Approche Orienté Objet

Premier Appel , Méthode disponible pour entrer l'heure: Duration.ofHours(2);
Deuxième Appel , Méthode disponible pour entrer les minutes : Duration.ofHours(2).plusMinutes((54)) 

import java.time.Duration;
import java.time.LocalDateTime;

public class PhoneCall{

	private LocalDateTime callDate;
	private String number;
	private Duration callTiming;
	private static double RATE;

	public PhoneCall(LocalDateTime callDate, String number, Duration callTiming) {
		if(callDate.isAfter(callDate.now())) throw new IllegalArgumentException("La date et l heure de l'appel doit etre cohérante");
		if(callTiming.isNegative()) throw new IllegalArgumentException("La duree de l'appel ne peut pas etre négatifs");
		if(number == null || number.equals("")) throw new IllegalArgumentException("le numero ne peut pas etre une chaine vide ou null");
		if(number.length() > 9 || number.length() < 9) throw new IllegalArgumentException("le numero ne peut pas contenir plus ou moins de 9 chiffres");
		this.callDate = callDate;
		this.number= number;
		this.callTiming = callTiming;
		this.RATE = 0.15;
	}

	public PhoneCall(LocalDateTime callDate, String number, Duration callTiming, double RATE){
		this(callDate,number,callTiming);
		if (RATE <= 0) {
			throw new IllegalArgumentException();
		}
		this.RATE = RATE;
	}

	public static double getRATE() {
		return RATE;
	}

	public static void setRATE(double nRATE) {
		if (RATE <= 0) {
			throw new IllegalArgumentException();
		}
		RATE = nRATE;
	}

	public LocalDateTime getCallDate() {
		return callDate;
	}

	public String getNumber() {
		return number;
	}

	public Duration getCallTiming() {
		return callTiming;
	}
	
	public double rateCall() {
		double minutes = callTiming.toMinutes();
		return RATE * minutes;
	}

	public String toString() {
		return "Date : " + callDate+ "\nNumero Appele : " + number + "\nDuree Appel : " + callTiming
				+ "\nTarif Minute : " + RATE + " euros/minute" + "\nCout de l'appel : "  + rateCall();
	}
}

import java.time.LocalDateTime;
import java.time.Duration;
public class TestAppel {
	public static void main(String[]args){
    
    try{
    PhoneCall pc = new PhoneCall(LocalDateTime.of(2017,7, 22, 18, 00) ,"025671237" , Duration.ofHours(2).plusMinutes(54).plusSeconds(33));
	System.out.println(pc.toString());	
    }catch(IllegalArgumentException e){
     System.out.println(e.getMessage());    
    }
    
  }
}