Validation

Validate Email Address with Regular Expression using Kotlin

This tutorial will show you how to validate email address with regular expression using Kotlin. In web applications or standalone applications where we need to send emails to intended recipients, it is recommended to check the valid email address before sending email to those particular emails for safety purpose. Here we will use regular expression […]

HackerRank Solution: Valid Username Regular Expression using Kotlin

This tutorial will show you how to solve HackerRank Valid Username Checker using Kotlin. In different web applications we define certain rules for choosing the username, such as, it should consists of maximum 30 characters; it should not have any special character; it may contain one or more digits; it must starts with a letter, […]

SunCertPathBuilderException: unable to find valid certification path to requested target

Before reading this tutorial please go through the tutorial using SSL with jax-ws webservice Download the InstallCert.java from  http://blogs.sun.com/andreas/resource/InstallCert.java Install the InstallCert.java 1. Compile the class using “javac InstallCert.java” in command prompt 2. Execute the command “java InstallCert localhost:8443” in command prompt After installation, now you will get following output in command prompt

Verify a string contains only numeric value in Java

Introduction The below example shows how to verify that a string contains only numeric value in Java. String may contain float value, double value etc. This example uses regular expression to check a string contains only numeric values. It makes sure that your string should contain only digits and dot(.).

Scroll to top