File
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InputStream f = new FileInputStream("C:/java/hello");
File f = new File("C:/java/hello");
InputStream out = new FileInputStream(f);
OutputStream f = new FileOutputStream("C:/java/hello")
File f = new File("C:/java/hello");
OutputStream f = new FileOutputStream(f);
输入和输出流是相对于内存来说的:
写入内存叫做输入流,从内存写到文件叫输出流。
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