How to get the Numericals of a String in Java
You are given an input string.
For each symbol in the string if it’s the first character occurrence, replace it with a ‘1’, else replace …
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342 articles about java development, tools, and best practices
How to “Dashatize It” in Java
The challenge
Given a variable n,
If n is an integer, Return a string with dash'-'marks before and after each odd integer, but do not begin or end the …
Comparing Array Multiplicities in Java
The challenge
Given two arrays a and b write a function comp(a, b) (orcompSame(a, b)) that checks whether the two arrays have the “same” …
How to Find the Max Tree Node Value in Java
The challenge
You are given a binary tree. Implement the method findMax which returns the maximal node value in the tree.
For example, the maximum in …
Read Article →How to String Search with a Wildcard in Java
The challenge
The method below is the most simple string search algorithm. It will find the first occurrence of a word in a text string.
haystack = …
Get the Consonant Value in Java
The challenge
Given a lowercase string that has alphabetic characters only and no spaces, return the highest value of consonant substrings. Consonants …
Read Article →Word Values Challenge in Java
The challenge
Given a string "abc" and assuming that each letter in the string has a value equal to its position in the alphabet, our string …
Split and then add both sides of an array together in Java
The challenge
You will receive an array as a parameter that contains 1 or more integers and a number n.
Here is a little visualization of the process: …
Read Article →Sort Words by Position Index in Java
The challenge
Your task is to sort a given string. Each word in the string will contain a single number. This number is the position the word should …
Read Article →How to get the Current Machine Name and Logged In User in Java
It’s very easy to get the current machine name and logged in user using Java.
Get the Currently Logged in User
String username = …How to install GraalVM on Mac
Install GraalVM with Homebrew
Homebrew is the preferred way to install anything on your Mac.
brew install graalvm/tap/graalvm-ce-java17
Install …
Read Article →How to Generate Random Integers with a Range in Java
Java comes with many different ways to generate random integers, even if you need to specify a lower and upper bound to constrain your required value …
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