Web Reference: Some platforms, in particular, allow a file to be opened for writing by only one FileWriter (or other file-writing object) at a time. In such situations the constructors in this class will fail if the file involved is already open. FileWriter is meant for writing streams of characters. Nov 4, 2025 · The FileWriter class in Java is used to write character data to files. It extends OutputStreamWriter and handles characters directly, making it ideal for writing text files with either the default or a specified encoding. If you are just starting with Java, the easiest way to write text to a file is by using the FileWriter class. In the example below, we use FileWriter together with its write() method to create and write some text into a file.
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