update with latest

Book.java

@@ -0,0 +1,67 @@
+/**
+ * A class that maintains information on a book.
+ * This might form part of a larger application such
+ * as a library system, for instance.
+ *
+ * @author (Insert your name here.)
+ * @version (Insert today’s date here.)
+ */
+public class Book
+{
+    // The fields.
+    private String author; 
+    private String title;
+    private int pages;
+    private String refNumber;
+    private int borrowed;
+    /**
+     * Set the author and title fields when this object
+     * is constructed.
+     */
+
+    public Book(String bookAuthor, String bookTitle, int bookPages)
+    {
+        author = bookAuthor;
+        title = bookTitle;
+        pages = bookPages;
+        refNumber = "";
+    }
+
+    public void printAuthor(){
+        System.out.println(author);
+    }
+    
+    public void printTitle(){
+        System.out.println(title);
+    }
+    
+    public int getPages(){
+        return pages;
+    }
+    
+    public void setRefNumber(String ref){
+        if(ref.length()>=3){
+            refNumber = ref;
+        } else {
+            System.out.print("enter a ref of 3 or more characters");
+        }
+    }
+    
+    public int getBorrowed(){
+        return  borrowed;
+    }
+    
+    public void setBorrowed(String ref){
+        borrowed += 1;
+    }
+    
+    public String getRefNumber(){
+        return refNumber;
+    }
+    
+    public void printDetails(){
+        System.out.println("Title: " + title + ", Author: " + author + ", Pages: " + pages + ", Checkouts: " + borrowed);
+    }
+}
+    
+    

Heater.java

@@ -0,0 +1,71 @@
+
+/**
+ * Write a description of class Heater here.
+ *
+ * @author (your name)
+ * @version (a version number or a date)
+ */
+public class Heater
+{
+    // instance variables - replace the example below with your own
+    private int temperature;
+    private int min;
+    private int max;
+    private int increment;
+
+    /**
+     * Constructor for objects of class Heater
+     */
+    public Heater(int minTemp, int maxTemp)
+    {
+        // initialise instance variables
+        temperature = 15;
+        min = minTemp;
+        max = maxTemp;
+        increment = 5;
+    }
+
+    /**
+     * increase temperature by increment
+     */
+    public void warmer()
+    {
+        // put your code here
+        if(temperature + increment <= max){
+            temperature += increment;
+        } else {
+            System.out.print("cannot set temperature above max");
+        }
+    }
+    
+    /**
+     * decrease temperature by increment
+     */
+    public void cooler()
+    {
+        // put your code here
+        if(temperature - increment >= min){
+            temperature -= increment;
+        } else {
+            System.out.print("cannot set temperature below min");
+        }
+    }
+    
+    /**
+     * return temperature
+     */
+    public int getTemperature()
+    {
+        // put your code here
+        return temperature;
+    }
+    
+    /**
+     * increase temperature by increment
+     */
+    public void setIncrement(int newIncrement)
+    {
+        // put your code here
+        increment = newIncrement;
+    }
+}

Person.java

@@ -0,0 +1,52 @@
+
+/**
+ * Write a description of class Person here.
+ *
+ * @author (your name)
+ * @version (a version number or a date)
+ */
+public class Person
+{
+    // instance variables - replace the example below with your own
+    private String name;
+    private int age;
+    private String code;
+    private int credits;
+
+    /**
+     * Constructor for objects of class Person
+     */
+    public Person(String myName, int myAge)
+    {
+        // initialise instance variables
+        name = myName;
+        age = myAge;
+    }
+
+    /**
+     * accessor method returning name
+     */
+    public String getName()
+    {
+        // put your code here
+        return name;
+    }
+    
+    /**
+     * mutator method returning name
+     */
+    public void setAge(int myAge)
+    {
+        // put your code here
+        age = myAge;
+    }
+    
+    /**
+     * method to print details of name
+     */
+    public void printDetails()
+    {
+        // put your code here
+        System.out.println("The name of this person is " + name);
+    }
+}

