how to create a Linked HashSet using collections in java
how to create a Linked HashSet using collections in java
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In this example we will create a LinkedHashSet.
For creating a LinkedHashSet we have to import the java.util package. The java.util.LinkedHashSet contains various constructors for creating a LinkedHashSet. In this example we have created a class name CollectionExample in which we have created a LinkedHashSet and then added some elements to it.
In this example we have used the add(Object obj) method for adding the elements to the LinkedHashSet.
The syntax of the add(Object obj) method is,
boolean add(Object obj)
This method returns false if the element is in the LinkedHashSet else it will add the element to the LinkedHashSet.
In this example we have created a LinkedHashSet and used the add(Object obj) method on the object of the LinkedHashSet for adding the elements to the LinkedHashSet. Finally we have displayed the contents of the LinkedHashSet.
package r4r.co.in;
import java.util.*;
public class CollectionExample {
/**
* @param args
*/
public static void main(String[] args) throws ClassCastException, NullPointerException
{
// TODO Auto-generated method stub
try
{
LinkedHashSet<Double> lnkdhaset=new LinkedHashSet<Double>();
lnkdhaset.add(2.345);
lnkdhaset.add(4.567);
lnkdhaset.add(8.976);
lnkdhaset.add(6.758);
lnkdhaset.add(6.809);
System.out.println("The contents of the setar:"+lnkdhaset);
}
catch(ClassCastException e)
{
e.printStackTrace();
}
catch(NullPointerException e)
{
e.printStackTrace();
}
}
}
The output of the above program is as follows:
The contents of the setar:[2.345, 4.567, 8.976, 6.758, 6.809]
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