Let’s write a Java Program that checks whether a given variable name complies with the naming convention or not using Regular Expressions in Java....

Given a large number in form of string N, the task is to insert a dash between two adjacent odd digits in the given number in form of strings....

Given a number N, the task is to check first whether the given number is binary or not and its value should be greater than 1. print true if N is the binary representation else print false....

Given string str, the task is to check whether the given string is a valid Indian driving license number or not by using Regular Expression.The valid Indian driving license number must satisfy the following conditions:...

Given a string str, the task is to check whether the given string is a valid Visa Card number or not by using Regular Expression. The valid Visa Card number must satisfy the following conditions:...

Given string str, the task is to check whether it is a valid CVV (Card Verification Value) number or not by using Regular Expression. The valid CVV (Card Verification Value) number must satisfy the following conditions:...

Given a string str that contains some HTML tags, the task is to remove all the tags present in the given string str....

Given string str, the task is to check whether the given string is a valid IFSC (Indian Financial System) Code or not by using Regular Expression. The valid IFSC (Indian Financial System) Code must satisfy the following conditions:...

Given string str, the task is to check whether the given string is a valid GST (Goods and Services Tax) number or not using Regular Expression. The valid GST (Goods and Services Tax) number must satisfy the following conditions:...

In this article, we will learn how to move all special char to the end of the String....

Given a string, extract the first letter of each word in it. “Words” are defined as contiguous strings of alphabetic characters i.e. any upper or lower case characters a-z or A-Z. Examples:...

A regular expression pattern in Java is defined using the Pattern class, which is a component of the java.util.regex package. But sometimes, we may wish to reset the internal state of the Pattern object or use it again with a different input string. This helps to improve efficiency in instances where pattern matching occurs often by avoiding the need to recreate the Pattern object numerous times....