Adding more examples and classes

Author: Paulo Henrique Ortolan

Java10Examples.iml

@@ -3,8 +3,22 @@
 public class BasicExample {
 
     public static void main(String[] args) {
+        var b = false;
+        var y = (byte)10;
+        var c = 'A';
+        var s = (short)100;
         var i = 0;
+        var l = 999l;
+        var f = 3.14f;
+        var d = 1.61803398874d;
 
+        System.out.println(b);
+        System.out.println(y);
+        System.out.println(c);
+        System.out.println(s);
         System.out.println(i);
+        System.out.println(l);
+        System.out.println(f);
+        System.out.println(d);
     }
 }

src/main/java/org/java10/examples/BasicExample.java

@@ -1,9 +1,39 @@
 package org.java10.examples;
 
+import org.java10.examples.beans.Bill;
+import org.java10.examples.beans.DiscoutType;
+import org.java10.examples.beans.Product;
+
 public class ComplexObjectExample {
 
     public static void main(String[] args) {
+        var bill = Bill.newBill();
+
+        var productLaptop = new Product("Good Laptop", 1000f, 10f);
+        var productGamerMouse = new Product("Gamer Mouse", 20f, 1);
+        var productGamerKeyboard = new Product("Gamer Keyboard",15, 1);
+        var productUSBController = new Product("USB Controller", 35, 2);
+
+        bill
+            .addProduct(productLaptop, DiscoutType.COMMON_DISCOUNT, 0.15f)
+            .addProduct(productGamerMouse, DiscoutType.INTERNET_DISCOUNT, 0f)
+            .addProduct(productGamerKeyboard, DiscoutType.NO_DISCOUNT, 0f)
+            .addProduct(productUSBController, DiscoutType.COMMON_DISCOUNT, 0.20f);
+
+        var productList = bill.productList();
+
+        System.out.println("-[ Bill ]-----------------------------------------------------------");
+
+        for(Product product : productList) {
+            System.out.println(product.toString());
+        }
+
+        System.out.println("--------------------------------------------------------------------");
+
+        System.out.println(String.format("%44.2f", bill.total()));
+        System.out.println(String.format("%68.2f", bill.taxes()));
 
+        System.out.println("--------------------------------------------------------------------");
     }
 
 }

src/main/java/org/java10/examples/ComplexObjectExample.java

@@ -28,5 +28,10 @@ public static void main(String[] args) {
         System.out.println(string);
         System.out.println(now.format(formatter));
         System.out.println(stringList);
+
+        System.out.println(string.getClass());
+        System.out.println(now.getClass());
+        System.out.println(formatter.getClass());
+        System.out.println(stringList.getClass());
     }
 }

src/main/java/org/java10/examples/ObjectExample.java

@@ -5,7 +5,7 @@
 public class ProductExample {
 
     public static void main(String[] args) {
-        var modifiedProduct = new Product(8f, 0.5f) {
+        var modifiedProduct = new Product("An internet product", 8f, 0.5f) {
             public float applyInternetPrice() {
                 return getPrice() - 1f + getTax();
             }
@@ -17,7 +17,7 @@ public float applyInternetPrice() {
         System.out.println(modifiedProduct.applyInternetPrice());
         System.out.println("----------------");
 
-        var commonProduct = new Product(8f, 0.5f);
+        var commonProduct = new Product("A not internet product", 8f, 0.5f);
 
         System.out.println("Common product");
         System.out.println(commonProduct.calculateTotal());

src/main/java/org/java10/examples/ProductExample.java

@@ -0,0 +1,62 @@
+package org.java10.examples.beans;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class Bill {
+
+    private List<ProductLine> products;
+
+    private Bill() {
+        products = new ArrayList<>();
+    }
+
+    public static Bill newBill() {
+        return new Bill();
+    }
+
+    public Bill addProduct(Product product, DiscoutType type, float discount) {
+        products.add(ProductLine.newLine(product, type, discount));
+        return this;
+    }
+
+    public List<Product> productList() {
+        return products
+            .stream()
+            .map(ProductLine::getProduct)
+            .collect(Collectors.toList());
+    }
+
+    public double total() {
+        double total = 0d;
+
+        for(ProductLine productLine : products) {
+            switch (productLine.getDiscoutType()) {
+                case COMMON_DISCOUNT:
+                    total += productLine.getProduct().applyDiscount(productLine.getDiscount());
+                    break;
+                case INTERNET_DISCOUNT:
+                    var internetProduct = new Product(productLine.getProduct().getName(), productLine.getProduct().getPrice(), productLine.getProduct().getTax()) {
+                        public float applyInternetPrice() {
+                            return getPrice() - 1f + getTax();
+                        }
+                    };
+
+                    total += internetProduct.applyInternetPrice();
+                    break;
+                default:
+                    total += productLine.getProduct().calculateTotal();
+            }
+        }
+
+        return total;
+    }
+
+    public double taxes() {
+        return productList()
+            .stream()
+            .mapToDouble(p -> p.getTax())
+            .sum();
+    }
+}

src/main/java/org/java10/examples/beans/Bill.java

@@ -0,0 +1,9 @@
+package org.java10.examples.beans;
+
+public enum DiscoutType {
+
+    NO_DISCOUNT,
+    COMMON_DISCOUNT,
+    INTERNET_DISCOUNT
+
+}

src/main/java/org/java10/examples/beans/DiscoutType.java

@@ -2,14 +2,20 @@
 
 public class Product {
 
+    private final String name;
     private final float price;
     private final float tax;
 
-    public Product(float price, float tax) {
+    public Product(String name, float price, float tax) {
+        this.name = name;
         this.price = price;
         this.tax = tax;
     }
 
+    public String getName() {
+        return name;
+    }
+
     public float getPrice() {
         return price;
     }
@@ -25,4 +31,8 @@ public float calculateTotal() {
     public float applyDiscount(float discount) {
         return (price - (price * discount)) + tax;
     }
+
+    @Override public String toString() {
+        return String.format("%-20s\t%20.2f\t%20.2f", name, price, tax);
+    }
 }

src/main/java/org/java10/examples/beans/Product.java

@@ -0,0 +1,30 @@
+package org.java10.examples.beans;
+
+public class ProductLine {
+
+    private final Product product;
+    private final DiscoutType discoutType;
+    private final float discount;
+
+    private ProductLine(Product product, DiscoutType discoutType, float discount) {
+        this.product = product;
+        this.discoutType = discoutType;
+        this.discount = discount;
+    }
+
+    public static ProductLine newLine(Product product, DiscoutType discoutType, float discount) {
+        return new ProductLine(product, discoutType, discount);
+    }
+
+    public DiscoutType getDiscoutType() {
+        return discoutType;
+    }
+
+    public Product getProduct() {
+        return product;
+    }
+
+    public float getDiscount() {
+        return discount;
+    }
+}