String trim

回答: String的trim()方法是用来去除字符串前后的空白字符的。根据API说明，trim()方法返回字符串的副本，忽略前导空白和尾部空白。如果字符串中没有前导和尾部空白，则返回原字符串。如果有前导和尾部空白，则返回去除了前导和尾部空白的字符串副本。\[1\]举个例子，如果有一个字符串s = " a s f g "，调用s.trim()方法后，返回的结果是"a s f g"，即去除了前后空格的字符串。\[2\]另外，调用trim()方法并不会改变原字符串的值，而是返回一个新的字符串副本。\[3\]
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- *1* *3* [String.trim()方法说明](https://blog.csdn.net/zp357252539/article/details/103308088)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^koosearch_v1,239^v3^insert_chatgpt"}} ] [.reference_item]
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