However, with a small workaround, it is still possible: String fileName =. There is no one-to-one equivalent of the Stream-generating method Files.lines(), that is, no method that writes directly from a String Stream to a file. įiles.write(Path.of(fileName), lines) Code language: Java ( java ) Writing a String Stream to a text file With the following command, you can write a String list (or more precisely: an Iterable) into a text file: String fileName =. Often you don't write a single String into a text file, but several Strings as lines. įiles.writeString(Path.of(fileName), text) Code language: Java ( java ) Writing a list of Strings to a text file It is just as easy to write a string to a file – but only since Java 11: String fileName =. Internally, both methods call FileSystems.getDefault().getPath(). Before Java 11, you can use Paths.get() instead. In the example, the static Path.of() method – available since Java 11 – is used to create a Path object from a file name. It describes a file or directory name and provides utility methods for constructing it. The method expects a Path object as the first parameter. įiles.write(Path.of(fileName), bytes) Code language: Java ( java ) You can write a byte array to a file with the following command: String fileName =. This class contains methods to write a byte array, a String, or a list of Strings to a file with a single command. In Java 7, the utility class was added with the "NIO.2 File API" (NIO stands for New I/O). You had to open a FileOutputStream or a FileWriter, if necessary, wrap it with a BufferedOutputStream or BufferedWriter, write into it, and finally – also in case of an error – close all streams again. Up to and including Java 6, there was no easy way to write files. What is the easiest way to write to a file in Java? I already mentioned the topic of operating system independence in the first part, i.e., what to consider when coding characters, line breaks, and path names. When to use Files.newOutputStream() and Files.newBufferedWriter()?.When to use FileWriter, FileOutputStream, OutputStreamReader, BufferedOutputStream and BufferedWriter?.When processing large amounts of data, how do you write the data directly to files (without first having to build up the complete contents of the file in memory)?.How to write a byte array to a binary file?.What is the easiest way to write a string or a list of strings to a text file?.The article addresses the following questions in detail: After the first part of the series was about reading files in Java, this second part introduces the corresponding methods for writing small and large files.
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