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Update java新特性总结.md

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docs/java/new-features/java新特性总结.md
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@ -60,7 +60,7 @@ jshell 是 Java 9 新增的一个实用工具。为 Java 提供了类似于 Pyth
```java ```java
List.of("Java", "C++"); List.of("Java", "C++");
Set.of("Java", "C++"); Set.of("Java", "C++");
Map.of("Java", 1, "C++", 2)`; Map.of("Java", 1, "C++", 2);
``` ```
使用 `of()` 创建的集合为不可变集合，不能进行添加、删除、替换、 排序等操作，不然会报 `java.lang.UnsupportedOperationException` 异常。 使用 `of()` 创建的集合为不可变集合，不能进行添加、删除、替换、 排序等操作，不然会报 `java.lang.UnsupportedOperationException` 异常。