Java 8 – Sorting ArrayList using sort() method of List
In this article, we will discuss how to sort contents of ArrayList using sort() method of List in Java 8 Until Java 1.7 version: To Read More
Category: Collection
Java – Arrays v/s ArrayList
In this article, we will discuss difference between Arrays and ArrayList in detail i.e.; Arrays v/s ArrayList 1. Difference will be based on below parameters, Size Read More
Java – Collection Interview question and answers
In this article, we will cover some of the interview questions with their justification on Java Collection framework These are most frequently asked interview question Read More
Java – Ways to iterate over List of HashMap
In this article, we will discuss different ways to iterate through List of HashMap. Already, in earlier articles, we have discussed following topics Iterating over Read More
Java – Sorting list of objects on multiple fields using Comparator
In one of the previous articles, we have discussed how to sort list of objects on the basis of single field/attribute using Comparable and Comparator interfaces Read More
Java – Different ways to iterate over HashMap of ArrayList
In one of the previous articles, we already discussed different ways to iterate through Map but those are with String object only i.e.; both keys and values are Read More
Java – Iterate through Hashtable in 6 ways
In previous articles, we have discussed various ways to iterate through Map and in this article we will learn different ways to iterate through Hashtable 1. Hashtable : Read More
Java – Sorting Hashtable contents
In this article, we will discuss how to sort Hashtable contents We can sort Hashtable in both ascending and descending order, by passing Hashtable contents Read More
Java 8 – Sorting HashMap by Keys and Values using Stream
In this article, we will discuss how to sort HashMap by its Keys and Values using stream in Java 8 Prior to Java 8 release, Read More
Java – Sorting HashMap by Keys and Values
In this article, we will discuss how to sort HashMap by its Keys and Values 1. Sorting HashMap by its Keys : We can sort Read More
Java – Converting Unordered HashMap into Sorted TreeMap
In this article, we will discuss how to convert unordered HashMap into Sorted TreeMap We can sort HashMap in both ascending and descending order, by Read More
Java – How to iterate through LinkedHashMap in reverse-order ?
In this article, we will discuss how to iterate through contents of LinkedHashMap in reverse-order 1. Key points about LinkedHashMap: LinkedHashMap maintains insertion-order as it Read More
Java – Adding one HashMap to another HashMap using putAll method
In this article, we will add one HashMap contents to another HashMap using putAll() method of Map interface Adding one HashSet to another HashSet : Method Read More
Java – How to check whether a particular value is present in HashMap ?
In this article, we will discuss how to check whether a value is present in the invoking HashMap or Not ? 1. Searching a value Read More
Java – How to check whether a particular key is present in HashMap ?
In this article, we will discuss how to check whether a key is present in the invoking HashMap or Not 1. Searching a key from Read More
Java – How to delete all entries of HashMap ?
In this article, we will discuss how to remove all entries from invoking HashMap 1. HashMap : clear() –> to delete all entries present in HashMap Note: above Read More
Java – How to delete an entry of HashMap ?
In this article, we will discuss how to remove a particular entry from invoking HashMap 1. HashMap : remove(key) –> to delete a particular entry by specifying Read More
Java 8 – Iterating Map using forEach() method
In one of the previous article, we have discussed various ways to iterate through Map i.e.; Ways to iterate through Map: Using keySet() method and Read More
Java – Iterate through HashMap in 5 ways
In this article, we will discuss various ways to iterate through HashMap or implementation classes of Map interface like LinkedHashMap or TreeMap Map implementation classes Read More
Java – How to get size or length of HashMap ?
In this article, we will discuss how to find size or length of a HashMap or implementation classes of Map interface like LinkedHashMap or TreeMap Read More