From 8e0d87c79a5965a8e4c9dbd1618238e42712c79b Mon Sep 17 00:00:00 2001
From: Roar <roaraf@stud.ntnu.no>
Date: Fri, 27 Mar 2026 13:37:43 +0100
Subject: [PATCH 1/2] Update Exchange

Added methods for getGainers and getLosers.
---
 .../main/java/no/ntnu/gruppe53/Exchange.java  | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/millions/src/main/java/no/ntnu/gruppe53/Exchange.java b/millions/src/main/java/no/ntnu/gruppe53/Exchange.java
index abbff58..2650963 100644
--- a/millions/src/main/java/no/ntnu/gruppe53/Exchange.java
+++ b/millions/src/main/java/no/ntnu/gruppe53/Exchange.java
@@ -143,13 +143,33 @@ public void advance() {
             }
 
             stock.addNewSalesPrice(changedPrice);
+        }
+    }
 
+    public List<Stock> getGainers(int entries) {
+        if (entries < 0) {
+            throw new IllegalArgumentException("Amount of entries in list cannot be negative.");
+        }
 
+        return stockMap.values().stream()
+                .sorted(Comparator.comparing(Stock::getLatestPriceChange).reversed())
+                .filter(stock -> stock.getLatestPriceChange().compareTo(BigDecimal.ZERO) > 0)
+                .limit(entries)
 
+                .collect(Collectors.toList());
+    }
 
+    public List<Stock> getLosers(int entries) {
+        if (entries < 0) {
+            throw new IllegalArgumentException("Amount of entries in list cannot be negative.");
         }
 
+        return stockMap.values().stream()
+                .sorted(Comparator.comparing(Stock::getLatestPriceChange))
+                .filter(stock -> stock.getLatestPriceChange().compareTo(BigDecimal.ZERO) < 0)
+                .limit(entries)
 
+                .collect(Collectors.toList());
     }
 
 

From da2fde96ebd810884ffb828e8c47d01f2e30d442 Mon Sep 17 00:00:00 2001
From: Roar <roaraf@stud.ntnu.no>
Date: Fri, 27 Mar 2026 13:42:53 +0100
Subject: [PATCH 2/2] Update Exchange

Added JavaDoc.
---
 .../src/main/java/no/ntnu/gruppe53/Exchange.java   | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/millions/src/main/java/no/ntnu/gruppe53/Exchange.java b/millions/src/main/java/no/ntnu/gruppe53/Exchange.java
index 2650963..0f729a5 100644
--- a/millions/src/main/java/no/ntnu/gruppe53/Exchange.java
+++ b/millions/src/main/java/no/ntnu/gruppe53/Exchange.java
@@ -146,6 +146,12 @@ public void advance() {
         }
     }
 
+    /**
+     * Lists the given amount of stocks sorted by highest increase in sales price since last week.
+     * @param entries amount of stocks to be shown in list
+     * @return a descending list of stocks with the highest price increase since last week
+     * @throws IllegalArgumentException if number of entries in list is negative
+     */
     public List<Stock> getGainers(int entries) {
         if (entries < 0) {
             throw new IllegalArgumentException("Amount of entries in list cannot be negative.");
@@ -159,6 +165,14 @@ public List<Stock> getGainers(int entries) {
                 .collect(Collectors.toList());
     }
 
+    /**
+     * Lists the given amount of stocks sorted by the stocks with the lowest price increase (or
+     * highest price decrease)
+     * @param entries amount of stocks to be shown in the list
+     * @return a descending list of stocks with the highest price decrease or
+     *         lowest price increase
+     * @throws IllegalArgumentException if number of entries in list is negative
+     */
     public List<Stock> getLosers(int entries) {
         if (entries < 0) {
             throw new IllegalArgumentException("Amount of entries in list cannot be negative.");