feat(4.2.3): Finish U4_L2_Activity_Three

src/main/java/Unit4/U4_L2_Activity_Three.java

@@ -0,0 +1,50 @@
+package Unit4;
+
+import java.util.Scanner;
+
+public class U4_L2_Activity_Three {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        int anotherLocation = 1;
+        double largestLatitude = -90.0;
+        double largestLongitude = -180.0;
+        double smallestLatitude = 90.0;
+        double smallestLongitude = 180.0;
+
+        while (anotherLocation == 1) {
+            System.out.println("Please enter the longitude:");
+            double longitude = scanner.nextDouble();
+            System.out.println("Please enter the latitude:");
+            double latitude = scanner.nextDouble();
+
+            boolean longitudeIsValid = -180.0 <= longitude && longitude <= 180.0;
+            boolean latitudeIsValid = -90.0 <= latitude && latitude <= 90.0;
+
+            if (longitudeIsValid && latitudeIsValid) {
+                if (latitude > largestLatitude)
+                    largestLatitude = latitude;
+                if (latitude < smallestLatitude)
+                    smallestLatitude = latitude;
+
+                if (longitude > largestLongitude)
+                    largestLongitude = longitude;
+                if (longitude < smallestLongitude)
+                    smallestLongitude = longitude;
+
+            } else {
+                System.out.println("Incorrect Latitude or Longitude ");
+            }
+            System.out.println("Would you like to enter another location?");
+
+            anotherLocation = scanner.nextInt();
+        }
+
+        System.out.println("Farthest North: " + largestLatitude);
+        System.out.println("Farthest South: " + smallestLatitude);
+        System.out.println("Farthest East: " + largestLongitude);
+        System.out.println("Farthest West: " + smallestLongitude);
+
+        scanner.close();
+    }
+}