memory update

Calculator.java

@@ -9,6 +9,8 @@ public class Calculator
 {
     public static void  runCommandLoop() {
         Display display = new Display();
+        Memory memory = new Memory();
+        memory.resetMemory();
         String initial = Console.getStringInput("Enter number");
         display.setDisplay(initial);
         while (true) {  
@@ -86,6 +88,19 @@ public class Calculator
                 Console.println(Double.toString(out));
                 display.setDisplay(Double.toString(out));
             }
+            if (command.equalsIgnoreCase("m+")) {
+                memory.addMemory(display.getDisplay());
+                display.setDisplay(memory.recallMemory());
+                Console.println(display.getDisplay());
+            }
+            if (command.equalsIgnoreCase("mrc")) {
+                Console.println(memory.recallMemory());
+                display.setDisplay(memory.recallMemory());
+            }
+            if (command.equalsIgnoreCase("mc")) {
+                memory.resetMemory();
+                Console.println(display.getDisplay());
+            }
             /*String s = Console.getStringInput("Enter a string");
             Integer i = Console.getIntegerInput("Enter an integer");
             Double d = Console.getDoubleInput("Enter a double.");

Display.java

@@ -12,14 +12,13 @@ public class Display
     public String getDisplay() {
         return displayValue;
     }
-
     
     public void setDisplay(String prompt) {
         displayValue = prompt;
     }
     
     public void resetDisplay(String prompt) {
-        displayValue = prompt;
+        displayValue = "0";
     }
     
 }

Memory.java

@@ -7,27 +7,18 @@
  */
 public class Memory
 {
-    // instance variables - replace the example below with your own
-    private int x;
 
-    /**
-     * Constructor for objects of class Memory
-     */
-    public Memory()
-    {
-        // initialise instance variables
-        x = 0;
-    }
+    private String memoryValue;
 
-    /**
-     * An example of a method - replace this comment with your own
-     *
-     * @param  y  a sample parameter for a method
-     * @return    the sum of x and y
-     */
-    public int sampleMethod(int y)
-    {
-        // put your code here
-        return x + y;
+    public String recallMemory() {
+        return memoryValue;
+    }
+    
+    public void addMemory(String prompt) {
+        memoryValue = Double.toString(Double.parseDouble(memoryValue) + Double.parseDouble(prompt));
+    }
+    
+    public void resetMemory() {
+        memoryValue = "0";
     }
 }