java programs

In this post,we will see how to check if number is even odd. It is one of the basic programs of Java programming language. import java.util.Scanner; public class EvenOddFinder { public static void main(String args[]) { int num; Scanner scanner = new Scanner(System.in); System.out.print("Enter a Number : "); num = scanner.nextInt(); if(num%2 == 0) { […]

In this post, we will see how to add two numbers in java. This is the most basic program of java programming language. import java.util.Scanner; public class Calculator { public static void main(String args[]) { int num1, num2, sum; // Taking input from user Scanner scanner = new Scanner(System.in); System.out.print("Enter two numbers : "); num1 […]

In this post, we will see how to reverse a number in java. Here is simple program to reverse a number. package org.arpit.java2blog; import java.util.Scanner; public class ReverseNumberMain { public static void main(String[] args) { int number, reversedNumber=0, remainder; Scanner scan = new Scanner(System.in); System.out.print("Enter a Number : "); number = scan.nextInt(); while(number != 0) […]

In this post, we will see how to print Floyd’s triangle in java. Problem You need to print Floyd’s triangle as below for n=5. Floyd’s triangle **************** 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Floyd’s triangle in java Let’s create class "FloydTriangleMainExample.java" as below package org.arpit.java2blog; /* […]

In this post, we will see how to find number of words in a String. Problem Find the number of words in a String. For example: There are 6 words in below String welcome to java tutorial on Java2blog Algorithm The algorithm will be very simple. Initialize count with 1 as if there are no […]

In this tutorial, we will see Java interview programs for logic building. These java programs will help students to crack Java interview. Here is the list of Top 10 Java interview programs for logic building. Question 1: Check if number is odd or even? Answer: It is a very basic question. You need to check […]

In this tutorial, we will see how to check if number is power of two. There are many approaches to check if number is power of two or not. Approach 1: It is very easy and straight forward approach. Run a while loop which checks for condition if n is even number (n%2==0). If n is […]

If you want to practice data structure and algorithm programs, you can go through data structure and algorithm interview questions. 1. Overview In this post, we will see how to find the second largest number in an array. This is a one of common interview questions on array data structure. 2. Introduction to Problem Statement Given […]

If you want to practice data structure and algorithm programs, you can go through data structure and algorithm interview questions. 1. Overview In this article, we will see how to find missing number in Array of 1 to n. This is one of basic coding interview question asked in my interviews. 2. Introduction to Problem Statement […]