OOP: Inheritance

slgobinath · slgobinath · commit b65ff2e0d7ac · 2015-01-30T16:03:21.000+05:30
diff --git a/objectorientedprogramming/inheritance/v1.0/Book.java b/objectorientedprogramming/inheritance/v1.0/Book.java
@@ -0,0 +1,74 @@
+/**
+ * Book class used to explain the encapsulation.
+ *
+ * @version 1.0
+ * @author L.Gobinath
+ */
+public class Book {
+    // Title of the book.
+    private String title;
+    // Author of the book.
+    private String author;
+    // Price of the book.
+    private double price;
+
+    /**
+     * Get the title.
+     * @return The title of the book.
+     */
+    public String getTitle() {
+        return this.title;
+    }
+
+    /**
+     * Set the title.
+     * @param title The title of the book.
+     */
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    /**
+     * Get the author of the book.
+     * @return The author of the book.
+     */
+    public String getAuthor() {
+        return this.author;
+    }
+
+    /**
+     * Set the author of the book.
+     * @param author The author of the book.
+     */
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    /**
+     * Set the price.
+     * @param price Price of the book.
+     */
+    public void setPrice(double price) {
+        if (price > 0) {
+            this.price = price;
+        } else {
+            System.out.println("Invalid price");
+        }
+    }
+
+    /**
+     * Get the price.
+     * @return Price of the book.
+     */
+    public double getPrice() {
+        return this.price;
+    }
+
+    /**
+     * Print the total amount for given quantity.
+     * @param qty The quantity
+     */
+    public void sell(int qty) {
+        System.out.println("Total: $" + (qty * price));
+    }
+}
diff --git a/objectorientedprogramming/inheritance/v1.0/BookShop.java b/objectorientedprogramming/inheritance/v1.0/BookShop.java
@@ -0,0 +1,22 @@
+/**
+ * Testing class for Book class.
+ *
+ * @version 1.0
+ * @author L.Gobinath
+ */
+public class BookShop {
+    public static void main(String[] args) {
+        Book book = new Book();
+        book.setTitle("Hamlet");
+        book.setAuthor("William Shakespeare");
+        book.setPrice(5.95);
+
+        Magazine magazine = new Magazine();
+        magazine.setTitle("TIME");
+        magazine.setIssue("Feb. 2, 2015");
+        magazine.setPrice(0.58);
+
+        book.sell(2);
+        magazine.sell(52);
+    }
+}
diff --git a/objectorientedprogramming/inheritance/v1.0/Magazine.java b/objectorientedprogramming/inheritance/v1.0/Magazine.java
@@ -0,0 +1,74 @@
+/**
+ * Magazine class used to explain the inheritance.
+ *
+ * @version 1.0
+ * @author L.Gobinath
+ */
+public class Magazine {
+    // Title of the magazine.
+    private String title;
+    // Author of the magazine.
+    private String issue;
+    // Price of the magazine.
+    private double price;
+
+    /**
+     * Get the title.
+     * @return The title of the magazine.
+     */
+    public String getTitle() {
+        return this.title;
+    }
+
+    /**
+     * Set the title.
+     * @param title The title of the magazine.
+     */
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    /**
+     * Get the issue of the magazine.
+     * @return The issue of the magazine.
+     */
+    public String getIssue() {
+        return this.issue;
+    }
+
+    /**
+     * Set the issue of the magazine.
+     * @param issue The issue of the magazine.
+     */
+    public void setIssue(String issue) {
+        this.issue = issue;
+    }
+
+    /**
+     * Set the price.
+     * @param price Price of the magazine.
+     */
+    public void setPrice(double price) {
+        if (price > 0) {
+            this.price = price;
+        } else {
+            System.out.println("Invalid price");
+        }
+    }
+
+    /**
+     * Get the price.
+     * @return Price of the magazine.
+     */
+    public double getPrice() {
+        return this.price;
+    }
+
+    /**
+     * Print the total amount for given quantity.
+     * @param qty The quantity
+     */
+    public void sell(int qty) {
+        System.out.println("Total: $" + (qty * price));
+    }
+}
diff --git a/objectorientedprogramming/inheritance/v2.0/Book.java b/objectorientedprogramming/inheritance/v2.0/Book.java
@@ -0,0 +1,27 @@
+/**
+ * Book class used to explain the encapsulation.
+ * Book is a sub class of Publication.
+ * 
+ * @version 2.0
+ * @author L.Gobinath
+ */
+public class Book extends Publication {
+    // Author of the book.
+    private String author;
+
+    /**
+     * Get the author of the book.
+     * @return The author of the book.
+     */
+    public String getAuthor() {
+        return this.author;
+    }
+
+    /**
+     * Set the author of the book.
+     * @param author The author of the book.
+     */
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+}
diff --git a/objectorientedprogramming/inheritance/v2.0/BookShop.java b/objectorientedprogramming/inheritance/v2.0/BookShop.java
@@ -0,0 +1,22 @@
+/**
+ * Testing class for Book class.
+ * There are no changes in this class.
+ * @version 2.0
+ * @author L.Gobinath
+ */
+public class BookShop {
+    public static void main(String[] args) {
+        Book book = new Book();
+        book.setTitle("Hamlet");
+        book.setAuthor("William Shakespeare");
+        book.setPrice(5.95);
+
+        Magazine magazine = new Magazine();
+        magazine.setTitle("TIME");
+        magazine.setIssue("Feb. 2, 2015");
+        magazine.setPrice(0.58);
+
+        book.sell(2);
+        magazine.sell(52);
+    }
+}
diff --git a/objectorientedprogramming/inheritance/v2.0/Magazine.java b/objectorientedprogramming/inheritance/v2.0/Magazine.java
@@ -0,0 +1,27 @@
+/**
+ * Magazine class used to explain the inheritance.
+ * Magazine is a sub class of Publication.
+ * 
+ * @version 2.0
+ * @author L.Gobinath
+ */
+public class Magazine extends Publication {
+    // Author of the magazine.
+    private String issue;
+
+    /**
+     * Get the issue of the magazine.
+     * @return The issue of the magazine.
+     */
+    public String getIssue() {
+        return this.issue;
+    }
+
+    /**
+     * Set the issue of the magazine.
+     * @param issue The issue of the magazine.
+     */
+    public void setIssue(String issue) {
+        this.issue = issue;
+    }
+}
diff --git a/objectorientedprogramming/inheritance/v2.0/Publication.java b/objectorientedprogramming/inheritance/v2.0/Publication.java
@@ -0,0 +1,56 @@
+/**
+ * Publication super class used to explain the inheritance.
+ * 
+ * @version 2.0
+ * @author L.Gobinath
+ */
+public class Publication {
+    // Title of the publication.
+    private String title;
+    // Price of the publication.
+    private double price;
+
+    /**
+     * Get the title.
+     * @return The title of the publication.
+     */
+    public String getTitle() {
+        return this.title;
+    }
+
+    /**
+     * Set the title.
+     * @param title The title of the publication.
+     */
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    /**
+     * Set the price.
+     * @param price Price of the publication.
+     */
+    public void setPrice(double price) {
+        if (price > 0) {
+            this.price = price;
+        } else {
+            System.out.println("Invalid price");
+        }
+    }
+
+    /**
+     * Get the price.
+     * @return Price of the publication.
+     */
+    public double getPrice() {
+        return this.price;
+    }
+
+    /**
+     * Print the total amount for given quantity.
+     * @param qty The quantity
+     */
+    public void sell(int qty) {
+        System.out.println("Total: $" + (qty * price));
+    }
+}
