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Stack in java

In stack, we save elements in last-in, first-out manner. Stack extends the Vector class and have only one constructor that is default. By this default constructor, we can create an empty stack. Below is the example. public class Exampl...

HashSet in Java

Here I am writing a way to implement Hashset. HashSet creates hashtable to store the data. As it implements Set interface so it doesnt contains duplicate elements. It also extends AbstractSet class. We can implement HashSet by using different...

Enumeration Interface in Java

Enumeration is used to retrieve or traverse all the elements of particular collection of objects. Its not considered for collections but we can use it for legacy like Vectors. To use it we need to import - Java.util.Enumeration Below is the ...

Iterator in Java

In collection, there would be many situations where we need to retrieve the collection elements. Example, we need to show each element. For these situations Iterator is the best solution. How it implements :- First iterator comes to start p...
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