Core java

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If you want to practice data structure and algorithm programs, you can go through 100+ java coding interview questions. In this post, we will see how to find smallest and largest element in an array. 1. Introduction to Problem Let’s say we have an array of numbers. int arr[] = new int[]{12,56,76,89,100,343,21,234}; Our goal is to […]

Sometimes, we may need to convert String to bytes Array but how to convert bytes array to String back. toString method does not work correctly here as it just print bytes in String format. You can use String’s constructor to get String back. Example: package org.arpit.java2blog; public class StringContentEqualsExample { public static void main(String[] args) […]

Exceptions I have started writing about the [eafl id=”3687″ name=”Java certification” text=”Java Certification”] and how to prepare for the various topics related to OCAJP exams in my blog. In my previous post, I have published few sample mock questions for StringBuilder class. In this post I am going to explain about the another OCAJP exam […]

If you want to practice data structure and algorithm programs, you can go through 100+ java coding interview questions. In this post , we will see how to implement Queue using Linked List in java. Queue is abstract data type which demonstrates First in first out (FIFO) behaviour. We will implement same behaviour using Array. Although java provides implementation […]

If you want to practice data structure and algorithm programs, you can go through 100+ java coding interview questions. In this post , we will see how to convert sorted LinkedList to balanced binary search tree. There are two ways to do it. Solution 1: It is very much similar to convert sorted array to BST. […]

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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 programs. In this post, we will see how to find length of Linked List in java. You can obviously use size() method of java Linked List class but here we are going to see how to find length […]