import java.io.Reader;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

class MyReaderIterator implements OOPIterator{
	private String currentLine;
	private BufferedReader r;

	MyReaderIterator(Reader r) {
		this.r = new BufferedReader(r);
		try{
			currentLine = this.r.readLine();
		}catch(IOException e){
			r = null;
		}
	}

	public Object peek(){
		return currentLine;
	}

	public boolean hasNext(){
		return currentLine != null;
	}

	public Object next(){
		Object ret = peek();
		try{
			currentLine = r.readLine();
		}catch(IOException e){
			r = null;
		}
		return ret;
	}

	public static void main(String[] args) throws IOException{
		Reader r = new FileReader("C:\\myfile.txt");
		MyReaderIterator itr = new MyReaderIterator( r );
		while ( itr.hasNext() ){
			String s = (String) itr.next();
			if ( s.length() >= 10 )
				System.out.println( s );
		}
	}

}

interface OOPIterator{

	/* pre: none
	 * post: return true if the iterator is not empty.
	 */
	public boolean hasNext();

	/* pre: hasNext()
	 * post: return head of iterator; this is now tail.
	 */
	public Object next();

	/* pre: hasNext()
	 * post: return head of iterator; do not change this
	 */
	public Object peek();

}