Java Linked Pro

Check if a particular value exists in Java Linked Hash Map

import java.util.LinkedHashMap;

public class CheckValueOfLinkedHashMapExample

{

public static void main(String[] args)

{

LinkedHashMap lHashMap = new LinkedHashMap();

lHashMap.put("1","One");

lHashMap.put("2","Two");

lHashMap.put("3","Three");

boolean blnExists = lHashMap.containsValue("Two");

System.out.println("Two exists in LinkedHashMap ? : " + blnExists);

   }

}

Get Set view of Keys from Java Linked Hash Map

import java.util.Iterator;

import java.util.LinkedHashMap;

import java.util.Set;

public class GetSetViewOfKeysFromLinkedHashMapExample

{

public static void main(String[] args)

{

LinkedHashMap lHashMap = new LinkedHashMap();

lHashMap.put("1","One");

lHashMap.put("2","Two");

lHashMap.put("3","Three");

Set st = lHashMap.keySet();

System.out.println("Set created from LinkedHashMap Keys contains :");

Iterator itr = st.iterator();

while(itr.hasNext())

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

st.remove("2");

boolean blnExists = lHashMap.containsKey("2");

System.out.println("Does LinkedHashMap contain 2 ? " + blnExists);

     }

}

Get Size of Java Linked Hash Map

import java.util.LinkedHashMap;  

public class GetSizeOfLinkedHashMapExample

{

public static void main(String[] args)

{

LinkedHashMap lHashMap = new LinkedHashMap();

System.out.println("Size of LinkedHashMap : " + lHashMap.size());

lHashMap.put("1","One");

lHashMap.put("2","Two");

lHashMap.put("3","Three");

System.out.println("Size of LinkedHashMap after addition : " + lHashMap.size());

Object obj = lHashMap.remove("2");

System.out.println("Size of LinkedHashMap after removal : " + lHashMap.size());

   }

}

Iterate through the values of Java Linked Hash Map

import java.util.Collection;

import java.util.LinkedHashMap;

import java.util.Iterator;

public class IterateValuesOfLinkedHashMapExample

{

public static void main(String[] args)

{

LinkedHashMap lHashMap = new LinkedHashMap();

lHashMap.put("1","One");

lHashMap.put("2","Two");

lHashMap.put("3","Three");

Collection c = lHashMap.values(); Iterator itr = c.iterator();

while(itr.hasNext())

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

   }

}

Remove all values from Java Linked Hash Map

import java.util.LinkedHashMap;

public class EmptyLinkedHashMapExample

{

public static void main(String[] args)

 {

LinkedHashMap lHashMap = new LinkedHashMap();

lHashMap.put("1","One");

lHashMap.put("2","Two");

lHashMap.put("3","Three");

lHashMap.clear();

System.out.println("Total key value pairs in LinkedHashMap are : "

+ lHashMap.size());

   }

}

Remove value from Java Linked Hash Map

import java.util.LinkedHashMap;

public class RemoveValueFromLinkedHashMapExample

{

public static void main(String[] args)

{

LinkedHashMap lHashMap = new LinkedHashMap();

lHashMap.put("1","One");

lHashMap.put("2","Two");

lHashMap.put("3","Three");

Object obj = lHashMap.remove("2");

System.out.println(obj + " Removed from LinkedHashMap");

    }

}