wrote psedo code for varius functions, create new function to extract numbers from a string - get numbers

Calculations.java

@@ -78,11 +78,23 @@ public class Calculations
         //return result;
     }
     
+    public static ArrayList<Double> getNumbers(String userInput){
+        ArrayList<Double> results = new ArrayList<Double>();
+        //takes in a string
+        //finds the first occurence of a number
+        //store it as a double ( left )
+        //add this to the arraylist
+        //find the second occurence of a number
+        //store it as a double (right)
+        //add this to the array list
+        //if the size of the arraylist is 2
+            //return the array list
+        //else return null
+        return results;
+    }
+    
     public static String Multiply(String userInput)
     {
-        //take in a string
-        //take the numbers out of the string
-        //convert them to doubles
         //perform the operation
         //convert to string
         //return string
@@ -91,9 +103,6 @@ public class Calculations
 
     public static String Divide(String userInput)
     {
-        //take in a string
-        //take the numbers out of the string
-        //convert them to doubles
         //perform the operation
         //convert to string
         //return string
@@ -102,9 +111,6 @@ public class Calculations
 
         public static String Add(String userInput)
     {
-        //take in a string
-        //take the numbers out of the string
-        //convert them to doubles
         //perform the operation
         //convert to string
         //return string
@@ -113,9 +119,6 @@ public class Calculations
     
     public static String Subtract(String userInput)
     {
-        //take in a string
-        //take the numbers out of the string
-        //convert them to doubles
         //perform the operation
         //convert to string
         //return string
@@ -124,9 +127,6 @@ public class Calculations
  
     public static String InvertSign(String userInput)
     {
-        //take in a string
-        //take the numbers out of the string
-        //convert them to doubles
         //perform the operation
         //convert to string
         //return string
@@ -135,9 +135,6 @@ public class Calculations
     
     public static String InvertNumber(String userInput)
     {
-        //take in a string
-        //take the numbers out of the string
-        //convert them to doubles
         //perform the operation
         //convert to string
         //return string
@@ -146,11 +143,6 @@ public class Calculations
 
     public static void Clear()
     {
-        //take in a string
-        //take the numbers out of the string
-        //convert them to doubles
-        //perform the operation
-        //convert to string
-        //return string
+        //reset the default value to 0
     }
 }