Assorted Java 7 features

Java7Lols.java

package foo;

import static java.util.EnumSet.of;

import java.io.File;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.FileChannel;
import java.nio.channels.ReadableByteChannel;
import java.nio.charset.Charset;
import java.nio.file.FileStore;
import java.nio.file.FileVisitOption;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.InvalidPathException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.StandardOpenOption;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.ArrayList;
import java.util.Collection;

public class Java7Lols {
	public static void main(String[] args) throws IOException {
		Collection<Java7Lols> foo = new ArrayList<>();

		int c = 1_234_567;

		Charset utf8 = Charset.forName("UTF-8");
		try (ReadableByteChannel ch = FileChannel.open(Paths.get("src/foo/Java7Lols.java"), StandardOpenOption.READ)) {
			ByteBuffer buf = ByteBuffer.allocate(1024);
			while (ch.read(buf) != -1) {
				buf.flip();
				System.out.print(utf8.decode(buf));
				buf.clear();
			}
		} catch (InvalidPathException | ClosedChannelException e) {
			e.printStackTrace();
		}

		System.out.println("\n----");

		FileStore fileStore = new File("src/foo/Java7Lols.java")
				.toPath()
				.getFileSystem()
				.getFileStores()
				.iterator()
				.next();
		System.out.println(fileStore + " has " + fileStore.getUnallocatedSpace() + " free bytes");

		Files.walkFileTree(
				new File("src/").toPath(),
				of(FileVisitOption.FOLLOW_LINKS),
				Integer.MAX_VALUE,
				new SimpleFileVisitor<Path>() {
			@Override
			public FileVisitResult visitFile(Path file,
					BasicFileAttributes attrs) throws IOException {
				System.out.println("found " + file.toAbsolutePath() + " with inode " + attrs.fileKey());
				return FileVisitResult.CONTINUE;
			}
		});
	}
}