#JAVA FILE RENAMER HOW TO#
#JAVA FILE RENAMER UPDATE#

Solution Use a java.io.File objects renameTo( ) method. We learned that updating a file object is not possible but that we can easily copy the contents of a file to a new file and give our new file a name. Renaming a File Problem You need to change a files name on disk. It returns true if the renaming operation succeeds otherwise returns false. log (testFile instanceof Blob ) // Modern browser logs: true // Internet Explorer logs: true The Java File class provides the renameTo() method to change the name of the file. const testFile = createFile (, 'my-test.txt' ) Ĭonsole. Testing for Blob instead of File will return the correct result on all browsers as File is a subclass of Blob. log (testFile instanceof File ) // Modern browser logs: true // Internet Explorer logs: false This nifty little program let you rename massive amounts of. const testFile = createFile (, 'my-test.txt' ) Ĭonsole. To run place the required library in the same folder as the RenameTo jar. Here is how you can rename a file: import java.io. The following will be true on modern browsers but false on browsers that don’t support the File constructor (like Internet Explorer 11). In Java, you can rename a file using the File class from the java.io package. When using the instanceof operator to test for types it’s best to test for Blob. Our files can now be of type Blob or File. log (newFile ) // Browser logs: File ) Ī small caveat. name = 'my-file-final-1-really.txt' Ĭonsole. const myFile = new File (, 'my-file.txt' ) This method renames the file denoted by this abstract pathname.

#JAVA FILE RENAMER HOW TO#

Let’s create a new file using the File constructor, we’ll then rename this file in a couple seconds. On this document we will be showing a java example on how to use the renameTo (File dest) method of File Class. Lets create a new file using the File constructor, well then rename this file in a couple seconds. And if you prefer sticking with your keyboard, you can just use your arrow keys (or start typing the file name) to select a file and then hit F2 to select the file name. Right-click the file and then select Rename on the context menu.

#JAVA FILE RENAMER UPDATE#

We’ll quickly cover how to update a file object and read its contents. Click to select file and then click the name of the selected file.

A super concise tutorial on using JavaScript to rename files in the browser.

Java file renamer