se agregan ejercicios de 8 al 14

src/main/java/rosario/exercises/exercise_08_methods/ex08_1_exercise/Item.java

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+
+package rosario.exercises.exercise_08_methods.ex08_1_exercise;
+
+public class Item {
+    char color;
+    public boolean setColor(char colorCode){
+        if(colorCode == ' '){
+            return false;
+        }else{
+            this.color = colorCode;
+            return true;
+        }
+    }
+
+}

src/main/java/rosario/exercises/exercise_08_methods/ex08_1_exercise/ShoppingCart.java

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+
+package rosario.exercises.exercise_08_methods.ex08_1_exercise;
+
+public class ShoppingCart {
+    public static void main(String[] args){
+        Item item1 = new Item();
+        if(/*item1.setColor(' ')*/item1.setColor('U')){
+            System.out.println(item1.color);
+        }else{
+            System.out.println("Invalid color.");
+        }
+    }
+}

src/main/java/rosario/exercises/exercise_08_methods/ex08_2_exercise/Item.java

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+
+package rosario.exercises.exercise_08_methods.ex08_2_exercise;
+
+
+public class Item {
+    String desc;
+    int quantity;
+    double price;
+    char colorCode = 'U';   //'U' = Undetermined
+
+    public void displayItem() {
+        System.out.println("Item: " + desc + ", " + quantity + ", "
+                + price + ", "+colorCode);
+    }
+
+    public void setItemFields(String desc, int quantity, double price) {
+        this.desc = desc;
+        this.quantity = quantity;
+        this.price = price;
+    }
+
+    public int setItemFields(String desc, int quantity, double price, char colorCode) {
+        if(colorCode == ' '){
+            return -1;
+        }else{
+            this.setItemFields(desc, quantity, price);
+            this.colorCode = colorCode;
+            return 1;
+        }
+    }
+
+}

src/main/java/rosario/exercises/exercise_08_methods/ex08_2_exercise/ShoppingCart.java

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+
+package rosario.exercises.exercise_08_methods.ex08_2_exercise;
+
+
+public class ShoppingCart {
+    public static void main(String[] args) {
+        Item item1 = new Item();
+        item1.setItemFields("hola",2,50.0);
+        item1.displayItem();
+
+        // case valid
+        if(item1.setItemFields("adios", 3, 100.0,'A') < 0){
+            System.out.println("Invalid Color");
+        }else{
+            item1.displayItem();
+        }
+
+        // Case invalid
+        //if(item1.setItemFields("adios", 3, 100.0,' ') < 0){
+            //System.out.println("Invalid Color");
+        //}else{
+          //  item1.displayItem();
+        //}
+
+    }
+
+}

src/main/java/rosario/exercises/exercise_09_encapconstructors/ex09_1_exercise/ShoppingCart.java

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+package rosario.exercises.exercise_09_encapconstructors.ex09_1_exercise;
+
+/**
+ * Created by rosario
+ */
+public class ShoppingCart {
+    private String name;
+    private String ssn;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getSsn() {
+        return ssn;
+    }
+}

src/main/java/rosario/exercises/exercise_09_encapconstructors/ex09_2_exercise/Customer.java

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+package rosario.exercises.exercise_09_encapconstructors.ex09_2_exercise;
+
+/**
+ * Created by rosario
+ */
+public class Customer {
+    private String name;
+    private String ssn;
+
+    public Customer(String name, String ssn){
+        this.name = name;
+        this.ssn = ssn;
+    }
+
+    public String getName(){
+        return name;
+    }
+    public void setName(String n){
+        name = n;
+    }
+
+    public String getSSN(){
+        return ssn;
+    }
+}

src/main/java/rosario/exercises/exercise_09_encapconstructors/ex09_2_exercise/ShoppingCart.java

@@ -0,0 +1,13 @@
+package rosario.exercises.exercise_09_encapconstructors.ex09_2_exercise;
+
+/**
+ * Created by rosario
+ */
+public class ShoppingCart {
+    public static void main(String args[]) {
+        Customer customer = new Customer("Rosario", "CUER931007MTLRSS08");
+        System.out.println(customer.getName());
+        System.out.println(customer.getSSN());
+
+    }
+}

src/main/java/rosario/exercises/exercise_10_conditions/ex10_1_exercise/TestClass.java

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+
+package rosario.exercises.exercise_10_conditions.ex10_1_exercise;
+
+
+public class TestClass {
+
+    public static void main(String args[]) {
+        int x = 4, y = 9;
+        if (y / x < 3) {
+            x += y;
+        } else {
+            x *= y;
+        }
+        System.out.println("After if stmt, x = " + x);
+
+        //Operator ternary
+        x = y/x<3?(x += y):(x *= y);
+        System.out.println("Operator ternary, x = " + x);
+
+    }
+}

src/main/java/rosario/exercises/exercise_10_conditions/ex10_2_exercise/Order.java

