Friday, October 31, 2014

Java array list



Get Sub List of Java Array List

import java.util.ArrayList;
import java.util.List;
public class GetSubListOfJavaArrayListExample
{
public static void main(String[] args)
{
ArrayList arrayList = new ArrayList();
arrayList.add("1");
arrayList.add("2");
arrayList.add("3");
arrayList.add("4");
arrayList.add("5");
List lst = arrayList.subList(1,3);
System.out.println("Sub list contains : ");
for(int i=0; i< lst.size() ; i++)
System.out.println(lst.get(i));
Object obj = lst.remove(0);
System.out.println(obj + " is removed from sub list");
System.out.println("After removing " + obj + " from sub list, original ArrayList contains : ");
for(int i=0; i< arrayList.size() ; i++)
System.out.println(arrayList.get(i));
   }
 }

Insert all elements of other Collection to Specified Index of Java Array List

import java.util.ArrayList;
import java.util.Vector;
public class InsertAllElementsOfOtherCollectionToArrayListExample
{
public static void main(String[] args)
{
ArrayList arrayList = new ArrayList();
arrayList.add("1");
arrayList.add("2");
arrayList.add("3");
Vector v = new Vector();
v.add("4");
v.add("5");
arrayList.addAll(1,v);
System.out.println("After inserting all elements of Vector at index 1,
ArrayList contains..");
for(int i=0; i
System.out.println(arrayList.get(i));
   }
}

Iterate through elements Java Array List using Iterator

import java.util.ArrayList;
import java.util.Iterator;
public class IterateThroughArrayListUsingIteratorExample
{
public static void main(String[] args)
{
ArrayList arrayList = new ArrayList();
arrayList.add("1");
arrayList.add("2");
arrayList.add("3");
arrayList.add("4");
arrayList.add("5");
Iterator itr = arrayList.iterator();
System.out.println("Iterating through ArrayList elements...");
while(itr.hasNext())
System.out.println(itr.next());
   }
}

Iterate through elements Java Array List using List Iterator 

import java.util.ArrayList;
import java.util.ListIterator;
public class IterateThroughArrayListUsingListIteratorExample
{
public static void main(String[] args)
{
ArrayList arrayList = new ArrayList();
arrayList.add("1");
arrayList.add("2");
arrayList.add("3");
arrayList.add("4");
arrayList.add("5");
ListIterator itr = arrayList.listIterator();
System.out.println("Iterating through ArrayList elements in forward
direction...");
while(itr.hasNext())
System.out.println(itr.next());
System.out.println("Iterating through ArrayList elements in backward
direction...");
while(itr.hasPrevious())
System.out.println(itr.previous());

   }
}

Java Array List

import java.util.ArrayList;
public class SimpleArrayListExample
{
public static void main(String[] args)
{
ArrayList arrayList = new ArrayList();
arrayList.add("1");
arrayList.add("2");
arrayList.add("3");
System.out.println("Getting elements of ArrayList");
System.out.println(arrayList.get(0));
System.out.println(arrayList.get(1));
System.out.println(arrayList.get(2));
   }
}

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