diff --git a/src/decToBin.js b/src/decToBin.js
new file mode 100644
index 0000000..e69de29
diff --git a/src/doubleArrayElements.java b/src/doubleArrayElements.java
new file mode 100644
index 0000000..7fad3e2
--- /dev/null
+++ b/src/doubleArrayElements.java
@@ -0,0 +1,27 @@
+import java.util.ArrayList;
+
+public class array {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		ArrayList<Integer> arr = new ArrayList<Integer>();
+		arr.add(2);
+		arr.add(9);
+		arr.add(7);
+		arr.add(23);
+		arr.add(5);
+		ArrayList<Integer> doubleArr = doubleArray(arr);
+		for(int i=0; i<arr.size(); i++) {
+			System.out.println(doubleArr.get(i));
+		}
+
+	}
+
+	public static ArrayList<Integer> doubleArray(ArrayList<Integer> arr) {
+		ArrayList<Integer> res = new ArrayList<Integer>();
+		for(int i=0; i<arr.size(); i++) {
+			res.add(arr.get(i)*2);
+		}
+		return res;
+	}
+}