Update Using Generics.md

The previous solution was incorrect

Author: DavideTedesco

Diff for: tutorials/learnjavaonline.org/en/Using Generics.md

@@ -82,32 +82,32 @@ Expected Output
 
 Solution
 --------
-    import java.util.*;
-    public class Main{
-        public static class FavoriteClasses<ClassA,ClassB,ClassC>{
-            private ClassA favorite1;
-            private ClassB favorite2;
-            private ClassC favorite3;
-            FavoriteClasses(ClassA fav1, ClassB fav2, ClassC fav3){
-                this.favorite1=fav1;
-                this.favorite2=fav2;
-                this.favorite3=fav3;
-            }
-            public ClassA getFav1(){
-                return(this.favorite1);
-            }
-            public ClassB getFav2(){
-                return(this.favorite2);
-            }
-            public ClassC getFav3(){
-                return(this.favorite3);
-            }
+import java.util.*;
+public class Main{
+    public static class FavoriteClasses<ClassA,ClassB,ClassC>{
+        private ClassA favorite1;
+        private ClassB favorite2;
+        private ClassC favorite3;
+        FavoriteClasses(ClassA fav1, ClassB fav2, ClassC fav3){
+            this.favorite1=fav1;
+            this.favorite2=fav2;
+            this.favorite3=fav3;
         }
-        public static main(String[] args){
-            List<Float> r=new ArrayList<>();     //can also be double or any other that supports decimals
-            r.add(6.3);
-            r.add(5.9);
-            FavoriteClasses<String, Integer, Float> a=new FavoriteClasses<>("Hello",67,r.get(0)); //same with int
-            System.out.println("My favorites are " + a.getFav1() + ", " a.getFav2() + ", and " + a.getFav3() + ".");
+        public ClassA getFav1(){
+            return(this.favorite1);
+        }
+        public ClassB getFav2(){
+            return(this.favorite2);
         }
+        public ClassC getFav3(){
+            return(this.favorite3);
+        }
+    }
+    public static void main(String[] args){
+        List<Double> r=new ArrayList<>();     //can also be double or any other that supports decimals
+        r.add(6.3);
+        r.add(5.9);
+        FavoriteClasses<String, Integer, Double> a=new FavoriteClasses<>("Hello",67,r.get(0)); //same with int
+        System.out.println("My favorites are " + a.getFav1() + ", "+ a.getFav2() + ", and " + a.getFav3() + ".");
     }
+}