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 = System.IO.File.ReadAllText("path to file");
If not... what is the 'optimal way' to do this...?
Edit:
I prefer a way within Java standard libraries... I can not use 3rd party libraries..
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.
*
* <p> 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
Not quite a one liner and probably obsolete if using JDK 11 as posted by nullpointer. Still usefull if you have a non file input stream
InputStream inStream = context.getAssets().open(filename);
Scanner s = new Scanner(inStream).useDelimiter("\\A");
String string = s.hasNext() ? s.next() : "";
inStream.close();
return string;