - d2.length());
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+
result2.ifPresent(System.out::println);
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```
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###返り値
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