Develop

.gitignore

@@ -18,6 +18,7 @@
 *.zip
 *.tar.gz
 *.rar
+*.iml
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
@@ -31,5 +32,6 @@ replay_pid*
 /.vscode/settings.json
 /.idea/vcs.xml
 /.idea/uiDesigner.xml
-/out
-/.idea
+
+# Resources file
+resources/*

resources/introduction/info.txt

@@ -0,0 +1 @@
+Hello some will come to check if I exists.

src/dates/exercises/Exercise1.java

@@ -1,6 +1,7 @@
 package dates.exercises;
 
 import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
 
 /**
  * Exercise 1: Basic Date and Time Operations
@@ -16,16 +17,22 @@
  */
 public class Exercise1 {
     public static void main(String[] args) {
-        // TODO: Task 1 - Create your birthday
-        LocalDate birthday = null; // Replace with your birthday
+        // Task 1 - Create your birthday
+        LocalDate birthday = LocalDate.of(1970,10,16);
 
-        // TODO: Task 2 - Print formatted birthday message
+        // Task 2 - Print formatted birthday message
+        DateTimeFormatter f = DateTimeFormatter.ofPattern("EEEE dd MMMM Y");
+        System.out.println("I'm born a " + birthday.format(f));
 
 
-        // TODO: Task 3 - Check if leap year
+        // Task 3 - Check if leap year
+        String response = birthday.isLeapYear() ? "My birthday is a leap year.": "My birthday is NOT a leap year.";
+        System.out.println(response);
 
 
-        // TODO: Task 4 - Print day of year you were born
-
+        // Task 4 - Print day of year you were born
+        System.out.println("I'm born the " + birthday.getDayOfYear() + "th day of the year " + birthday.getYear());
+        System.out.println("It was a "+ birthday.getDayOfWeek() + ".");
+
     }
 }

src/dates/exercises/Exercise2.java

@@ -1,5 +1,9 @@
 package dates.exercises;
 
+import java.time.LocalDate;
+import java.time.Period;
+import java.time.temporal.TemporalAdjusters;
+
 /**
  * Exercise 2: Date Arithmetic
  * 
@@ -17,28 +21,54 @@
  */
 public class Exercise2 {
     public static void main(String[] args) {
-        // TODO: Task 1 - Create today's date
-
-
-        // TODO: Task 2 - Sprint 1 deadline (7 days)
-
-
-        // TODO: Task 3 - Sprint 2 deadline (2 weeks)
-
-
-        // TODO: Task 4 - Mid-project review (1 month)
-
-
-        // TODO: Task 5 - Project end (3 months)
-
-
-        // TODO: Task 6 - Pre-planning phase (15 days before today)
+        // Task 1 - Create today's date
+        LocalDate today = LocalDate.now();
+        System.out.println("Today: " + today);
+
+        // Task 2 - Sprint 1 deadline (7 days)
+        LocalDate sp1DeadLine = today.plusDays(7);
+        System.out.println("Sprint 1 deadline: " + sp1DeadLine);
+        long nbDays = sp1DeadLine.toEpochDay() - today.toEpochDay();
+        System.out.println("How many days before  Sprint 1 deadline? " + nbDays + " days.");
+        System.out.println("=".repeat(20));
+
+        // Task 3 - Sprint 2 deadline (2 weeks)
+        LocalDate sp2DeadLine = today.plusWeeks(2);
+        System.out.println("Sprint 2 deadline: " + sp2DeadLine);
+        nbDays = sp2DeadLine.toEpochDay() - today.toEpochDay();
+        System.out.println("How many days before  Sprint 2 deadline? " + nbDays + " days.");
+        System.out.println("=".repeat(20));
 
+        // Task 4 - Mid-project review (1 month)
+        LocalDate midReview = today.plusMonths(1);
+        System.out.println("Mid-project review: " + midReview);
+        nbDays = midReview.toEpochDay() - today.toEpochDay();
+        System.out.println("How many days before the Mid-project review? " + nbDays + " days.");
+        System.out.println("=".repeat(20));
+
+        // Task 5 - Project end (3 months)
+        LocalDate endOfP = today.plusMonths(3);
+        System.out.println("Project end: " + endOfP);
+        nbDays =endOfP.toEpochDay() - today.toEpochDay();
+        System.out.println("How many days before the end of the project? " + nbDays + " days.");
+        System.out.println("=".repeat(20));
 
