Merge pull request #6 from formidablae/1-what-are-classes-objects-and-methods/1.1-java-introduction-to-classes

Did 1 What are Classes Objects and Methods / 1.1 Java Introduction to Classes

Author: formidablae

1_What_are_Classes_Objects_and_Methods/1.1_Java_Introduction_to_Classes/1.1.1_Introduction_to_Classes/Store.java

@@ -0,0 +1,23 @@
+public class Store {
+  // instance fields
+  String productType;
+  int inventoryCount;
+  double inventoryPrice;
+  
+  // constructor method
+  public Store(String product, int count, double price) {
+    productType = product;
+    inventoryCount = count;
+    inventoryPrice = price;
+  }
+  
+  // main method
+  public static void main(String[] args) {
+    Store lemonadeStand = new Store("lemonade", 42, .99);
+    Store cookieShop = new Store("cookies", 12, 3.75);
+    
+    System.out.println("Our first shop sells " + lemonadeStand.productType + " at " + lemonadeStand.inventoryPrice + " per unit.");
+    
+    System.out.println("Our second shop has " + cookieShop.inventoryCount + " units remaining.");
+  }
+}

1_What_are_Classes_Objects_and_Methods/1.1_Java_Introduction_to_Classes/1.1.2_Classes_Syntax/Store.java

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+public class Store {
+	public static void main(String[] args) {
+
+	}
+}

1_What_are_Classes_Objects_and_Methods/1.1_Java_Introduction_to_Classes/1.1.3_Classes_Constructors/Store.java

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+public class Store {
+
+  // new method: constructor!
+	public Store() {
+		System.out.println("I am inside the constructor method.");
+	}
+
+  // main method is where we create instances!
+	public static void main(String[] args) {
+		System.out.println("Start of the main method.");
+
+    // create the instance below
+		Store lemonadeStand = new Store();
+    
+    // print the instance below
+		System.out.println(lemonadeStand);
+	}
+}

1_What_are_Classes_Objects_and_Methods/1.1_Java_Introduction_to_Classes/1.1.4_Classes_Instance_Fields/Store.java

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+public class Store {
+  // declare instance fields here!
+  String productType;
+  
+  // constructor method
+  public Store() {
+    System.out.println("I am inside the constructor method.");
+  }
+  
+  // main method
+  public static void main(String[] args) {
+    System.out.println("This code is inside the main method.");
+    
+    Store lemonadeStand = new Store();
+    
+    System.out.println(lemonadeStand);
+  }
+}

1_What_are_Classes_Objects_and_Methods/1.1_Java_Introduction_to_Classes/1.1.5_Classes_Constructor_Parameters/Store.java

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+public class Store {
+  // instance fields
+  String productType;
+  
+  // constructor method
+  public Store(String product) {
+    productType = product;
+  }
+  
+  // main method
+  public static void main(String[] args) {
+    
+    
+  }
+}

1_What_are_Classes_Objects_and_Methods/1.1_Java_Introduction_to_Classes/1.1.6_Classes_Assigning_Values_to_Instance_Fields/Store.java

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+public class Store {
+  // instance fields
+  String productType;
+  
+  // constructor method
+  public Store(String product) {
+    productType = product;
+  }
+  
+  // main method
+  public static void main(String[] args) {
+    Store lemonadeStand = new Store("lemonade");
+    System.out.println(lemonadeStand.productType);
+  }
+}

1_What_are_Classes_Objects_and_Methods/1.1_Java_Introduction_to_Classes/1.1.7_Classes_Multiple_Fields/Store.java

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+public class Store {
+  // instance fields
+  String productType;
+  int inventoryCount;
+  double inventoryPrice;
+  
+  // constructor method
+  public Store(String product, int count, double price) {
+    productType = product;
+    inventoryCount = count;
+    inventoryPrice = price;
+  }
+  
+  // main method
+  public static void main(String[] args) {
+    Store cookieShop = new Store("cookies", 12, 3.75);
+  }
+}

1_What_are_Classes_Objects_and_Methods/1.1_Java_Introduction_to_Classes/1.1.8_Classes_Review/Dog.java

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+public class Dog {
+  String breed;
+  boolean hasOwner;
+  int age;
+  
+  public Dog(String dogBreed, boolean dogOwned, int dogYears) {
+    System.out.println("Constructor invoked!");
+    breed = dogBreed;
+    hasOwner = dogOwned;
+    age = dogYears;
+  }
+  
+  public static void main(String[] args) {
+    System.out.println("Main method started");
+    Dog fido = new Dog("poodle", false, 4);
+    Dog nunzio = new Dog("shiba inu", true, 12);
+    boolean isFidoOlder = fido.age > nunzio.age;
+    int totalDogYears = nunzio.age + fido.age;
+    System.out.println("Two dogs created: a " + fido.breed + " and a " + nunzio.breed);
+    System.out.println("The statement that fido is an older dog is: " + isFidoOlder);
+    System.out.println("The total age of the dogs is: " + totalDogYears);
+    System.out.println("Main method finished");
+  }
+}