Java File objects are commonly used for File operations (recommended ).

Java File objects are commonly used for File operations (recommended ).

File objects are the most commonly used classes for File operations. They are usually used in a lot of work, and I have posted several common methods for my work. Summary:

Directly run the Code:

// Construct the File object file = new File ("E:/android_demo/a"); File fileTest = new File ("E:/android_demo/a/test.mp3 "); // obtain the File's parent path file f = File. getParentFile (); System. out. println ("f =" + f); // E: \ android_demo // determine whether the file exists boolean is = file. exists (); // does not exist, return fasleSystem. out. println ("is =" + is); // obtain the absolute path of the object, which is equivalent to getPathString path1 = file. getAbsolutePath (); System. out. println ("path =" + path1); // E: \ android_demo \ a // obtain the file path String path2 = file. getPath (); System. out. println ("path2 =" + path2); // E: \ android_demo \ a // get the current file name String s = file. getName (); System. out. println ("s =" + s); // create a folder, that is, E:/android_demo/afile. mkdir (); // create a file, that is, E:/android_demo/a/test1_filetest. createNewFile (); // file size, number of bytes occupied during file storage; long l = f. length (); System. out. println ("l =" + l); // obtain the file path stringString str = fileTest. toString (); System. out. println ("str =" + str); // E: \ android_demo \ a \ test.pdf // rename the File fileTest2 = new File ("E: /android_demo/a/test2.mp3 "); boolean b2 = fileTest. renameTo (fileTest2); System. out. println ("b2 =" + b2); // E:/android_demo/a/test2.mp3 // delete the file boolean b3 = fileTest. delete (); // delete a folder. Note that only files in the deleted folder can be deleted. If yes, you must delete all files before deleting boolean b4 = file. delete ();

The above several common methods (recommended) for File operations on File objects in java are all the content shared by Alibaba Cloud xiaobian. I hope to give you a reference, we also hope that you can support the customer's home.