Виконані завдання з java-fundamentals-exercises

0-0-intro/src/main/java/com/bobocode/intro/ExerciseIntroduction.java

@@ -24,7 +24,8 @@ public class ExerciseIntroduction {
      */
     public String getWelcomeMessage() {
         // todo: implement a method and return a message according to javadoc
-        throw new ExerciseNotCompletedException(); 
+            return "The key to efficient learning is practice!";
+
     }
 
     /**

1-0-java-basics/1-3-0-hello-generics/src/main/java/com/bobocode/basics/Box.java

@@ -7,18 +7,18 @@
  * <p>
  * todo: refactor this class so it uses generic type "T" and run {@link com.bobocode.basics.BoxTest} to verify it
  */
-public class Box {
-    private Object value;
+public class Box<T> {
+    private T value;
 
-    public Box(Object value) {
+    public Box(T value) {
         this.value = value;
     }
 
-    public Object getValue() {
+    public T getValue() {
         return value;
     }
 
-    public void setValue(Object value) {
+    public void setValue(T value) {
         this.value = value;
     }
 }

1-0-java-basics/1-3-0-hello-generics/src/main/java/com/bobocode/basics/BoxDemoApp.java

@@ -9,13 +9,14 @@
  */
 public class BoxDemoApp {
     public static void main(String[] args) {
-        Box intBox = new Box(123);
-        Box intBox2 = new Box(321);
-        System.out.println((int) intBox.getValue() + (int) intBox2.getValue());
+        Box<Integer> intBox = new Box<>(123);
+        Box<Integer> intBox2 = new Box<>(321);
+        System.out.println(intBox.getValue() + intBox2.getValue());
 
         intBox.setValue(222);
         intBox.setValue("abc"); // this should not be allowed
         // the following code will compile, but will throw runtime exception
         System.out.println((int) intBox.getValue() + (int) intBox2.getValue());
+
     }
 }