new tasks

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.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);
+}