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+
+package rosario.exercises.exercise_10_conditions.ex10_2_exercise;
+
+public class Order {
+
+    static final char CORP = 'C';
+    static final char PRIVATE = 'P';
+    static final char NONPROFIT = 'N';
+    String name;
+    double total;
+    String stateCode;
+    double discount;
+    char custType;
+
+    public Order(String name, double total, String state, char custType) {
+        this.name = name;
+        this.total = total;
+        this.stateCode = state;
+        this.custType = custType;
+        calcDiscount();
+    }
+
+    public String getDiscount() {
+        return Double.toString(discount) + "%";
+    }
+
+    // Code the calcDiscount method.
+    public void calcDiscount() {
+        if (total > 900) {
+            if (NONPROFIT == custType) {
+                discount = 10.0;
+            } else if (PRIVATE == custType) {
+                discount = 7.0;
+            }
+        } else if (CORP == custType && total < 500) {
+            discount = 8.0;
+        } else if (total < 900) {
+            if (NONPROFIT == custType) {
+                discount = 5.0;
+            } else if (PRIVATE == custType) {
+                discount = 0.0;
+            } else if (CORP == custType && total > 500) {
+                discount = 5.0;
+            }
+        }
+    }
+}

src/main/java/rosario/exercises/exercise_10_conditions/ex10_2_exercise/ShoppingCart.java

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+
+package rosario.exercises.exercise_10_conditions.ex10_2_exercise;
+
+public class ShoppingCart {
+    public static void main(String args[]){
+        Order order = new Order("Rick Wilson", 1000, "VA", Order.CORP);
+        System.out.println("Discount is: "+ order.getDiscount());
+    }
+}

src/main/java/rosario/exercises/exercise_10_conditions/ex10_3_exercise/Order.java

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+
+package rosario.exercises.exercise_10_conditions.ex10_3_exercise;
+
+public class Order {
+    static final char CORP = 'C';
+    static final char PRIVATE = 'P';
+    static final char NONPROFIT = 'N';
+    String name;
+    double total;
+    String stateCode;
+    double discount;
+    char custType;
+
+    public Order(String name, double total, String state, char custType) {
+        this.name = name;
+        this.total = total;
+        this.stateCode = state;
+        this.custType = custType;
+        calcDiscount();
+    }
+
+    public String getDiscount(){
+        return Double.toString(discount) + "%";
+    }
+
+    public void calcDiscount() {
+        // Replace the if logic with a switch statement.
+        switch (custType){
+            case NONPROFIT:
+                if (total > 900) {
+                    discount = 10.00;
+                } else {
+                    discount = 5.00;
+                }
+                break;
+            case PRIVATE:
+                if (total > 900) {
+                    discount = 7.00;
+                } else {
+                    discount = 0.00;
+                }
+                break;
+            case CORP:
+                if (total < 500) {
+                    discount = 8.00;
+                } else {
+                    discount = 5.00;
+                }
+                break;
+            default:
+                discount = 0.0;
+                break;
+        }
+    }
+}

src/main/java/rosario/exercises/exercise_10_conditions/ex10_3_exercise/ShoppingCart.java

@@ -0,0 +1,9 @@
+
+package rosario.exercises.exercise_10_conditions.ex10_3_exercise;
+
+public class ShoppingCart {
+    public static void main(String args[]){
+        Order order = new Order("Rick Wilson", 910.00, "VA", Order.NONPROFIT);
+        System.out.println("Discount is: "+ order.getDiscount());
+    }
+}

src/main/java/rosario/exercises/exercise_11_arraysloopsdates/ex11_1_exercise/ShoppingCart.java

@@ -0,0 +1,17 @@
+package rosario.exercises.exercise_11_arraysloopsdates.ex11_1_exercise;
+
+import java.time.*;
+import java.time.format.DateTimeFormatter;
+
+public class ShoppingCart {
+    public static void main(String[] args) {
+        // Declare a LocalDateTime object, orderDate
+        LocalDateTime orderDate;
+        // Initialize the orderDate to the current date and time. Print it.
+        orderDate = LocalDateTime.now();
+        System.out.println(orderDate);
+        // Format orderDate using ISO_LOCAL_DATE; Print it.
+        System.out.print(orderDate.format(DateTimeFormatter.ISO_LOCAL_DATE));
+
+    }
+}

src/main/java/rosario/exercises/exercise_11_arraysloopsdates/ex11_2_exercise/ShoppingCart.java

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+
+package rosario.exercises.exercise_11_arraysloopsdates.ex11_2_exercise;
+
+public class ShoppingCart {
+    public static void main(String[] args) {
+        String name;
+        int age;
+        if(args.length <2){
+            System.out.println("2 arguments are required.");
+        }else{
+            name = args[0];
+            age = Integer.parseInt(args[1]);
+            System.out.println("name: "+name);
+            System.out.println("age: "+age);
+        }
+    }
+}

src/main/java/rosario/exercises/exercise_11_arraysloopsdates/ex11_3_exercise/Item.java

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+package rosario.exercises.exercise_11_arraysloopsdates.ex11_3_exercise;
+
+public class Item {
+
+    private int id;
+    private String desc;
+    private double price;
+    private boolean isBackOrdered;
+    private static int nextId = 1;
+
+    public Item(String desc, double price) {
+        setId();
+        this.desc = desc;
+        this.price = price;
+        checkStock();
+    }
+
+    private void checkStock(){  // typically would query a database here
+
+        // Negative random numbers will result in isBackOrdered = true
+        double num = Math.random() * 1000;
+
+        if ((int)num % 2 == 1 ){  
+            this.isBackOrdered = true;
+            System.out.println(getDesc() +" is back ordered.");
+        }
+        else this.isBackOrdered();
+    }
+
+    private void setId() {
+        id = Item.nextId++;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String getDesc() {
+        return desc;
+    }
+
+    public void setDesc(String desc) {
+        this.desc = desc;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+
+    public boolean isBackOrdered() {
+        return isBackOrdered;
+    }
+}