UML: use case diagram and sequence diagram

Use case diagram

This type of diagram can be used to easily show who can do what with the software system, and which use cases are realized by the application:

use case diagram

Along with the class and object diagram

 class diagram and object diagram



the following code results:

 1 public class AutomatedTellerMachine {
 2     private double moneySupply;             // encapsulated property: in all methods of class accessible
 3 
 4     AutomatedTellerMachine(float moneySupply) {
 5         this.moneySupply = moneySupply;
 6     }
 7 
 8     public double getMoneySupply() {
 9         return moneySupply;
10     }
11 }

 1 import java.util.ArrayList;
 2 import java.util.Collection;
 3 
 4 public class Bank {
 5     private double totalMoneySupply;
 6     private Collection<AutomatedTellerMachine> automatedTellerMachines = new ArrayList<>();   // Bank has * atm's
 7 
 8     public Bank(Collection<AutomatedTellerMachine> automatedTellerMachines)
 9     {
10         this.automatedTellerMachines = automatedTellerMachines;
11     }
12     public double getTotalMoneySupply()
13     {
14         return totalMoneySupply;
15     }
16 
17     public void sumMoneySupply()
18     {
19         totalMoneySupply = 0;
20         for (AutomatedTellerMachine automatedTellerMachine: automatedTellerMachines)       // sum money supply
21             totalMoneySupply += automatedTellerMachine.getMoneySupply();
22     }
23 }

 1 import java.util.ArrayList;
 2 import java.util.Arrays;
 3 
 4 public class Main {
 5 
 6     public static void main(String[] args) {
 7 
 8         AutomatedTellerMachine atm1 = new AutomatedTellerMachine(12000);
 9         AutomatedTellerMachine atm2 = new AutomatedTellerMachine(8000);
10         AutomatedTellerMachine atm3 = new AutomatedTellerMachine(10000);
11 
12         Bank bank1 = new Bank(new ArrayList<>(Arrays.asList(atm1, atm2, atm3)));// Creation of bank object:
13                                                                                 // a list with references to atm's is copied
14         System.out.println("Money supply of atm1: " + atm1.getMoneySupply());
15 
16         bank1.sumMoneySupply();
17         System.out.println("Total money supply bank1: " + bank1.getTotalMoneySupply());
18         System.out.println(bank1.getTotalMoneySupply());
19     }
20 }

Sequence diagram