Session 25

Source Code

import java.util.*;

public class Session25 {
    public static void main(String[] args) {
        System.out.println("Session 25");

        // Menu
        System.out.println("Menu");
        System.out.println("E1 - Example 1");

        // setup Scanner
        Scanner in = new Scanner(System.in);
        System.out.print("Choice: ");
        String choice = in.nextLine();

        // switch choices
        switch (choice) {
            case "E1":
                System.out.println("Example 1");
                example1();
                break;
            case "E2":
                System.out.println("Example 2");
                example2();
                break;
            case "E3":
                System.out.println("Example 3");
                example3();
                break;
            default:
                System.out.println("Invalid choice");
        }
    }

    // example1 method
    public static void example1() {
        // Three-parameter constructor: username, followers, rating
        

        // Two-parameter constructor: username, followers (rating defaults to 0.0)
       

        // One-parameter constructor: username only (followers=0, rating=0.0)
       

        // Print them
      
    }

    // example2 method
    public static void example2() {
        // Create Achievement tracker object
        

        // Create Achievement objects
     
    }

    // example3 method
    public static void example3() {
        // Create quests using different constructors
        

        // Accessing private variables requires public methods
        
        
       

  

        // Method chaining using 'this'
        
        
    }

   
}

ContentCreator.java

public class ContentCreator {
    // Private instance variables


    // Three-parameter constructor


    // Two-parameter constructor - uses default rating of 0.0
    
    
    // One-parameter constructor - uses defaults for followers and rating
    
    
}

QuestLog.java

public class QuestLog {
    // Instance variables (class scope) - private for encapsulation
    private String questName;
    private int experience;
    private int questID;
    private static int nextQuestID = 1000;  // Shared by all objects

    // Constructor with three parameters
    public QuestLog(String questName, int experience, int questID) {
        this.questName = questName;    // this required
        this.experience = experience;  // this required
        this.questID = questID;        // this required
    }

    // Constructor with two parameters - generates quest ID
    public QuestLog(String questName, int experience) {
        this(questName, experience, nextQuestID++);  // Constructor chaining
    }

    // Constructor with one parameter - default experience is 0
    public QuestLog(String questName) {
        this(questName, 0);  // Constructor chaining
    }

    // Method demonstrating local variables and scope
    public void gainExperience(int xp) {  // xp is a parameter (method scope)
        if (xp > 0) {
            // Local variable (method scope)
            int oldExperience = experience;

            // Modify instance variable
            experience = experience + xp;  // or: this.experience += xp;

            // Local variables only exist within this method
            System.out.println("Gained " + xp + " XP");
            System.out.println("Previous XP: " + oldExperience);
            System.out.println("Current XP: " + experience);
        }
        // oldExperience doesn't exist outside this method
    }

    public void checkMilestone() {
        if (experience >= 100) {
            experience -= 100;

            // Block scope example
            if (experience < 20) {
                String notice = "Almost ready for next milestone!";  // Block scope
                System.out.println(notice);
            }
            // notice doesn't exist here
        }
    }

    // Public methods to access private data (getters)
    public String getQuestName() {
        return questName;  // Could also write: return this.questName;
    }

    public int getExperience() {
        return experience;
    }

    public int getQuestID() {
        return questID;
    }

    // Method that uses 'this' to return the current object
    public QuestLog applyBonus(double multiplier) {
        experience = (int)(experience * multiplier);
        return this;  // Returns this QuestLog object
    }
}