import java.io.*;
public class BinWrite {
//
public static void main(String[ ] xx)  throws IOException{
   double prices[ ] = new double[ ]{19.9, 23.4, 38.5 };
   int units[ ] = new int []{10, 7, 65};
   String descs[ ]= new String[]{"aaa","bbbb","ccc"};
 ///
   DataOutputStream dos = new DataOutputStream(
           new FileOutputStream("testfile.txt") );
for (int i = 0; i < prices.length; i++) {
    dos.writeDouble(prices[i]);
    dos.writeChar('\t');
    dos.writeInt(units[i]);
    dos.writeChar('\t');
    dos.writeUTF(descs[i]);
    dos.writeChar('\n');
}
dos.close();
}//main
}