Create 6B. Create a list

Week 3: Objects, files and exceptions/6B. Create a list

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+Write the method
+
+ArrayList<Integer> createList(int start, int end)
+
+...which takes as parameters the start and end values of the list. 
+The method generates a new list containing, in order, all the elements between the given points, one step apart. 
+As usual, the START sub-item is INCLUDED in the list, but the END sub-item IS NOT.
+
+Note that the list must be created BACKWARDS IF the STARTING sub-item is GREATER than the ending sub-item. 
+See the sample performances for an example.
+
+
+Examples on method calls:
+public static void main(String[] parameters){
+    System.out.println(createList(1,10));
+    System.out.println(createList(10,1));
+}
+
+Program outputs:
+[1, 2, 3, 4, 5, 6, 7, 8, 9]
+[10, 9, 8, 7, 6, 5, 4, 3, 2]
+
+
+
+===============================
+
+
+
+import java.util.Random;
+import java.util.ArrayList;
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+        
+        
+        Object[][] p = {{1,4}, {100,106}, {5,0}, {90,80}};
+        for (Object[] pa : p) {
+            System.out.print("Testing with parameters ");
+            System.out.println(pa[0] + ", " + pa[1]);
+            System.out.println(createList((Integer) pa[0], (Integer) pa[1]));
+            System.out.println("");
+        }
+    }
+
+
+    public static ArrayList<Integer> createList(int start, int end) {
+        ArrayList<Integer> list = new ArrayList<>();
+        // ascending order
+        if (start < end) {
+            for (int i = start; i < end; i++) {
+                list.add(i);
+            }
+        }
+        // start > end
+        // descending order
+        // start >> start-1 >> ... >> (excluding) 'end'
+        else {
+            for (int i = start; i > end; i--) {
+                list.add(i);
+            }
+        }
+        return list;
+    }
+
+
+    
+
+
+
+}
+
+
+
+
+
+
+Testing with parameters 1, 4
+[1, 2, 3]
+
+Testing with parameters 100, 106
+[100, 101, 102, 103, 104, 105]
+
+Testing with parameters 5, 0
+[5, 4, 3, 2, 1]
+
+Testing with parameters 90, 80
+[90, 89, 88, 87, 86, 85, 84, 83, 82, 81]
+
+
+
+