Redirect stdin from a file in eclipse with run configuration

Question

There used to be a bug in eclipse that prevented a run configuration from redirecting a file to stdin but supposedly it\'s fixed. However, I can\'t find any documentation t

Answer 1

This is the announcement and description of the feature for Eclipse 4.5 (Mars): http://eclipse.org/mars/noteworthy/#_assigning_stdin_to_a_file

Stdin can now be assigned to a file in the Common tab of launch configuration dialogs.

As expected, this is a new feature of the just released Eclipse 4.5 and will therefore not work in an older version.

Answer 2

I hope I understand correctly.

The file needs to have new line at the end.

public static void main(String[] args) {
    try (Scanner scanner = new Scanner(System.in)) {
        System.out.println(scanner.next());
    }
}

File to contain a text (and ends with an new empty line, not only a text).

Then Run Configuration | Common | Input File

And the program will print the file content.

Edit: Build id: 20150621-1200

Answer 3

You will need Eclipse Mars for this, as the bugfix was not backported.

Go into Run Configurations, open your Java Application. In the Common tab, there is a Standard Input and Output group, where you can define an input file.