feat(2.7): finished Unit 2 Lesson 7 acitivities

.vscode/launch.json

@@ -1,5 +1,12 @@
 {
     "configurations": [
+        {
+            "type": "java",
+            "name": "U2_L7_Activity_Two",
+            "request": "launch",
+            "mainClass": "Unit2.U2_L7_Activity_Two",
+            "projectName": "my-app"
+        },
         {
             "type": "java",
             "name": "Test",

src/main/java/Unit2/U2_L7_Activity_One.java

@@ -0,0 +1,15 @@
+/* Lesson 7 Coding Activity Question 1 */
+package Unit2;
+
+public class U2_L7_Activity_One
+{
+  public static void main(String[] args)
+  {
+    Integer a = Integer.MAX_VALUE;
+    a += 1;
+    System.out.println(a);
+    Integer b = Integer.MIN_VALUE;
+    b -= 1;
+    System.out.println(b);
+  }
+}

src/main/java/Unit2/U2_L7_Activity_Three.java

@@ -0,0 +1,26 @@
+// /* Lesson 7 Coding Activity Question 3 */
+
+// import java.util.Scanner;
+// import shapes.*;
+
+// public class U2_L7_Activity_Three
+// {
+//   public static void main(String[] args)
+//   {
+
+//     Scanner scan = new Scanner(System.in);
+//     Integer sides;
+//     Double length;
+
+//     System.out.println("Enter number of sides:");
+//     sides = scan.nextInt();
+//     System.out.println("Enter side length:");
+//     length = scan.nextDouble();
+
+//     RegularPolygon p1 = new RegularPolygon(sides, length);
+//     RegularPolygon p2 = new RegularPolygon(sides+1, length*2);
+
+//     System.out.println("The area of a " + p1 + " is: " + p1.getArea());
+//     System.out.println("The area of a " + p2 + " is: " + p2.getArea());
+//   }
+// }

src/main/java/Unit2/U2_L7_Activity_Two.java

@@ -0,0 +1,25 @@
+package Unit2;
+
+import java.util.Scanner;
+
+public class U2_L7_Activity_Two
+{
+  public static void main(String[] args)
+  {
+
+    Scanner scan = new Scanner(System.in);
+    Integer x = null;
+    Integer y = null;
+
+    System.out.println("null null");
+    System.out.println("Enter values:");
+    System.out.print(">");
+    x = scan.nextInt();
+    System.out.print("\n>");
+    y = scan.nextInt();
+
+    Double avg = ((double) x + y) / 2;
+    System.out.println("Average of " + x + " and " + y + " is " + avg);
+    scan.close();
+  }
+}