Java 将字符串列表的所有元素转换为大写
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Transform all elements of a list of strings to upper case
提问by lapots
I want to transform a list of strings to upper case.
我想将字符串列表转换为大写。
Here's my code to do this:
这是我执行此操作的代码：
List<String> list = Arrays.asList("abc", "def", "ghi");
List<String> upped = list.stream().map(String::toUpperCase).collect(Collectors.toList());
Is there a simpler/better way to do this?
有没有更简单/更好的方法来做到这一点？
采纳答案by Bohemian
You have not actually transformed the list; you have created a new list.
你实际上并没有改变列表；您创建了一个新列表。
To transform the list in one small method call, use List#replaceAll():
要在一个小的方法调用中转换列表，请使用List#replaceAll()：
list.replaceAll(String::toUpperCase);
