diff --git a/Arrays.java b/Arrays.java
index bb7a9b3..1e4db9a 100644
--- a/Arrays.java
+++ b/Arrays.java
@@ -289,7 +289,15 @@ public class Arrays {
      * zum Beispiel <code>["+String 1","+String 2"]</code>.
      */
     public String[] prefix( String[] pArray, String pPrefix ) {
-        return null;
+       if( pArray.length == 0 ) {
+           return new String[0];
+       }
+       for(int i=0;i<pArray.length;i++){
+           
+               pArray[i]=pPrefix+pArray[i];
+           
+       }
+       return pArray;
     }
 
     /**