public static void main(String[] args) {

List<String> arrayList=new ArrayList<String>();

arrayList.add("chennai");

arrayList.add(0, "karur");

arrayList.add("Harur");

arrayList.add("Harur");

arrayList.add("Null");

System.out.println(arrayList);//[karur, chennai, Harur, Harur, Null]

System.out.println(arrayList.get(1));//chennai

System.out.println(arrayList.indexOf("Harur"));//2

System.out.println(arrayList.lastIndexOf("Harur"));//3

System.out.println(arrayList.indexOf("erode"));//-1

List<String> arrayList1=new ArrayList<String>();

arrayList1.addAll(arrayList);// To copy arrayList

System.out.println(arrayList1);//[karur, chennai, Harur, Harur, Null]

arrayList1.clear();

System.out.println(arrayList1);//[]

arrayList.remove(0);//Based on Index

arrayList.remove("Harur");// Based on Object

System.out.println(arrayList);//[chennai, Harur, Null]

arrayList.set(2,"karur");//To update existing Element

System.out.println(arrayList);//[chennai, Harur, karur]

System.out.println(arrayList.isEmpty());//false

//Iterate Using ForEach loop

for (String string : arrayList) {

System.out.println(string);

}

// Iterate Using For Loop

for (int i = 0; i < arrayList.size(); i++) {

System.out.println(arrayList.get(i));

}

// Iterate the elements Using Interface "ListIterator"

ListIterator<String> iterate=arrayList.listIterator();

while(iterate.hasNext()) {

System.out.println(iterate.next());

}

while(iterate.hasPrevious()) {

System.out.println(iterate.previous());

}

//Iterate the elements Using Interface "Iterator"

Iterator<String> iterator1=arrayList.iterator();

//It has No Previos

while(iterator1.hasNext()) {

System.out.println(iterator1.next());

}

}