package jiuzhang.java.elementary;

import java.util.ArrayList;

//ArrayList

//*Note: 常用API

public class ArrayListManager {

/**

* @param n: You should generate an array list of n elements.

* @return: The array list your just created.

*/

public static ArrayList<Integer> create(int n) {

// Write your code here

ArrayList<Integer> arrayList= new ArrayList<Integer>(n); //*Note: capacity is not size

// for (int i = 0; i < n; i++) {

// arrayList.add(i);

// }

return arrayList;

}

/**

* @param list: The list you need to clone

* @return: A deep copyed array list from the given list

*/

public static ArrayList<Integer> clone(ArrayList<Integer> list) {

// Write your code here

ArrayList<Integer> arrayList= new ArrayList<Integer>(list.size());

for (Integer i: list) {

arrayList.add(i);

}

return arrayList;

}

/**

* @param list: The array list to find the kth element

* @param k: Find the kth element

* @return: The kth element

*/

public static int get(ArrayList<Integer> list, int k) {

// Write your code here

return list.get(k);

}

/**

* @param list: The array list

* @param k: Find the kth element, set it to val

* @param val: Find the kth element, set it to val

*/

public static void set(ArrayList<Integer> list, int k, int val) {

// write your code here

list.set(k, val);

}

/**

* @param list: The array list to remove the kth element

* @param k: Remove the kth element

*/

public static void remove(ArrayList<Integer> list, int k) {

// write tour code here

list.remove(k);

}

/**

* @param list: The array list.

* @param val: Get the index of the first element that equals to val

* @return: Return the index of that element

*/

public static int indexOf(ArrayList<Integer> list, int val) {

if (list == null) {

return -1; //*Note: always think about corner case, look at the parameters

}

return list.indexOf(val); //*Note: return -1 if val is not found

}

public static void main(String[] args) {

//ArrayListManager am = new ArrayListManager();

ArrayList<Integer> a = ArrayListManager.create(5);

System.out.println(a.size());

}

}