CurrencyConverter Lab Complete

src/main/java/io/zipcoder/currencyconverterapplication/ConvertableCurrency.java

@@ -2,6 +2,6 @@
 
 public interface ConvertableCurrency {
     default Double convert(CurrencyType currencyType) {
-        return Double.MAX_VALUE;
+        return currencyType.getRate() / CurrencyType.getTypeOfCurrency(this).getRate();
     }
 }

src/main/java/io/zipcoder/currencyconverterapplication/CurrencyConverter.java

@@ -1,6 +1,7 @@
 package io.zipcoder.currencyconverterapplication;
 
-public class CurrencyConverter {
+public class CurrencyConverter implements ConvertableCurrency{
+
     public static Double convert(Double amountOfBaseCurrency, ConvertableCurrency sourceCurrencyType, CurrencyType targetCurrencyType) {
         return sourceCurrencyType.convert(targetCurrencyType) * amountOfBaseCurrency;
     }

src/main/java/io/zipcoder/currencyconverterapplication/CurrencyType.java

@@ -1,6 +1,7 @@
 package io.zipcoder.currencyconverterapplication;
 
 public enum CurrencyType {
+
     AUSTRALIAN_DOLLAR(2.70),
     CANADIAN_DOLLAR(2.64),
     CHINESE_YR(13.84),
@@ -25,6 +26,14 @@ public Double getRate() {
     }
 
     public static CurrencyType getTypeOfCurrency(ConvertableCurrency currency) {
+
+        for(CurrencyType currencyType : CurrencyType.values()){
+            String currencyTypeName = currencyType.name().replace("_", "");
+            String convertableCurrencyName = currency.getClass().getSimpleName();
+            if(currencyTypeName.equalsIgnoreCase(convertableCurrencyName)) {
+                return currencyType;
+            }
+        }
         return null;
     }
 }