Description:
Writing data to a file in Java involves using classes from the java.io or java.nio.file packages. FileWriter is commonly used for writing text data, often paired with BufferedWriter for efficient, buffered output. The write method allows data to be written as strings or characters, and newLine can be used to insert line breaks when writing multiple lines. For binary data, FileOutputStream writes bytes or byte arrays directly to the file. The PrintWriter class provides additional formatting options for writing formatted text, such as using printf or println. In modern Java, Files from java.nio.file simplifies writing data with methods like write, which can write a list of strings or byte arrays directly. Using try-with-resources ensures proper resource management by automatically closing the file streams and handling exceptions efficiently.