gistfile1.java

    public void testSkip() throws Exception {
        File test = File.createTempFile("blah", "blah");
        FileOutputStream out = new FileOutputStream(test);
        out.getChannel().position(1024);
        out.write(new byte[]{1, 2, 3, 4, 5, 6});
        out.getChannel().position(512);
        out.write(new byte[]{6, 5, 4, 3, 2, 1});
        out.close();
        FileInputStream in = new FileInputStream(test);
        System.err.println("Initial " + TestUtil.toHex(StreamUtil.readBytes(in, 6)));
        in.skip(506);
        System.err.println("Middle " + TestUtil.toHex(StreamUtil.readBytes(in, 6)));
        in.skip(506);
        System.err.println("Final " + TestUtil.toHex(StreamUtil.readBytes(in, 6)));
        System.err.println("Next " + in.read());
        in.close();
        test.delete();
    }

output

05-03 15:19:17.067: WARN/System.err(31845): Initial 00000000 0000
05-03 15:19:17.067: WARN/System.err(31845): Middle 06050403 0201
05-03 15:19:17.067: WARN/System.err(31845): Final 01020304 0506
05-03 15:19:17.067: WARN/System.err(31845): Next -1