Collections – Page 13

LinkedHashSet Class in Java with Example

Last Updated: September 11, 2022 by Chaitanya Singh | Filed Under: java

Earlier we have shared tutorials on HashSet and TreeSet. LinkedHashSet is also an implementation of Set interface, it is similar to the HashSet and TreeSet… [Read More]

TreeSet Class in Java with example

Last Updated: September 11, 2022 by Chaitanya Singh | Filed Under: java

TreeSet is similar to HashSet except that it sorts the elements in the ascending order while HashSet doesn’t maintain any order. TreeSet allows null element… [Read More]

LinkedHashMap in Java

Last Updated: September 11, 2022 by Chaitanya Singh | Filed Under: java

LinkedHashMap is a Hash table and linked list implementation of the Map interface, with predictable iteration order. This implementation differs from HashMap in that it… [Read More]

How to compare two ArrayList in Java

Last Updated: September 11, 2022 by Chaitanya Singh | Filed Under: java

In this tutorial we will learn how to compare two ArrayList. We would be using contains() method for comparing two elements of different ArrayList. public… [Read More]

How to override toString method for ArrayList in Java

Last Updated: September 11, 2022 by Chaitanya Singh | Filed Under: java

When we are dealing with ArrayList of Objects then it is must to Override the toString() method in order to get the output in desired… [Read More]

HashSet in Java With Examples

Last Updated: September 23, 2022 by Chaitanya Singh | Filed Under: java

This class implements the Set interface, backed by a hash table (actually a HashMap instance). It does not guarantee the iteration order of the set…. [Read More]

How to serialize ArrayList in java

Last Updated: September 11, 2022 by Chaitanya Singh | Filed Under: java

ArrayList is serializable by default. This means you need not to implement Serializable interface explicitly in order to serialize an ArrayList. In this tutorial we will learn how… [Read More]

Difference between ArrayList and HashMap in Java

Last Updated: September 11, 2022 by Chaitanya Singh | Filed Under: java

ArrayList and HashMap are two commonly used collection classes in Java. Even though both are the part of collection framework, the way they store and… [Read More]

How to join/combine two ArrayLists in java

Last Updated: September 11, 2022 by Chaitanya Singh | Filed Under: java

In this tutorial we will see how to join (or Combine) two ArrayLists in Java. We will be using addAll() method to add both the… [Read More]

How to find length of ArrayList in Java

Last Updated: September 11, 2022 by Chaitanya Singh | Filed Under: java

You can find the length (or size) of an ArrayList in Java using size() method. The size() method returns the number of elements present in… [Read More]