Create ArrayList.java

ArrayList.java

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+/*
+Implement an ArrayListManager which can:
+
+create(n). Create an ArrayList of integers contains [0, 1, 2, ... n-1]
+clone(list). Clone a list. The cloned list should independent with the original list.
+get(list, index). Get the element on the index position of the list.
+set(list, index, val). Change the value the element of index position to given val.
+remove(list, index). Remove the element on the index position.
+indexOf(list, val). Find the first index of element that equals to val and return its index.
+Please use the methods provided by ArrayList. See documents：ArrayList Document
+*/
+
+public class ArrayListManager {
+
+    public static ArrayList<Integer> create(int n) {
+        // Write your code here
+        ArrayList<Integer> list=new ArrayList <Integer>();
+        for(int i=0;i<n;i++)
+        {
+            list.add(i);
+        }
+        return list;
+    }
+
+
+
+    public static ArrayList<Integer> clone(ArrayList<Integer> list) {
+        // Write your code here
+        ArrayList<Integer> clonelist = new ArrayList<Integer>();
+        for(Integer b:list)
+        {
+            clonelist.add(b);
+        }
+        return clonelist;
+    }
+
+
+    public static int get(ArrayList<Integer> list, int k) {
+        // Write your code here
+        return list.get(k);
+    }
+
+
+    public static void set(ArrayList<Integer> list, int k, int val) {
+        // write your code here
+        list.set(k, val);
+    }
+
+
+    public static void remove(ArrayList<Integer> list, int k) {
+        // write tour code here
+                list.remove(k);
+    }
+
+
+    public static int indexOf(ArrayList<Integer> list, int val) {
+        // Write your code here
+        if(list == null)
+            return -1;
+        return list.indexOf(val);
+    }
+}