Whole text file to a String in Java

Question

Does Java has a one line instruction to read to a text file, like what C# has?

I mean, is there something equivalent to this in Java?:

String data =          


        

Answer 1

With JDK/11, you can read a complete file at a Path as a string using Files.readString(Path path):

try {
    String fileContent = Files.readString(Path.of("/foo/bar/gus"));
} catch (IOException e) {
    // handle exception in i/o
}

the method documentation from the JDK reads as follows:

/**
 * Reads all content from a file into a string, decoding from bytes to characters
 * using the {@link StandardCharsets#UTF_8 UTF-8} {@link Charset charset}.
 * The method ensures that the file is closed when all content have been read
 * or an I/O error, or other runtime exception, is thrown.
 *
 * 
 This method is equivalent to:
 * {@code readString(path, StandardCharsets.UTF_8) }
 *
 * @param   path the path to the file
 *
 * @return  a String containing the content read from the file
 *
 * @throws  IOException
 *          if an I/O error occurs reading from the file or a malformed or
 *          unmappable byte sequence is read
 * @throws  OutOfMemoryError
 *          if the file is extremely large, for example larger than {@code 2GB}
 * @throws  SecurityException
 *          In the case of the default provider, and a security manager is
 *          installed, the {@link SecurityManager#checkRead(String) checkRead}
 *          method is invoked to check read access to the file.
 *
 * @since 11
 */
public static String readString(Path path) throws IOException