How to Calculate BMI in Java
The challenge
BMI stands for Body Mass Index and is a value derived from the mass and height of a person. The BMI is defined as the body mass divided …
Java
342 articles about java development, tools, and best practices
How to Solve the Robot Bounded In Circle Challenge in Java
The challenge
On an infinite plane, a robot initially stands at (0, 0) and faces north. The robot can receive one of three instructions: …
How to Convert a String to a Number in Java
The challenge
We need a function that can transform a string into a number. What ways of achieving this do you know?
Note: Don’t worry, all …
Read Article →How to Convert an Integer to Binary using Java
The challenge
Given a non-negative integer n, write a function toBinary/ToBinary which returns that number in a binary format.
to_binary(1) /* should …How to create a Logical Operator in Java
Exclusive “or” (xor) Logical Operator
In some scripting languages like PHP, there exists a logical operator (e.g. &&, ||, and, or, …
How to merge sorted integer arrays (without duplicates) in Java
The challenge
Write a function that merges two sorted arrays into a single one. The arrays only contain integers. Also, the final outcome must be …
Read Article →Find the Force of Gravity Between Two Objects with Java
The challenge
Your job is to find the gravitational force between two spherical objects (obj1 , obj2).
Two arrays are give :
arr_val(value array), …
Playing the Bulls and Cows Game in Java
The challenge
You are playing the following Bulls and Cows game with your friend: You write down a number and ask your friend to guess what the number …
Read Article →Calculate the Sum of Root To Leaf Binary Numbers in Java
The challenge
Given a binary tree, each node has value `` or 1. Each root-to-leaf path represents a binary number starting with the most significant …
How to “Rock Paper Scissors” in Java
The challenge
Let’s play Rock Paper Scissors! You have to return which player won! In case of a draw return Draw!.
Examples: …
Read Article →Get the mean of an array in Java
The challenge
It’s the academic year’s end, fateful moment of your school report. The averages must be calculated. All the students come …
Read Article →How to Convert Hex to Decimal in Java
The challenge
Write a function that converts an input string contains a hex value, and return a decimal.
Test cases
import org.junit.Test;
import …