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Peter Penzov
Peter Penzov

Reputation: 1670

Get content of a file in Java

I want to get the version of Linux using Java code. In different Linux distributions I have file with diffrent name.

/etc/*-release

How I can get every file content which ends with -release?

Upvotes: 0

Views: 280

Answers (5)

Dmitry Ginzburg
Dmitry Ginzburg

Reputation: 7461

Surely, you should use nio nowadays for this type of action:

Path dir = Paths.get("/etc");
for (Path file : Files.newDirectoryStream(dir, "*-release"))
    System.out.println (new String(Files.readAllBytes(file), "UTF-8"));

Upvotes: 0

Grim
Grim

Reputation: 2026

System.getProperty("os.version")

Upvotes: 1

Rong Nguyen
Rong Nguyen

Reputation: 4189

You can get files by getting output after executing ls -d /etc/*-release.

And then work with them via Java File.

See also:

Upvotes: 0

Loic Duros
Loic Duros

Reputation: 5802

Use Java java.io.File#listFiles and then simply iterate over the array that it returns to open the files.

Upvotes: 2

sanbhat
sanbhat

Reputation: 17622

You can use File.listFiles(FilenameFilter)

    File f = new File("/etc/");
    File[] allReleaseFiles = f.listFiles(new FilenameFilter() {

        @Override
        public boolean accept(File dir, String name) {
            return name.endsWith("-release");
        }
    });

Upvotes: 6

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