Student.java

@@ -0,0 +1,95 @@
+/**
+ * The Student class represents a student in a
+ * student administration system.
+ * It holds the student details relevant in our context.
+ *
+ * @author Michael Kölling and David Barnes
+ * @version 2006.03.30
+ */
+public class Student {
+    // the student’s full name
+    private String name;
+    // the student ID
+    private String id;
+    // the amount of credits for study taken so far private int credits;
+    private int credits;
+    /**
+     * Create a new student with a given name and ID number.
+     */
+    public Student(String fullName, String studentID) {
+        name = fullName;
+        id = studentID;
+        credits = 0;
+    }
+
+    /**
+     * Return the full name of this student.
+     */
+    public String getName() {
+        return name; }
+
+    /**
+     * Set a new name for this student.
+     */
+    public void changeName(String newName) {
+        name = newName;
+    }
+
+    /**
+     * Return the student ID of this student.
+     */
+    public String getStudentID() {
+        return id; }
+
+    /**
+     * Add some credit points to the student’s
+     * accumulated credits.
+     */
+    public void addCredits(int newCreditPoints) {
+        credits += newCreditPoints;
+    }
+
+    /**
+     * Return the number of credit points this student
+     * has accumulated.
+     */
+    public int getCredits() {
+        return credits; }
+
+    /**
+     * Return the login name of this student.
+     * The login name is a combination
+     * of the first four characters of the
+     * student’s name and the first three
+     * characters of the student’s ID number.
+     */
+    public String getLoginName() {
+        if(name.length() < 4 && id.length() < 3){
+            return name + id;
+        } else if (name.length() < 4 && id.length() >= 3){
+            return name + id.substring(0,3);
+        } else if (name.length() >= 3 && id.length() <3){
+            return name.substring(0,4) + id;
+        } else {
+
+            return name.substring(0,4) + id.substring(0,3);
+        }
+    }
+
+    /**
+     * Print the student’s name and ID number
+     * to the output terminal.
+     */
+    public void print() {
+        System.out.println(name + " (" + id + ")");
+    }
+
+    /**
+     * Return the number of characters in this string.
+     */
+    public void length() {
+        if(name.length()<4 || id.length()<3){
+            System.out.println("length of name or ID are too small");    
+        }
+    }
+}

TicketMachine.java

@@ -17,19 +17,54 @@ public class TicketMachine
     private int balance;
     // The total amount of money collected by this machine.
     private int total;
+    // Exercise 2.15
+    private int status;
 
     /**
      * Create a machine that issues tickets of the given price.
      * Note that the price must be greater than zero, and there
      * are no checks to ensure this.
      */
-    public TicketMachine(int ticketCost)
+    public TicketMachine()
     {
-        price = ticketCost;
+        //2.39 set price to 1000 and remove input parameter
+        //2.42 constructor with parameter to specify price
+        //2.58 Better ticket machine
+        price = 0;
         balance = 0;
         total = 0;
     }
 
+    //public TicketMachine()
+    //{
+        //2.42 constructor with default value of price
+        //price = 500;
+    //}
+
+    /*
+     * Exercise 2.30/2.41: Assign a value to the price field
+     */
+    public void setPrice(int ticketCost)
+    {
+        price = ticketCost;
+    }
+
+    /*
+     * Exercise 2.31: Add a value to the score field
+     */
+    public void increase(int points)
+    {
+        int score = points;
+    }
+
+    /*
+     * Exercise 2.32: Subtract a value from the price field
+     */
+    public void discount(int amount)
+    {
+        price = price - amount;
+    }
+
     /**
      * Return the price of a ticket.
      */
@@ -52,7 +87,55 @@ public class TicketMachine
      */
     public void insertMoney(int amount)
     {
-        balance = balance + amount;
+        if(amount >= 0){
+            balance = balance + amount;
+        }
+    }
+
+    /**
+     * Return the total amount of money collected by this machine.
+     */
+    //Exercise 2.24
+    public int getTotal()
+    {
+        return total;
+    }
+
+    /**
+     * Print message when incorrect amount of money is inserted
+     */
+    //Exercise 2.33
+    public void prompt()
+    {
+        System.out.println("Please insert the correct amount of money.");
+    }
+
+    /**
+     * Print message showing price of a ticket
+     */
+    //Exercise 2.34
+    public void showPrice()
+    {
+        System.out.println("The price of a ticket is " + price + " cents.");
+    }
+
+    /**
+     * Print message showing price of a ticket
+     */
+    //Exercise 2.40
+    public void empty()
+    {
+        total = 0;
+    }
+
+    /**
+     * Print message showing price of a ticket
+     */
+    //Exercise 2.55
+    public int emptyMachine()
+    {
+        return total;
+        //total=0;
     }
 
