Java Hash Set Pro

Simple Java Linked Hash Set

import java.util.LinkedHashSet;

public class SimpleLinkedHashSetExample

{

public static void main(String[] args)

{

LinkedHashSet lhashSet = new LinkedHashSet();

lhashSet.add(new Integer("1"));

lhashSet.add(new Integer("2"));

lhashSet.add(new Integer("3"));

System.out.println("LinkedHashSet contains.." + lhashSet);  

   }

}

Add elements at beginning and end of Linked List Java

import java.util.LinkedList;   

public class AddElementsAtStartEndLinkedListExample

{

public static void main(String[] args)

{

LinkedList lList = new LinkedList();

lList.add("1");

lList.add("2");

lList.add("3");

lList.add("4");

lList.add("5");

System.out.println("LinkedList contains : " + lList);

lList.addFirst("0");

System.out.println("After inserting 0 at beginning, LinkedList contains :"

+ lList);

lList.addLast("6");

System.out.println("After appending 0 at end, LinkedList contains :" + lList);

  }

}

Check if a particular element exists in Linked List Java

import java.util.LinkedList;

public class CheckElementLinkedListExample

{

public static void main(String[] args)

{

LinkedList lList = new LinkedList();

lList.add("1");

lList.add("2");

lList.add("3");

lList.add("4");

lList.add("5");

boolean blnElement = lList.contains("4");

if(blnElement)

{

System.out.println("LinkedList contains 4");

}

else

{

System.out.println("LinkedList does not contain 4");

     }

  }

}

Create an object array from elements of Linked List Java

import java.util.LinkedList;

public class ObjectArrayFromElementsOfLinkedListExample

{

public static void main(String[] args)

{

LinkedList lList = new LinkedList();

lList.add("1");

lList.add("2");

lList.add("3");

lList.add("4");

lList.add("5");

Object[] objArray = lList.toArray();

System.out.println("Object array created from Java LinkedList.");

System.out.println("Object array contains : ");

for(int i=0; i

{

System.out.println(objArray[i]);

     }

   }

}

Get Sub List from Linked List Java

import java.util.LinkedList;

import java.util.List; 

public class GetSubListLinkedListJavaExample

{

public static void main(String[] args)

{

LinkedList lList = new LinkedList();

lList.add("1");

lList.add("2");

lList.add("3");

lList.add("4");

lList.add("5");

System.out.println("LinkedList contains : " + lList);

List lst = lList.subList(1,4);

System.out.println("Sublist contains : " + lst);

lst.remove(2);

System.out.println("Sublist now contains : " + lst);

System.out.println("Original LinkedList now contains : " + lList);

   }

}

Get elements from Linked List Java

import java.util.LinkedList;

public class GetElementsLinkedListExample

{

public static void main(String[] args)

{

LinkedList lList = new LinkedList();

lList.add("1");

lList.add("2");

lList.add("3");

lList.add("4");

lList.add("5");

System.out.println("LinkedList contains : ");

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

{

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

    }

  }

}

Get first and last elements from Linked List Java

import java.util.LinkedList;

public class GetFirstAndLastElementLinkedListExample

{

public static void main(String[] args)

{

LinkedList lList = new LinkedList();

lList.add("1");

lList.add("2");

lList.add("3");

lList.add("4");

lList.add("5");

System.out.println("First element of LinkedList is : " + lList.getFirst());

System.out.println("Last element of LinkedList is : " + lList.getLast());

    }

}