diff --git a/java/ArrayDemo.java b/java/ArrayDemo.java
new file mode 100644
index 0000000..3b33fe9
--- /dev/null
+++ b/java/ArrayDemo.java
@@ -0,0 +1,20 @@
+package java;
+
+public class ArrayDemo{
+
+    // create a function to find the maximum element in an array
+    
+    // create a function that takes in an array of numbers and returns the sum of all the odd numbers.
+    
+    // create a function to add elements of two arrays
+
+
+    // create a main method
+    public static void main(String[] args){
+        // create an array
+
+        // print the array
+        
+    }
+
+}
\ No newline at end of file
diff --git a/java/StringDemo.java b/java/StringDemo.java
new file mode 100644
index 0000000..f3ecce9
--- /dev/null
+++ b/java/StringDemo.java
@@ -0,0 +1,19 @@
+package java;
+
+public class StringDemo {
+    
+    // create a function to reverse a string
+    
+    // create a function to check whether a string is palindrome or not
+     
+    // create a function to convert lowercase to uppercase and vice versa
+
+    
+    // create a main method
+    public static void main(String[] args) {   
+        // create a string
+    
+    }
+
+
+}