java.io.File 他既是文件类用是文件夹类
String fileName = "d:\\test";
File file = new File(fileName );
file 是个文件夹类的实例
String fileName = "d:\\test\\test.txt";
File file = new File(fileName );
file 是个文件类的实例
String fileName = "d:\\test";
File file = new File(fileName );
file 是个文件夹类的实例
String fileName = "d:\\test\\test.txt";
File file = new File(fileName );
file 是个文件类的实例
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