Java Program To Find First Non-Repeated Character In String (5 ways)

1. Overview

In this article, We will be learning and understanding the various ways to find the first non repeated character in a given string in various ways along with Java 8 Streams. Many programs may face this type of question in programming interviews or face to face round.
Let us start with the simple approach and next discover the partial and single iteration through the string.

Latest 20+ JMS Interview Questions and Answers

1. Introduction

In this tutorial, We'll learn about JMS interview questions that are frequently asked in 2020. As part of the interview, There are chances to ask some of the questions on JMS area if you have 6 years plus. But, even less experience, it is good to have in the profile on JMS experience. The interviewer will check as messaging is a key aspect of enterprise Java development.
JMS is a popular open-source Messaging API and many vendors such as Apache Active MQ, Websphere MQ, Sonic MQ provides an implementation of Java messaging API or JMS.


Usually, Any interview starts with a basic. If all questions are answered properly then we will go onto the JMS experience project-based questions.

Basics mean What is Topic? What is the Queue? What is Publisher? What is Subscriber? What are a Publisher and Subscriber model? How to configure MQ?
Next level means Questions on a project where you have implemented JMS concepts?

Java String startsWith() Examples

1. Overview

In this article, You'll learn how to Test if this string starts with the specified prefix. 

Method startsWith() is case-sensitive.

String API is added with a method startsWith() that returns true if the character sequence represented by the argument is a prefix of the character sequence represented by this string; false otherwise. Note also that true will be returned if the argument is an empty string or is equal to this String object as determined by the equals(Object) method.

This method works exactly opposite to the String endsWith() method.

Java 8 Default and Static Methods - Interface New Concepts

1. Overview

In this Java 8 new concept, We are going to learn today what is the Default Method in Java 8 and why it is introduced in java 8 changes.

Java 8 introduces a new concept of default method implementation in interfaces. This capability is added for backward compatibility so that old interfaces can be used to leverage the lambda expression capability of Java 8. For example, the List interface is not having the forEach() method. If they add this method as an abstract method then all List implementation classes must have to provide the implementation since it is common functionality to iterate the list. So they had to introduce this concept to enhance features and support for the backward classes.