Merge Streams

9.18_in_class.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" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

src/se/edu/inclass/Main.java

@@ -16,11 +16,16 @@ public static void main(String[] args) {
         DataManager dm = new DataManager("./data/data.txt");
         ArrayList<Task> tasksData = dm.loadData();
 
-        System.out.println("Printing deadlines");
+//        printData(tasksData);
+//        System.out.println("Printing deadlines");
         printDeadlines(tasksData);
 
         System.out.println("Total number of deadlines: " + countDeadlines(tasksData));
 
+//        printDataUsingStreams(tasksData);
+        printDeadlinesUsingStreams(tasksData);
+
+        System.out.println("Total number of deadlines using streams: " + countDeadlinesUsingStreams(tasksData));
     }
 
     private static int countDeadlines(ArrayList<Task> tasksData) {
@@ -33,17 +38,41 @@ private static int countDeadlines(ArrayList<Task> tasksData) {
         return count;
     }
 
+    public static int countDeadlinesUsingStreams(ArrayList<Task> tasksData) {
+        System.out.println("Calculating count using streams");
+        int count;
+        count = (int) tasksData.stream()
+                .filter((t) -> t instanceof Deadline)
+                .count();
+        return count;
+    }
+
     public static void printData(ArrayList<Task> tasksData) {
         for (Task t : tasksData) {
             System.out.println(t);
         }
     }
 
+    public static void printDataUsingStreams(ArrayList<Task> taskData) {
+        System.out.println("Printing data using streams");
+        taskData.stream()
+                .forEach(System.out::println);
+
+    }
+
     public static void printDeadlines(ArrayList<Task> tasksData) {
         for (Task t : tasksData) {
             if (t instanceof Deadline) {
                 System.out.println(t);
             }
         }
     }
-}
+
+    public static void printDeadlinesUsingStreams(ArrayList<Task> tasksData) {
+        System.out.println("Printing deadlines using streams");
+        tasksData.stream()
+                .filter((t) -> t instanceof Deadline)
+                .forEach(System.out::println);
+        }
+    }
+