reallydone

pom.xml

          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
     <groupId>com.zipcoder</groupId>
     <artifactId>payment</artifactId>
     <version>1.0-SNAPSHOT</version>

src/main/java/com/zipcoder/payment/PaymentPresenter.java

 package com.zipcoder.payment;
 
 import java.util.Arrays;
+import java.util.Comparator;
 
 public class PaymentPresenter {
 
     public String toString(Payment[] payments){
-        Arrays.sort(payments, new PaymentSortDescription());
+        //Comparator<Payment> shortDescComp = (p1, p2) -> p1.getShortDescription().compareTo(p2.getShortDescription());
+        Comparator<Payment> shortDescComp = Comparator.comparing(Payment::getShortDescription);
+        Arrays.sort(payments, shortDescComp);
         return createArrayString(payments);
     }
 
     }
 
     public String toStringById(Payment[] payments){
-        Arrays.sort(payments, new PaymentSortID());
+        Comparator<Payment> sortByID = Comparator.comparing(Payment::getId);
+        Arrays.sort(payments, sortByID);
         return createArrayString(payments);
     }
 

src/main/java/com/zipcoder/payment/PaymentSortDescription.java

-package com.zipcoder.payment;
-import java.util.Comparator;
-
-public class PaymentSortDescription implements Comparator<Payment>{
-    public int compare(Payment o1, Payment o2) {
-        return o1.getShortDescription().compareTo(o2.getShortDescription());
-    }
-}

src/main/java/com/zipcoder/payment/PaymentSortID.java

-package com.zipcoder.payment;
-
-import java.util.Comparator;
-
-public class PaymentSortID implements Comparator<Payment> {
-
-    public int compare(Payment o1, Payment o2) {
-        return o1.getId().compareTo(o2.getId());
-    }
-}