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Wednesday, February 1, 2023

How to Automate Basic File Operations Using Java – MUO – MakeUseOf

Many applications need to work with files, whether they’re writing, moving, or deleting them. Learn how to do all this, and more, using Java.
There are many repetitive tasks that you may need to complete from time to time. One example is if you need to regularly make changes to files on your local computer. These actions can include copying, moving, deleting, or archiving files.
Instead of completing these repetitive tasks manually, you can automate them using a program. You can do this with a single script file, using one of the many programming languages available, such as Java.
First, ensure that you have Oracle’s Java SE Development Kit installed. Then create a simple Java console application:
You can use the File class to programmatically access files in a directory.
There are multiple ways you can copy files. A common way to copy files (especially before Java 7 and the java.nio.file package), is to use the FileInputStream or FileOutputStream classes.
When copying files, the idea is to open an input and output stream. Using those streams, you will read the bytes of the file at the source location, and then write those bytes to the new location.
This example will use a newer implementation to copy files, by using the copy() function from the Files class of the java.nio.file package. To use the java.nio.file package, you must have Java 7 or higher installed.
You can move files or folders using the move() function in the Files class, which is also part of the java.nio.file package.
You can use the delete() method from the File class to delete a particular file.
There are many ways you can create a zip archive containing several compressed files. This example will use the ZipOutputStream and ZipEntry classes.
You can use a script to complete repetitive file manager tasks programmatically. These tasks include accessing, copying, moving, deleting, and zipping files.
Another way you can automate repetitive tasks is by using system commands in a script file. On Linux and macOS, such files are known as shell scripts, while Windows refers to them as batch scripts.
Sharlene is a Tech Writer at MUO and also works full time in Software Development. She has a Bachelor of IT and has previous experience in Quality Assurance and University tutoring. Sharlene loves gaming and playing the piano.
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