-        // TODO: Task 7 - 2 months and 10 days from today
+        // Task 6 - Pre-planning phase (15 days before today)
+        LocalDate preP = today.minusDays(15);
+        System.out.println("Pre-planning phase: " + preP);
+        System.out.println("How many days before?" + Period.between(today,preP).getDays() + " days.");
+        System.out.println("=".repeat(20));
+
+        // Task 7 - 2 months and 10 days from today
+        LocalDate holidays = today.plusMonths(2).plusDays(10);
+        System.out.println("My holidays: " + holidays);
+        nbDays = holidays.toEpochDay() - today.toEpochDay();
+        System.out.println("How many days before my holidays? " + nbDays + " days.");
 
 
         // TODO: BONUS - Last day of next month (Hint: use TemporalAdjusters)
+       LocalDate bonus = today.plusMonths(1).with(TemporalAdjusters.lastDayOfMonth());
+        System.out.println("Last day of next month: " + (bonus.getDayOfWeek()).toString().toLowerCase());
 
     }
 }

src/dates/exercises/Exercise3.java

@@ -1,7 +1,10 @@
 package dates.exercises;
 
+import java.time.Duration;
 import java.time.LocalDate;
 import java.time.LocalTime;
+import java.time.Period;
+import java.time.temporal.TemporalAdjusters;
 
 /**
  * Exercise 3: Period and Duration Calculations
@@ -19,36 +22,58 @@
  */
 public class Exercise3 {
     public static void main(String[] args) {
-        // TODO: Task 1 - Calculate your age
-        LocalDate birthday = LocalDate.of(2000, 1, 1); // Replace with your birthday
+        // Task 1 - Calculate your age
+        LocalDate birthday = LocalDate.of(1970, 02, 16);
         LocalDate today = LocalDate.now();
-
-
-        // TODO: Task 2 - Create a method to calculate days between dates
+        int myAge = Period.between(birthday,today).getYears();
+        System.out.println("My age: " + myAge);
+
+
+        // Task 2 - Create a method to calculate days between dates
         // Call it with two different dates and print the result
-
-
-        // TODO: Task 3 - Calculate working hours
+        LocalDate nextBirthday = LocalDate.of(2027, 02, 16);
+
+        System.out.println("Number of days to wait before my birthday: " + calculateDaysBetween( today,nextBirthday));
+
+        // Task 3 - Calculate working hours
         LocalTime workStart = LocalTime.of(9, 0);
-        LocalTime workEnd = LocalTime.of(17, 30);
-
-
-        // TODO: Task 4 - Calculate actual working time (subtract 30 min lunch)
-
-
-        // TODO: Task 5 - Days until New Year 2027
+        LocalTime workEnd = LocalTime.of(17, 0);
+        Duration workDay = Duration.between(workStart,workEnd);
+        System.out.println("workDay " + workDay.toHours());
+
+        // Task 4 - Calculate actual working time (subtract 30 min lunch)
+        long init  = workDay.minusMinutes(30).getSeconds();
+        long seconds = init % 60;
+        long temp = (init - seconds) / 60;
+        long minutes = temp % 60;
+        long hours = (temp - minutes) / 60;
+        if(seconds > 0){
+            System.out.println("Actual working time: " + hours + ":" + minutes + ":" + seconds);
+        }
+        else{
+            System.out.println("Actual working time: " + hours + ":" + minutes);
+        }
+
+        // Task 5 - Days until New Year 2027
+        LocalDate newY = today.with(TemporalAdjusters.lastDayOfYear()).plusDays(1);
+        long newYdays = newY.toEpochDay() - today.toEpochDay();
+        System.out.println("Days until New Year 2027: " + newYdays);
 
 
-        // TODO: Task 6 - Add period to today
+        // Task 6 - Add period to today
+        Period toNY = Period.between(today, newY);
+        System.out.println("Add period to today: " +  today.plus(toNY));
 
 
         // TODO: BONUS - Calculate full weeks between birthday and today
+        long fullWeeks = Math.round( newYdays / 7);
+        System.out.println("Full weeks between birthday and today: " + fullWeeks );
 
