changed the file structure

Code/Steiner/2dArrays/src/App.java

@@ -0,0 +1,35 @@
+public class App {
+
+    public static void main(String[] args) {
+        int[][] matrix1 = {
+                // x 0 1 2
+                { 1, 2, 3 }, // 0
+                { 4, 5, 6 }, // 1
+                { 7, 8, 9 } // 2 y
+        };
+
+        int[][] matrix2 = {
+                { 9, 8, 7 },
+                { 6, 5, 4 },
+                { 3, 2, 1 }
+        };
+
+        System.out.println(matrix1[1][2]);
+        System.out.println(matrix2[1][2]);
+
+        int[][] sumMatrix = new int[matrix1.length][matrix1.length];
+
+        for (int i = 0; i < matrix1.length; i++) {
+            for (int j = 0; j < matrix1[i].length; j++) {
+                sumMatrix[j][i] = matrix1[j][i] + matrix2[j][i];
+            }
+        }
+
+        for (int i = 0; i < matrix1.length; i++) {
+            for (int j = 0; j < matrix1[i].length; j++) {
+                System.out.print(sumMatrix[i][j] + " ");
+            }
+            System.out.println("");
+        }
+    }
+}