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                簡介 ``` java.util.Properties 繼承于 Hashtable ,來表示一個持久的屬性集。它使用鍵值結構存儲數據,每個鍵及其 對應值都是一個 字符串。該類也被許多Java類使用,比如獲取系統屬性時, System.getProperties 方法就是返回 一個 Properties 對 ``` 構造方法 ``` public?Properties() :創建一個空的屬性列表。 ``` 方法 ``` public?Object?setProperty(String?key,?String?value) : 保存一對屬性。 public?String?getProperty(String?key) :使用此屬性列表中指定的鍵搜索屬性值。 public?Set<String>?stringPropertyNames() :所有鍵的名稱的集合。 ``` load ``` public?void?load(InputStream?inStream) : 從字節輸入流中讀取鍵值對 ``` ``` Properties?pro?=?new?Properties(); pro.load(new?FileInputStream("read.txt")); Set<String>?strings?=?pro.stringPropertyNames(); for?(String?key?:?strings?)?{ ?????????? System.out.println(key+"?‐‐?"+pro.getProperty(key)); ?? ?????? } ```
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