     /**
@@ -62,6 +145,7 @@ public class TicketMachine
      */
     public void printTicket()
     {
+        /*
         // Simulate the printing of a ticket.
         System.out.println("##################");
         System.out.println("# The BlueJ Line");
@@ -74,5 +158,107 @@ public class TicketMachine
         total = total + balance;
         // Clear the balance.
         balance = 0;
+         */
+
+        /*
+        if(balance >= price) {
+        System.out.println("##################");
+        System.out.println("# The BlueJ Line");
+        System.out.println("# Ticket");
+        System.out.println("# " + price + " cents.");
+        System.out.println("##################");
+        System.out.println();
+        // Update the total collected with the price.
+        total = total + price;
+        // Reduce the balance by the price.
+        balance = balance - price;
+        }
+        else {
+        System.out.println("You must insert at least: " +
+        (price - balance) + " more cents.");
+        }
+         */
+
+        int amountLeftToPay = price - balance;
+
+        if(amountLeftToPay <=0){
+            System.out.println("##################");
+            System.out.println("# The BlueJ Line");
+            System.out.println("# Ticket");
+            System.out.println("# " + price + " cents.");
+            System.out.println("##################");
+            System.out.println();
+            // Update the total collected with the price.
+            total = total + price;
+            // Reduce the balance by the price.
+            balance = balance - price;
+        } else {
+            System.out.println("You must insert at least: " +
+                (price - balance) + " more cents.");
+        }
     }
+
 }
+
+/* EXERCISES
+ * 2.1: call void printTicket()
+ * 2.2: price that was entered
+ * 2.3: The ticket prints regardless
+ * 2.4: [practice ticket machine]
+ * 2.5: Yes, price is different.
+ * 2.6: public class Student; public class LabClass
+ * 2.7: Order of statement matters
+ * 2.8: It is possible to leave this out, the class will be assigned default access modifier
+ * 2.9: fields: price, balance, total; 
+ * constructors: public TicketMachine(int ticketCost); 
+ * methods: getPrice, getBalance, insertMoney, printTicket
+ * 2.10: no return type defined
+ * 2.11: int, Student, Server
+ * 2.12: alive, tutor, game
+ * 2.13: Order of statement matters
+ * 2.14: field declaration requires a semicolon
+ * 2.15: Shown in code
+ * 2.16: Student 
+ * 2.17: title of type String, and price of type double
+ * 2.18: fields: title, price, author, publisher, publish date
+ *  types: string, double, string, string, date 
+ * 2.19: name = petsName;
+ * 2.20: The problem when adding int is the ticketCost was not recognized as price
+ *  Assignments should not re-declare the field type. This needs to be done in fields section.
+ * 2.21: getPrice returns a passed value and getBalance returns a set value.
+ * 2.22: getBalance - "How much money do I owe or am I owed?"
+ * 2.23: No, the variable does not need to have the same name as the method
+ * 2.24: new getTotal method created above.
+ * 2.25: error "missing return statement"
+ * 2.26: getPrice returns an integer, printTicket does not return anything (void)
+ * 2.27: They are actions and don't return anything.
+ * 2.28: (Practicing methods)
+ * 2.29: There is a return type included
+ * 2.30-2.34: Shown in Code
+ * 2.35: Different outputs because the price is variable
+ * 2.36: "price" string would display instead of a variable
+ * 2.37: Same output as 2.36
+ * 2.38: No, they cannot show variable prices because they are outputing a string
+ * 2.39: Objects cannot pass a parameter to the ticketmachine
+ * 2.40: Mutator method
+ * 2.41: Setter method
+ * 2.42: Shown in code
+ * 2.43: (Practicing methods)
+ * 2.44: negative values do not affect balance
+ * 2.45: Booleans are well suited to be controlled by a type with only two different values
+ * 2.46: Shown in code
+ * 2.47: No because there is a check to make sure price is not greater than balance
+ * 2.48: +, -, /, *, %
+ * 2.49: saving = price * discount;
+ * 2.50: mean = total / count;
+ * 2.51: if(price > budget){System.out.print("Too expensive")}else {System.out.print("Just right")}
+ * 2.52: if(price > budget){System.out.print("Too expensive, your budget is only " + budget)}else {System.out.print("Just right")}
+ * 2.53: it is setting balance as 0 before returning it.
+ * 2.54: return statement ends the execution of a method
+ * 2.55: Shown in code
+ * 2.56: It is an accessor because method ends after return statement
+ * 2.57: Shown in code
+ * 2.58: setPrice method can be called to set price based on user selection
+ */
+
+

