list array android

import java.util.ArrayList;

    //Integer ArrayList
ArrayList<Integer> aList = new ArrayList<Integer>();

aList.add(5);
aList.add(11);
aList.add(17);

System.out.println("Integer Number Added in ArrayList= " + aList);

//String ArrayList
ArrayList<String> sList = new ArrayList<String>();

sList.add("Learning");
sList.add("JAVA");

System.out.println("String Added in ArrayList= "+ sList);

public void ensureCapacity (int minCapacity)