import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
public class Main {
public static void main(String[] args) throws Exception{
int idA = 1;
String nameA = "City";
int populationA = 5;
float tempA = 1.0f;
int idB = 2;
String nameB = "S";
int populationB = 2;
float tempB = 1.45f;
FileOutputStream fos = new FileOutputStream("cities.dat");
DataOutputStream dos = new DataOutputStream(fos);
dos.writeInt(idA);
dos.writeUTF(nameA);
dos.writeInt(populationA);
dos.writeFloat(tempA);
dos.writeInt(idB);
dos.writeUTF(nameB);
dos.writeInt(populationB);
dos.writeFloat(tempB);
dos.flush();
dos.close();
FileInputStream fis = new FileInputStream("cities.dat");
DataInputStream dis = new DataInputStream(fis);
int cityId = dis.readInt();
System.out.println("City Id: " + cityId);
String cityName = dis.readUTF();
System.out.println("City Name: " + cityName);
int cityPopulation = dis.readInt();
System.out.println("City Population: " + cityPopulation);
float cityTemperature = dis.readFloat();
System.out.println("City Temperature: " + cityTemperature);
}
}