From f7c307a2947def0b1d403145e225cbf45f2581c9 Mon Sep 17 00:00:00 2001
From: Giacomo Radaelli <gradaellig@protonmail.com>
Date: Mon, 15 May 2023 18:38:39 +0200
Subject: [PATCH] Aggiunti esercizi pagine 516-525

---
 .../Grafica/src/investment/BankAccount.java   | 28 +++++++++++
 .../src/investment/InvestmentViewer1.java     | 39 ++++++++++++++++
 .../src/investment/InvestmentViewer2.java     | 46 +++++++++++++++++++
 3 files changed, 113 insertions(+)
 create mode 100644 NetBeans Projects/Grafica/src/investment/BankAccount.java
 create mode 100644 NetBeans Projects/Grafica/src/investment/InvestmentViewer1.java
 create mode 100644 NetBeans Projects/Grafica/src/investment/InvestmentViewer2.java

diff --git a/NetBeans Projects/Grafica/src/investment/BankAccount.java b/NetBeans Projects/Grafica/src/investment/BankAccount.java
new file mode 100644
index 0000000..b078135
--- /dev/null
+++ b/NetBeans Projects/Grafica/src/investment/BankAccount.java	
@@ -0,0 +1,28 @@
+package investment;
+
+public class BankAccount {  
+    private double balance;
+
+    public BankAccount() {   
+        balance = 0;
+    }
+
+    public BankAccount(double initialBalance) {   
+        balance = initialBalance;
+    }
+
+    public void deposit(double amount) {  
+        double newBalance = balance + amount;
+        balance = newBalance;
+    }
+
+    public void withdraw(double amount) {   
+        double newBalance = balance - amount;
+        balance = newBalance;
+    }
+
+    public double getBalance() {   
+        return balance;
+    }
+}
+
diff --git a/NetBeans Projects/Grafica/src/investment/InvestmentViewer1.java b/NetBeans Projects/Grafica/src/investment/InvestmentViewer1.java
new file mode 100644
index 0000000..41d5d8d
--- /dev/null
+++ b/NetBeans Projects/Grafica/src/investment/InvestmentViewer1.java	
@@ -0,0 +1,39 @@
+package investment;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+
+public class InvestmentViewer1 {  
+    private static final int FRAME_WIDTH = 120;
+    private static final int FRAME_HEIGHT = 60;
+
+    private static final double INTEREST_RATE = 10;
+    private static final double INITIAL_BALANCE = 1000;
+
+    public static void main(String[] args) {  
+        JFrame frame = new JFrame();
+        frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+      
+        BankAccount account = new BankAccount(INITIAL_BALANCE);
+
+        JButton button = new JButton("Aggiungi interessi");
+        frame.add(button);
+
+        class InterestListener implements ActionListener {
+            public void actionPerformed(ActionEvent event) {
+                double interest = account.getBalance() * INTEREST_RATE / 100;
+                account.deposit(interest);
+                System.out.println("saldo: " + account.getBalance());
+            }            
+        }
+     
+        ActionListener listener = new InterestListener();
+        button.addActionListener(listener);
+
+        frame.setVisible(true);
+   }
+}
+
diff --git a/NetBeans Projects/Grafica/src/investment/InvestmentViewer2.java b/NetBeans Projects/Grafica/src/investment/InvestmentViewer2.java
new file mode 100644
index 0000000..f237b37
--- /dev/null
+++ b/NetBeans Projects/Grafica/src/investment/InvestmentViewer2.java	
@@ -0,0 +1,46 @@
+package investment;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+public class InvestmentViewer2 {  
+   private static final int FRAME_WIDTH = 400;
+   private static final int FRAME_HEIGHT = 100;
+
+   private static final double INTEREST_RATE = 10;
+   private static final double INITIAL_BALANCE = 1000;
+
+   public static void main(String[] args) {  
+      JFrame frame = new JFrame();
+      frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
+      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+      
+      BankAccount account = new BankAccount(INITIAL_BALANCE);
+
+      JButton button = new JButton("Aggiungi interessi");
+      JLabel label = new JLabel("Saldo: " + account.getBalance());
+      JPanel panel = new JPanel();
+      
+      panel.add(button);
+      panel.add(label);      
+      frame.add(panel);
+  
+      class InterestListener implements ActionListener {
+         public void actionPerformed(ActionEvent event) {
+            double interest = account.getBalance() * INTEREST_RATE / 100;
+            account.deposit(interest);
+            label.setText("Saldo: " + account.getBalance());
+         }            
+      }
+
+      ActionListener listener = new InterestListener();
+      button.addActionListener(listener);
+
+      frame.setVisible(true);
+   }
+}
+