Streams

.gitignore

@@ -22,3 +22,4 @@
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
 .idea/
+TaskS.iml

src/se/edu/inclass/Main.java

@@ -5,6 +5,7 @@
 import se.edu.inclass.task.Task;
 import se.edu.inclass.task.TaskNameComparator;
 
+import java.lang.reflect.Array;
 import java.util.ArrayList;
 
 public class Main {
@@ -16,13 +17,17 @@ 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);
+        printDeadlinesUsingStreams(tasksData);
 
-        System.out.println("Total number of deadlines: " + countDeadlines(tasksData));
+        System.out.println("Total number of deadlines counted" +
+                " using streams: " + countDeadlinesUsingStream(tasksData));
 
+//        printData(tasksData);
+//        printDataUsingStreams(tasksData);
     }
 
     private static int countDeadlines(ArrayList<Task> tasksData) {
@@ -34,18 +39,39 @@ private static int countDeadlines(ArrayList<Task> tasksData) {
         }
         return count;
     }
+    private static int countDeadlinesUsingStream(ArrayList<Task> tasks) {
+        int count = (int) tasks.stream()
+                .filter(t -> t instanceof Deadline)
+                .count();
+        return count;
+    }
 
     public static void printData(ArrayList<Task> tasksData) {
+        System.out.println("Printing data using iteration");
         for (Task t : tasksData) {
             System.out.println(t);
         }
     }
 
+    public static void printDataUsingStreams(ArrayList<Task> tasks) {
+        System.out.println("Printing data using streams");
+        tasks.stream()              // convert to stream
+                .forEach(System.out::println);
+    }
+
     public static void printDeadlines(ArrayList<Task> tasksData) {
+        System.out.println("Printing deadline using iteration");
         for (Task t : tasksData) {
             if (t instanceof Deadline) {
                 System.out.println(t);
             }
         }
     }
+
+    public static void printDeadlinesUsingStreams(ArrayList<Task> tasks) {
+        System.out.println("Printing deadline using streams");
+        tasks.stream()
+                .filter(t -> t instanceof Deadline)
+                .forEach(System.out::println);
+    }
 }

src/se/edu/inclass/data/DataManager.java

@@ -57,7 +57,7 @@ public ArrayList<Task> loadData() {
             ArrayList<String> dataItems = readFile();
             taskList = parse(dataItems);
         } catch (IOException e) {
-            e.printStackTrace();
+            System.out.println("File access issue. Please check.");;
         }
         return taskList;
     }