I need to write a boolean method called hasEight(), which takes an int as input and returns true if the number contains the digit 8 (e.g., 18, 808). I don't want to use the "String conversion …

What I suggest is to simply check if each character is a digit, what can be efficiently done using Java 8 lambda expressions: boolean isNumeric = someString.chars().allMatch(x -> …

Feb 13, 2012 · You will have to do some math magic to get the nth digit of an arbitrary number, basically using division and modulo 10 if you want it to be a number. Otherwise string ops will …

Jul 23, 2015 · This method below allows you to get a specific number from a int value based on a specific index. public static int getSpecificNum(int number, int index) { int numOfDigits = 0; int …

May 11, 2024 · In short, all we need to do is define the right regex that denotes “contains a number”: static boolean checkUsingMatchesMethod(String input) { return …

In this blog post, we will explore various methods to check if a string contains only digits in Java. Table of Contents. Using Character.isDigit() Method; Using Regular Expressions; Using Java …

Write a function to count the number of digits in a number. For example, if num = 2463, the expected output is 4. Did you find this article helpful? In this program, you'll learn to count the …

May 11, 2024 · In this quick tutorial, we’ll explore different ways of getting the number of digits in an Integer in Java. We’ll also analyze the different methods to figure out which algorithm would …

Mar 17, 2020 · You can use regex (Regular Expression) to match an optional non-digit string followed by a single digit and then followed by optional non-digit string of characters. return …

Nov 28, 2024 · In Java, to check if a string contains only digits, we can use various methods such as simple iteration, regular expressions, streams, etc. Example: The example below uses the …