import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;

public class AufMethodeWarten {

	static String file = "test.txt";

	public static void main(String[] args) {

		Thread t1 = new Thread() {
			public void run() {
				write();
				System.out.println("writing finished");
			}
		};
		t1.start();

		Thread t2 = new Thread() {
			public void run() {
				try {
					t1.join();
				} catch (InterruptedException e1) {
					e1.printStackTrace();
				}
				read();
				System.out.println("reading finished");
			}
		};
		t2.start();

	}

	static void write() {
		PrintWriter writer = null;
		try {
			writer = new PrintWriter(new FileWriter(file), true);
			for (int i = 0; i < 10; i++) {
				System.out.println("writing " + i);
				writer.write(new Integer(i).toString() + "\n");
			}
		} catch (IOException ioe) {
			ioe.printStackTrace();
		} finally {
			if (writer != null) {
				writer.flush();
				writer.close();
			}
		}
	}

	static void read() {
		BufferedReader reader = null;
		String zeile;
		try {
			reader = new BufferedReader(new FileReader(file));
			while ((zeile = reader.readLine()) != null) {
				System.out.println("reading " + zeile);
			}
		} catch (IOException ioe) {
			ioe.printStackTrace();
		} finally {
			try {
				if (reader != null) {
					reader.close();
				}
			} catch (IOException ioe) {
			}
		}
	}
}