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                ## list ~~~ File f1 = new File("./"); //返回一個字符串數組,返回當前文件夾的所有文件名 String[] paths = f1.list(); for (String path : paths) { System.out.println(path); } ~~~ ## listFlies() 包括隱藏文件,文件和文件夾.只能列出一級的. ~~~ File f1 = new File("./"); //返回一個File數組,返回當前文件夾的所有文件對象 File[] files = f1.listFiles(); for (File file : files) { System.out.println(file); } } ~~~ ## 注意事項 在獲取指定目錄下的文件或者文件夾時,必須滿足下面兩個條件.否則容易返回數組為null,再使用該null數組時會出現NullPointerException 1. 指定的目錄必須是存在的. 2. 指定的必須 是目錄.
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