diff --git a/patterns/java/ConcatenationArray.java b/patterns/java/ConcatenationArray.java
new file mode 100644
index 0000000..a4cbf41
--- /dev/null
+++ b/patterns/java/ConcatenationArray.java
@@ -0,0 +1,25 @@
+//1929. Concatenation of Array
+class Solution {
+    public int[] getConcatenation(int[] nums) {
+        int b = nums.length;  
+        int [] numeros = new int[b*2];
+        int j = 0;
+        for(int i = 0; i< b *2; i++){
+            
+            if(i<b){
+            numeros[i] = nums[j];
+            j++;
+            continue;
+            }
+            if(j == b){
+                j = 0;
+            }
+                numeros[i] = nums[j];
+                j++;
+                continue;
+            
+            
+    }
+    return numeros;
+}
+}