Data commit

Task/Collections/Java/collections-1.java

@@ -0,0 +1,14 @@
+List arrayList = new ArrayList();
+arrayList.add(new Integer(0));
+// alternative with primitive autoboxed to an Integer object automatically
+arrayList.add(0);
+
+//other features of ArrayList
+//define the type in the arraylist, you can substitute a proprietary class in the "<>"
+List<Integer> myarrlist = new ArrayList<Integer>();
+
+//add several values to the arraylist to be summed later
+int sum;
+for(int i = 0; i < 10; i++) {
+    myarrlist.add(i);
+}

Task/Collections/Java/collections-2.java

@@ -0,0 +1,4 @@
+//loop through myarrlist to sum each entry
+for ( i = 0; i < myarrlist.size(); i++) {
+    sum += myarrlist.get(i);
+}

Task/Collections/Java/collections-3.java

@@ -0,0 +1,3 @@
+for(int i : myarrlist) {
+    sum += i;
+}

Task/Collections/Java/collections-4.java

@@ -0,0 +1,5 @@
+//remove the last entry in the ArrayList
+myarrlist.remove(myarrlist.size()-1)
+
+//clear the ArrayList
+myarrlist.clear();

Task/Collections/Java/collections-5.java

@@ -0,0 +1,50 @@
+import scala.Tuple2;
+import scala.collection.concurrent.TrieMap;
+import scala.collection.immutable.HashSet;
+import scala.collection.mutable.ArrayBuffer;
+
+public class Collections {
+
+	public static void main(String[] args) {
+		ArrayBuffer<Integer> myarrlist = new ArrayBuffer<Integer>();
+		ArrayBuffer<Integer> myarrlist2 = new ArrayBuffer<Integer>(20);
+
+		myarrlist.$plus$eq(new Integer(42)); // $plus$eq is Scala += operator
+		myarrlist.$plus$eq(13); // to add an element.
+		myarrlist.$plus$eq(-1);
+
+		myarrlist2 = (ArrayBuffer<Integer>) myarrlist2.$minus(-1);
+
+		for (int i = 0; i < 10; i++)
+			myarrlist2.$plus$eq(i);
+
+		// loop through myarrlist to sum each entry
+		int sum = 0;
+		for (int i = 0; i < myarrlist2.size(); i++) {
+			sum += myarrlist2.apply(i);
+		}
+		System.out.println("List is: " + myarrlist2 + " with head: "
+				+ myarrlist2.head() + " sum is: " + sum);
+		System.out.println("Third element is: " + myarrlist2.apply$mcII$sp(2));
+
+		Tuple2<String, String> tuple = new Tuple2<String, String>("US",
+				"Washington");
+		System.out.println("Tuple2 is : " + tuple);
+
+		ArrayBuffer<Tuple2<String, String>> capList = new ArrayBuffer<Tuple2<String, String>>();
+		capList.$plus$eq(new Tuple2<String, String>("US", "Washington"));
+		capList.$plus$eq(new Tuple2<String, String>("France", "Paris"));
+		System.out.println(capList);
+
+		TrieMap<String, String> trieMap = new TrieMap<String, String>();
+		trieMap.put("US", "Washington");
+		trieMap.put("France", "Paris");
+
+		HashSet<Character> set = new HashSet<Character>();
+
+		ArrayBuffer<Tuple2<String, String>> capBuffer = new ArrayBuffer<Tuple2<String, String>>();
+		trieMap.put("US", "Washington");
+
+		System.out.println(trieMap);
+	}
+}