Java 5 – ArrayList v/s Generic ArrayList
In this article, we will discuss the difference between non-generics & generics versions of ArrayList i.e.; ArrayList v/s ArrayList<T> 1. ArrayList v/s ArrayList<T>: ArrayList ArrayList<T> Read More
Category: Java
Java 5 – Generics interview question and answers
In this article, we will cover some of the interview questions with their justification on Generics concepts introduced in Java 1.5 version These are most Read More
Java 5 – Wildcard arguments in Generics
In this article, we will discuss wildcard arguments in Generics introduced in Java 1.5 version 1. Wildcard arguments: Question mark (?) is known as wildcard Read More
Java 5 – Generics methods
In this article, we will discuss how to create Generics methods and why it is needed and also rules while defining Generics methods Already in Read More
Java 5 – Bounded Types in Generics
In the previous article, we have discussed on Generics class which helps to instantiate with only particular type-parameter and this way Generics classes provides type-safety Read More
Java 5 – Generics classes
In this article, we will discuss how to create Generics classes and what are the rules while defining/using Generics classes 1. Generics Classes: From Java Read More
Java 5 – Introduction to Generics
In this article, we will discuss new feature introduced in Java 1.5 version called Generics Before starting with introduction part, we will go through few Read More
Java 8 – How to remove an entry from HashMap by comparing keys ?
In the previous article, we have discussed on how to remove an entry or entries from HashMap by comparing values using Java 8 APIs Here, Read More
Java 8 – How to remove an entry from HashMap by comparing values ?
In this article, we will discuss how to remove an entry or entries from HashMap using Java 8 APIs Before proceeding further, it is recommended Read More
Java – How ConcurrentModificationException can be handled ?
In this article, we will discuss various possibilities when ConcurrentModificationException is thrown and its resolution with respect to HashMap Often, this term is quite confusing. So, we Read More
Java – 3 types of for-loop
In this article, we will discuss different types of for-loop evolved over years in various Java versions Starting Java 1.1 version, for-loop was always there Read More
Java – How to left pad with zeroes to a String ?
In this article, we will discuss how to left pad with zeroes to a String. Actually, there are number of options and library available for Read More
Java – Overriding toString() method to print values of ArrayList
In this article, we will discuss and understand why we need to override toString() method for displaying ArrayList contents Problem statement for ArrayList : Assume Read More
Java – JDBC program to connect IBM DB2 database running on Mainframe z/OS system
In this article, we will learn and list down the steps to connect IBM DB2 database running on Mainframe z/OS system in Java and finally Read More
Java – To print first N natural numbers
In this article, we will discuss how to print n natural numbers in Java Printing first N natural numbers : Using for loop Using while Read More
Java features version-wise
In this article, we will discuss features introduced in different versions of Java or J2SE or Java SE or JDK Below terms / abbreviation are Read More
Java – Swapping two numbers without temporary variable
In this article, we will discuss one of the famous interview question on how to swap two numbers without using third/temporary variable Actually, there are Read More
Java – Converting StringTokenizer tokens into ArrayList
In this article, we will discuss how to convert StringTokenizer tokens into ArrayList Few things to note: StringTokenizer is deprecated now, but however it is Read More
Java – Merging two String[] Array and Sorting
In this article, we will discuss how to merge two arrays and then sort according to natural order i.e.; ascending order. Well, by passing Comparator Read More
Java – Sorting Arrays in Ascending and Descending order
In this article, we will discuss how to sort Arrays in both ascending and descending order 1. Sorting Arrays in Ascending order : Passing original/actual Read More