diff --git a/JavaUtils/src/id/ac/ub/filkom/rendicahya/utils/matrix/operators/VerticalStacker.java b/JavaUtils/src/id/ac/ub/filkom/rendicahya/utils/matrix/operators/VerticalStacker.java
index 0a60d47..f833343 100644
--- a/JavaUtils/src/id/ac/ub/filkom/rendicahya/utils/matrix/operators/VerticalStacker.java
+++ b/JavaUtils/src/id/ac/ub/filkom/rendicahya/utils/matrix/operators/VerticalStacker.java
@@ -11,4 +11,127 @@
 //          [2, 3, 4],
 //          [5, 6, 7]
 public class VerticalStacker implements TwoMatricesMapper {
+
+
+    @Override
+    public byte[][] operate(byte[][] a, byte[][] b) {
+        byte c[][] = new byte[4][3];
+        for (int i = 0; i < 2; i++) {
+            for (int j = 0; j < 3; j++) {
+                c[i][j] = a[i][j];
+                c[i + 2][j] = b[i][j];
+            }
+
+        }
+        for (int i = 0; i < 4; i++) {
+            for (int j = 0; j < 3; j++) {
+                System.out.printf("%-4s", c[i][j]);
+            }
+            System.out.println(" ");
+        }
+        return c;
+    } 
+    
+
+    @Override
+    public short[][] operate(short[][] a, short[][] b) {
+       short c[][] = new short[4][3];
+        for (int i = 0; i < 2; i++) {
+            for (int j = 0; j < 3; j++) {
+                c[i][j] = a[i][j];
+                c[i + 2][j] = b[i][j];
+            }
+
+        }
+        for (int i = 0; i < 4; i++) {
+            for (int j = 0; j < 3; j++) {
+                System.out.printf("%-4s", c[i][j]);
+            }
+            System.out.println(" ");
+        }
+        return c;
+    } 
+    
+
+    @Override
+    public int[][] operate(int[][] a, int[][] b) {
+
+        int c[][] = new int[4][3];
+        for (int i = 0; i < 2; i++) {
+            for (int j = 0; j < 3; j++) {
+                c[i][j] = a[i][j];
+                c[i + 2][j] = b[i][j];
+            }
+
+        }
+        for (int i = 0; i < 4; i++) {
+            for (int j = 0; j < 3; j++) {
+                System.out.printf("%-4s", c[i][j]);
+            }
+            System.out.println(" ");
+        }
+        return c;
+    } 
+
+
+    @Override
+    public long[][] operate(long[][] a, long[][] b) {
+         long c[][] = new long[4][3];
+        for (int i = 0; i < 2; i++) {
+            for (int j = 0; j < 3; j++) {
+                c[i][j] = a[i][j];
+                c[i + 2][j] = b[i][j];
+            }
+
+        }
+        for (int i = 0; i < 4; i++) {
+            for (int j = 0; j < 3; j++) {
+                System.out.printf("%-4s", c[i][j]);
+            }
+            System.out.println(" ");
+        }
+        return c;
+
+
+}
+
+    @Override
+public float[][] operate(float[][] a, float[][] b) {
+         float c[][] = new float[4][3];
+        for (int i = 0; i < 2; i++) {
+            for (int j = 0; j < 3; j++) {
+                c[i][j] = a[i][j];
+                c[i + 2][j] = b[i][j];
+            }
+
+        }
+        for (int i = 0; i < 4; i++) {
+            for (int j = 0; j < 3; j++) {
+                System.out.printf("%-4s", c[i][j]);
+            }
+            System.out.println(" ");
+        }
+        return c;
+
+
+}
+
+    @Override
+public double[][] operate(double[][] a, double[][] b) {
+      double c[][] = new double[4][3];
+        for (int i = 0; i < 2; i++) {
+            for (int j = 0; j < 3; j++) {
+                c[i][j] = a[i][j];
+                c[i + 2][j] = b[i][j];
+            }
+
+        }
+        for (int i = 0; i < 4; i++) {
+            for (int j = 0; j < 3; j++) {
+                System.out.printf("%-4s", c[i][j]);
+            }
+            System.out.println(" ");
+        }
+        return c;
+    }
 }