bluej.pkg

@@ -1,20 +1,20 @@
 #BlueJ package file
-editor.fx.0.height=722
-editor.fx.0.width=800
-editor.fx.0.x=709
-editor.fx.0.y=113
-objectbench.height=101
+editor.fx.0.height=709
+editor.fx.0.width=626
+editor.fx.0.x=619
+editor.fx.0.y=26
+objectbench.height=164
 objectbench.width=461
 package.divider.horizontal=0.6
-package.divider.vertical=0.8007380073800738
-package.editor.height=427
+package.divider.vertical=0.6845018450184502
+package.editor.height=364
 package.editor.width=674
-package.editor.x=1067
-package.editor.y=119
+package.editor.x=595
+package.editor.y=61
 package.frame.height=600
 package.frame.width=800
 package.numDependencies=0
-package.numTargets=1
+package.numTargets=5
 package.showExtends=true
 package.showUses=true
 project.charset=UTF-8
@@ -24,9 +24,37 @@ readme.width=47
 readme.x=10
 readme.y=10
 target1.height=50
-target1.name=TicketMachine
+target1.name=Book
 target1.showInterface=false
 target1.type=ClassTarget
-target1.width=120
-target1.x=80
-target1.y=50
+target1.width=80
+target1.x=220
+target1.y=120
+target2.height=50
+target2.name=Heater
+target2.showInterface=false
+target2.type=ClassTarget
+target2.width=80
+target2.x=20
+target2.y=200
+target3.height=50
+target3.name=TicketMachine
+target3.showInterface=false
+target3.type=ClassTarget
+target3.width=120
+target3.x=80
+target3.y=50
+target4.height=50
+target4.name=Student
+target4.showInterface=false
+target4.type=ClassTarget
+target4.width=80
+target4.x=120
+target4.y=120
+target5.height=50
+target5.name=Person
+target5.showInterface=false
+target5.type=ClassTarget
+target5.width=80
+target5.x=20
+target5.y=120

package.bluej

@@ -1,20 +1,20 @@
 #BlueJ package file
-editor.fx.0.height=722
-editor.fx.0.width=800
-editor.fx.0.x=709
-editor.fx.0.y=113
-objectbench.height=101
+editor.fx.0.height=709
+editor.fx.0.width=626
+editor.fx.0.x=619
+editor.fx.0.y=26
+objectbench.height=164
 objectbench.width=461
 package.divider.horizontal=0.6
-package.divider.vertical=0.8007380073800738
-package.editor.height=427
+package.divider.vertical=0.6845018450184502
+package.editor.height=364
 package.editor.width=674
-package.editor.x=1067
-package.editor.y=119
+package.editor.x=595
+package.editor.y=61
 package.frame.height=600
 package.frame.width=800
 package.numDependencies=0
-package.numTargets=1
+package.numTargets=5
 package.showExtends=true
 package.showUses=true
 project.charset=UTF-8
@@ -24,9 +24,37 @@ readme.width=47
 readme.x=10
 readme.y=10
 target1.height=50
-target1.name=TicketMachine
+target1.name=Book
 target1.showInterface=false
 target1.type=ClassTarget
-target1.width=120
-target1.x=80
-target1.y=50
+target1.width=80
+target1.x=220
+target1.y=120
+target2.height=50
+target2.name=Heater
+target2.showInterface=false
+target2.type=ClassTarget
+target2.width=80
+target2.x=20
+target2.y=200
+target3.height=50
+target3.name=TicketMachine
+target3.showInterface=false
+target3.type=ClassTarget
+target3.width=120
+target3.x=80
+target3.y=50
+target4.height=50
+target4.name=Student
+target4.showInterface=false
+target4.type=ClassTarget
+target4.width=80
+target4.x=120
+target4.y=120
+target5.height=50
+target5.name=Person
+target5.showInterface=false
+target5.type=ClassTarget
+target5.width=80
+target5.x=20
+target5.y=120