Add Lamdas code

W7.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

src/W7.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/main/java" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

src/main/java/se/edu/streamdemo/Main.java

@@ -14,11 +14,12 @@ public static void main(String[] args) {
 
         System.out.println("Printing all data ...");
         printAllData(tasksData);
-
+        printAllDataUsingStreams(tasksData);
         System.out.println("Printing deadlines ...");
         printDeadlines(tasksData);
+        printDeadlinesUsingStreams(tasksData);
 
-        System.out.println("Total number of deadlines: " + countDeadlines(tasksData));
+        System.out.println("Total number of deadlines: " + countDeadlinesUsingStream(tasksData));
 
     }
 
@@ -32,12 +33,25 @@ private static int countDeadlines(ArrayList<Task> tasksData) {
         return count;
     }
 
+    private static int countDeadlinesUsingStream(ArrayList<Task> tasksData) {
+        int count = (int) tasksData.stream()
+                .filter((t) -> t instanceof Deadline)
+                .count();
+        return count;
+    }
     public static void printAllData(ArrayList<Task> tasksData) {
+
         for (Task t : tasksData) {
             System.out.println(t);
         }
     }
 
+    public static void printAllDataUsingStreams(ArrayList<Task> tasks) {
+        System.out.println();
+
+        tasks.stream()
+                .forEach(System.out::println);
+    }
     public static void printDeadlines(ArrayList<Task> tasksData) {
         for (Task t : tasksData) {
             if (t instanceof Deadline) {
@@ -46,4 +60,13 @@ public static void printDeadlines(ArrayList<Task> tasksData) {
         }
     }
 
+    public static void printDeadlinesUsingStreams(ArrayList<Task> tasksData) {
+        tasksData.stream()
+                .fliter((t) -> t instanceof deadline)
+                .sorted((t1, t2) -> t1.getDescription.compareToIgnoreCase(t2.getDescription))
+                .forEach(System.out::println);
+    }
+
+
+
 }