Main Exercise 1 completed.

src/main/java/MainExercises.java

@@ -1,28 +1,17 @@
 public class MainExercises
 {
-    /*
-    you should create a triangle with "*" and return a two-dimensional array of characters based on that
-    the triangle's area is empty, which means some characters should be " "
-
-    example 1, input = 3:
-    *
-    **
-    ***
-
-    example 2, input = 5:
-    *
-    **
-    * *
-    *  *
-    *****
-
-    the output has to be a two-dimensional array of characters, so don't just print the triangle!
- */
     public char[][] generateTriangle(int n) {
+        char[][] Triangle = new char[n][];
 
-        // todo
-        return null;
+        for(int i=0; i<n; i++) {
+            Triangle[i] = new char[i+1];
+            for (int j = 0; j <= i; j++) {
+                if (j == 0 || i == n-1 || i == j) {Triangle[i][j] = '*';}
+                else {Triangle[i][j] = ' ';}
+            }
+        }
 
+        return Triangle;
     }
 
 

src/test/java/MainTestTriangle.java

@@ -51,4 +51,4 @@ public class MainTestTriangle {
         char[][] expected = {};
         assertArrayEquals(expected, ex.generateTriangle(0));
     }
-}
+}