import java.io.File;
import java.io.RandomAccessFile;
import junit.framework.TestCase;

public final class FileTest extends TestCase {
    public void testSetLastModified() throws Exception {
        File file = new File("/mnt/sdcard/testSetLastModified");
        RandomAccessFile raf = new RandomAccessFile(file, "rw");
        long length = raf.length();
        raf.setLength(length + 1);
        raf.setLength(length);
        raf.close();
        System.out.println("Created " + file);

        System.out.println("Last modified: " + file.lastModified());
    }
}