DataInputStream

import java.io.*;
import java.io.File;

public class Main {
    public static void main(String[] args) throws IOException {
        DataInputStream reader=new DataInputStream(new FileInputStream("vlez.txt"));
        //ako sakame da citame od file od InputStreamReader mora da imame new FileInputStream
        DataOutputStream writer=new DataOutputStream(new FileOutputStream("izlez.txt"));
        //da zapsuvam char double bool int..
        float pom=1;
        while (pom!=0.0)
        {
            pom=reader.readFloat();
            //read line zima bez nov read so nov red
            writer.writeFloat(pom);
        }
        reader.close();
        writer.close();
    }
}