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Array Archive

In this post, we will see how to find the local minima in the array. Problem An element is local minima if it is less than its neighbors. Solution Naive approach You can use …

In this post, we will see how to add elements to the array. Using Apache’s common lang library You can use varargs add method to add elements to array dynamically. Here are the few add …

In this post, we will see about Sliding Window Maximum in java Problem Given an Array of integers and an Integer k, Find the maximum element of from all the contiguous subarrays of size K. …

In this post, we will learn java array to set conversion. There are many ways to convert array to set. 1. Using Java 8’s Stream If you are using Java 8, I would recommend using …

In this post, we will see how to count number of occurrences (or frequency) of each element in a sorted array Problem Given a Sorted Array of integers containing duplicates. Find the frequency of every …

In this post, we will see how to find subarrays with given sum in an array. Problem Given an Array of non negative Integers and a number. You need to print all the starting and …

In this post, we will see how to find peak element in the array. Problem Given an array of integers. find the peak element in the array. Peak Element is the element of the array …

In this post, we will see how to count number of 1’s in sorted binary array. Problem Print number of 1’s in a given sorted Binary Array. For eg:- int arr = {0,0,0,1,1,1,1}; output : …

In this post, we will see how to find the first repeating element in array of integers. Problem Find the first repeating element in array of integers. For example: Input: array = {10, 7, 8, …

In this post, we will see how to print all subarrays of given array. Problem Print all print all subarrays of given array. For example: If array is {1,2,3} then you need to print {1}, …