UserDatabase

gistfile1.java

package test_Bookingsystem;
 
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.*;
 
public class UserDatabase {
	
	// We use DataOutputStream and DataInputStream to save and load users to the harddisc, and use them in the
	// program later
	
	//save users to harddisc 
	public void saveUser(User user) {
		try(DataOutputStream output = new DataOutputStream(new FileOutputStream("UserDatabase1.dat", true))){
			output.writeUTF(user.getName());
			output.writeUTF(user.getEmail());
			output.writeLong(user.getPhonenumber());
		} 
		catch (IOException ex) {
			System.out.println(" error ");
		}
	}
	
	// getUSer gets users from harddisc.....evt ændre til loadUser ? 
	public User[] getUsers () {
		ArrayList<User> users = new ArrayList<User>();
		try(DataInputStream input = new DataInputStream(new FileInputStream("UserDatabase1.dat"))){
			String name = input.readUTF();
			String email = input.readUTF();
			long phoneNumber = input.readLong();
			
			
			// add user to list 
			users.add(new User(name, email, phoneNumber));
		} 
		//adding catch blocks
		catch (IOException ex) {
			//Reached end of stream. No more data to read
		}
		
		// returns the list as an array ( it converts a list of users to an array of users ) 
		return users.toArray(new User[users.size()]);
	}
}