     }
 
-    // TODO: Task 2 - Implement this method
+    // Task 2 - Implement this method
     public static long calculateDaysBetween(LocalDate start, LocalDate end) {
-        // Your code here
-        return 0;
+
+        return Math.abs(start.toEpochDay() - end.toEpochDay());
     }
 }

src/generics/exercises/Exercise1.java

@@ -1,5 +1,10 @@
 package generics.exercises;
 
+
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.List;
+
 /**
  * Exercise 1: Basic Generic Classes
  * 
@@ -23,61 +28,80 @@
  *    - Pair<String, Integer> for ("age", 25)
  *    - Swap it and print both pairs
  */
-public class Exercise1
-{
-    public static void main(String[] args)
-    {
-
-        Container<String> stringContainer = new Container<>("Hello");
-        Container<Integer> intContainer = new Container<>(100);
-        Container<Boolean> boolContainer = new Container<>(true);
-
-        System.out.println("String value: " + stringContainer.getValue());
-        System.out.println("Integer value: " + intContainer.getValue());
-        System.out.println("Boolean value: " + boolContainer.getValue());
-
-
-        Pair<String, Integer> agePair = new Pair<>("age", 25);
-
-        System.out.println("Original Pair: " +
-                agePair.getKey() + " = " + agePair.getValue());
-
-        Pair<Integer, String> swapped = agePair.swap();
-
-        System.out.println("Swapped Pair: " + swapped);
+public class Exercise1 {
+
+    public static void main(String[] args) {
+        System.out.println("=== Task 1 & 2: Container Class ===\n");
+
+        // Create Container instances and use them
+        Container s = new Container<String>("I am a String");
+        Container i = new Container<Integer>(456);
+        Container l = new Container<LocalDate>(LocalDate.now());
+        Container a = new Container<List>(new ArrayList<>());
+        Container n = new Container<Object>(null);
+
+        s.printValue();
+        i.printValue();
+        l.printValue();
+        a.printValue();
+        System.out.println("If this value null? " + s.isEmpty());
+        System.out.println("If this value null? " + n.isEmpty());
+
+        System.out.println("\n=== Task 3 & 4: Pair Class ===\n");
+
+        // Create Paire instances, try swap() method.
+        Paire b = new Paire("Roberta", 24);
+        System.out.println("Before swap");
+        System.out.println(b.toString());
+        Paire c = b.swap();
+        System.out.println("After swap");
+        System.out.println(c.toString());
     }
 }
 
-class Container<T> {
+// Task 1 - Create Container<T> class here
+class Container<T>{
 
-    private T value;
+    T value;
+    public Container(T value){
+        setValue(value);
 
-    public Container(T value) {
-        this.value = value;
-    }
-
-    public T getValue() {
-        return value;
     }
 
     public void setValue(T value) {
         this.value = value;
     }
-
-    public boolean isEmpty() {
-        return value == null;
+    public T getValue(){
+        return this.value;
+    }
+    public void printValue(){
+        System.out.println("Class of value: " + value.getClass());
+    }
+    //  method that returns true if value is null.
+    public boolean isEmpty(){
+        return this.value == null;
     }
 }
 
-class Pair<K, V> {
-    private K key;
-    private V value;
-
-    public Pair(K key, V value) {
-        this.key = key;
-        this.value = value;
+// Task 3 - Create Pair<K, V> class here
+class Paire<K,V>{
+    K key;
+    V value;
+    public Paire(K key, V value){
+        setKey(key);
+        setValue(value);
+    }
+    // SWAP METHOD
+    public Paire swap(){
+       return new Paire(this.getValue(), this.getKey());
+    }
+    // TOSTRING METHOD
+    @Override
+    public String toString() {
+        return "Key: " + this.getKey() + " Value: " + this.getValue();
     }
 
+    // GETTERS
     public K getKey() {
         return key;
     }
@@ -86,12 +110,12 @@ public V getValue() {
         return value;
     }
 
-    public Pair<V, K> swap() {
-        return new Pair<>(value, key);
+    // SETTERS
+    public void setKey(K key){
+        this.key = key;
     }
-
-    @Override
-    public String toString() {
-        return "K: " + this.key + ", V: " + this.value;
+    public  void setValue(V value){
+        this.value = value;
     }
-}
+
+}