The file now holds the information about the specified file. In the above example, we have created an object of File named file. Example: Delete a file import java.io.File Note: We can only delete empty directories. We can use the delete() method of the File class to delete the specified file or directory. Here when we run the program, the output.txt file is filled with the following content. To write data to the file, we have used the write() method. FileWriter output = new FileWriter("output.txt") The writer is linked with the output.txt file. In the above example, we have created a writer using the FileWriter class. String data = "This is the data in the output file" įileWriter output = new FileWriter("output.txt") Example: Write to file using FileWriter // importing the FileWriter class To write data to the file, we can use subclasses of either OutputStream or Writer. To read the data from the input.txt file, we have used the read() method of FileReader. FileReader input = new FileReader("input.txt") It is now linked with the input.txt file. In the above example, we have used created an object of FileReader named input. importing the FileReader classįileReader input = new FileReader("input.txt") Now let's try to read the file using Java FileReader. Suppose we have a file named input.txt with the following content. To read data from the file, we can use subclasses of either InputStream or Reader. However, if newFile.txt already exists, we will see this message. If newFile.txt doesn't exist in the current location, the file is created and this message is shown. Here, we have used the file object to create the new file with the specified path. The file object is linked with the specified file path. In the above example, we have created a file object named file. trying to create a file based on the object create a file object for the current location false if the file already exists in the specified location.Įxample: Create a new File // importing the File class.To create a new file, we can use the createNewFile() method. Instead, a file object is an abstract representation of the file or directory pathname (specified in the parenthesis). Note: In Java, creating a file object does not mean creating a file. The object can be used to work with files and directories. Here, we have created a file object named file. creates an object of File using the path Once we import the package, here is how we can create objects of file. To create an object of File, we need to import the java.io.File package first. A directory inside a directory is known as subdirectory. Main.java is a Java file that contains information about the Java program.Ī directory is a collection of files and subdirectories. However, in this tutorial, we will focus on the java.io package.Ī file is a named location that can be used to store related information. There is another package named java.nio that can be used to work with files. The application works on any device, including smartphones.The File class of the java.io package is used to perform various operations on files and directories. You can also download the PDF file to share with someone or view later. You can print the file you are viewing directly from your browser. We value your privacy, so the file is visible to you only. This free online application based on the GroupDocs.Viewer API displays the TXT files on your device. GroupDocs.Viewer technologies make it possible to achieve an ideal and identical display of a document on any platform. Powered by a high-performance cloud-based GroupDocs server, it displays the TXT files in the browser. GroupDocs.Viewer is a fast and efficient API for rendering over 170 different file types. Of course, you can get to the computer, but sometimes it takes time, and the computer may not have the necessary software. Also, you can get the file on your mobile phone, but many software packages do not have mobile versions. However, you will not install a software package that is ten gigabytes or more and even pay for it to view one file. Processing files of a certain type often requires specialized software that takes up a lot of space and sometimes is not free. GroupDocs.Classification Product SolutionĬomputer applications store information in files of different types.
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