Add Streams

src/se/edu/inclass/Main.java

@@ -16,13 +16,14 @@ public static void main(String[] args) {
         DataManager dm = new DataManager("./data/data.txt");
         ArrayList<Task> tasksData = dm.loadData();
 
-        printData(tasksData);
         System.out.println();
         System.out.println("Printing deadlines");
+        //printDeadlines(tasksData);
         printDeadlines(tasksData);
 
-        System.out.println("Total number of deadlines: " + countDeadlines(tasksData));
-
+        System.out.println("Total number of deadlines: " + countDeadlinesUsingStreams(tasksData));
+        //printData(tasksData);
+        //printDataUsingStream(tasksData);
     }
 
     private static int countDeadlines(ArrayList<Task> tasksData) {
@@ -36,16 +37,35 @@ private static int countDeadlines(ArrayList<Task> tasksData) {
     }
 
     public static void printData(ArrayList<Task> tasksData) {
+        System.out.println("Print data using iteration:");
         for (Task t : tasksData) {
             System.out.println(t);
         }
     }
+    public static void printDataUsingStream(ArrayList<Task> tasks) {
+
+        tasks.parallelStream()      //convert to 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> tasks) {
+        System.out.println("Print deadlines using streams");
+        tasks.stream()
+                .filter(t -> t instanceof Deadline) //filter takes a predicate/condition
+                .forEach(System.out::println);
+    }
+
+    public static int countDeadlinesUsingStreams(ArrayList<Task> tasks) {
+        int count = (int) tasks.stream()
+                .filter(t -> t instanceof Deadline)
+                .count();
+        return count;
+    }
 }