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java.lang.String类 概述 public final class String implements java.io.Serializable, Comparable<String>, CharSequence { /** The value is used for character 阅读全文
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List转Array toArray 首先展示初学者容易犯的错误示例 List<String> strList = new ArrayList<>(); strList.add("list-a"); strList.add("list-b"); String[] strArray = (String 阅读全文