Examples: Input : arr [] = {22, 33, 14, 55, 100, 12} Output : 55 Input : arr [] = {35, 23, 12, 35, 19, 100} Output : 35 This solution does that using the minimal amount of work/overhead and is therefore best. New! In many systems, each if comparison involves a register assignment and then a branch command. Thanks for contributing an answer to Code Review Stack Exchange! How to draw a specific color with gpu shader, The British equivalent of "X objects in a trenchcoat", The Journey of an Electromagnetic Wave Exiting a Router, Manga where the MC is kicked out of party and uses electric magic on his head to forget things, What is the latent heat of melting for a everyday soda lime glass. 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, Java: find the largest number in a list of a number of integers that the user has set. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. I am not particularly strong in C++, bu here are my two cents. Java 8 How to find the Second Largest Number in an Array? To learn more, see our tips on writing great answers. My Code: You can use java 8 streams to sort and skip unnecessary elements. Your email address will not be published. Remove duplicates from ArrayList in Java 8. This method results in three comparisons at most (obviously some assumptions are made about inputs but that was stated in the question), no function calls, and no wasted instructions dereferencing pointers or storing variables. How to help my stubborn colleague learn new ways of coding? Example: Input: arr [] = {12, 35, 1, 10, 34, 1} Output: The second largest element is 34. Actual speed may depend on how the compiler is able to optimize them. How to help my stubborn colleague learn new ways of coding? Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. I'm currently not suppose to use arrays as this is homework. Then, compare 2nd and 3rd elements if the second element is greater than the 3rd swap them. If the first element is greater than the second swap them. 1. Example-1: List = [ 78, 58, 45, 12, 36, 14 ] The second-largest number in the given list is: 58. MathJax reference. Why is {ni} used instead of {wo} in ~{ni}[]{ataru}? Suppose the array contains {11, 67, 88, 53, 2, 72} elements. Continuous Variant of the Chinese Remainder Theorem. How to find second largest number in an array in Java? Find centralized, trusted content and collaborate around the technologies you use most. Let's see another example to get second largest element or number in java array using collections. By I have a question: Is it fast? Add a comment. your mistake is the conditions in the loop To understand this program, you should have the basic knowledge of an integer array and the looping concept. Would fixed-wing aircraft still exist if helicopters had been invented (and flown) before them? How does this compare to other highly-active people in recorded history? Great! Comment *document.getElementById("comment").setAttribute( "id", "a326599c31bce7277ade9415fd8cf0f1" );document.getElementById("e9f84a7fd5").setAttribute( "id", "comment" ); Techndeck.com is a blog revolves around software development & testing technologies. I'm also not convinced that it is slower. He runs a Travel Youtube Channel as well. Before checking the solution, let's think for a moment, how do you approach this problem? So I think there's no problem of overflow. You can also use the C feature that the comparison operators returning 1 on success and 0 on failure. Find the biggest number among two using only one if condition? The minimal solution requires only three comparisons, and can sometimes return after two. In this example, we will find the second-largest number in an array without using any sorting technique. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Although, as some of the other answers demonstrate, the implementation can definitely be. However, if you want the return to always be mathematically the second highest number, then you may wish to include a flag return on failure, like the -1 you already use. Thanks for contributing an answer to Stack Overflow! Below is the implementation of above idea. i really bookmark this page. (with no additional restrictions). How to find the largest number in the array. Let's understand with the help of an example. my question is that I need to find the second largest value from my array but I am getting the same value which is equal to the first value. Either way, why limit yourself, when you could write a function that works in the general case? or Write a program to Find 2nd largest digit in a given number Using C*/ #include<stdio.h> int main () { int num, reminder, Largest= 0,Sec_Largest=0; printf ("Enter the Number :"); scanf ("%d",&num); while (num > 0) { reminder = num % 10; if (Largest < reminder) { Iterate over array. What do I have to do to display the largest and the smallest number using a loop? How to find the second largest number in an array in Java - Educative He created & maintains Techndeck.com, Copyright 2018-2022 Techndeck.com | All Rights Reserved. Connect and share knowledge within a single location that is structured and easy to search. Find Second Largest Number in Array - Scaler Topics How do I keep a party together when they have conflicting goals? In above example, It first sorts the array, then skips the last element (the largest one) using skip(arr.length - 2), and finally finds the first element in the remaining stream, which is the second largest number. 3 Answers Sorted by: 1 At the very least swap these two lines: largest=number;//stores number to largest largest_2=largest;//stores largest to second largest or Share Improve this answer Follow answered May 8, 2015 at 17:51 Ishamael 12.6k 4 33 52 Add a comment 1 You need to change the largest_2 to largest BEFORE you update largest. Repeat this till the end of the array. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. After comparison each array elements we will be finding the largest element. Simplest Examples Click To Tweet. Use MathJax to format equations. OverflowAI: Where Community & AI Come Together, How to find the second largest number in for loops, Behind the scenes with the folks building OverflowAI (Ep. Read in the input, process it, output the results. I'm able to get the smallest and largest but have no clue where to begin to get the second biggest. Java 8 How to find FACTORIAL of an Integer? shawavisek35 Read Discuss Courses Practice Given an array arr [] consisting of N integers, the task is to find the second largest element in the given array using N+log2(N) - 2 comparisons. We can find the second largest number in an array in java by sorting the array and returning the 2nd largest number. Java Stream max() with Examples - HowToDoInJava An alternative is to use an array instead. Find Second Largest Element in an Array Refer to the Example and Explanation sections for more details about how to find second largest number in array and the Approach section to understand the explanation of how to find second largest number in array. @LcioCardoso Technically, it could still overflow if. In above example, Itfirst sorts the array in descending order, then limits the stream to the first 2 elements using limit(2), then skip the first element using skip(1), and finally finds the first element in the remaining stream, which is the second largest number. Some explanation of the answer would be helpful together with the logic/reason why this answers the question. Java Program to find the Smallest Number in an Array, Java Program to Check Whether a Number is Even or Odd. The second largest number in the array is the number that is less than the largest number present in the array and greater than all the other numbers present in the array. Count the occurrence of the given character in a string. Very simple solution. How to swap two strings without using the third variable in java? Eliminative materialism eliminates itself - a familiar idea? Asking for help, clarification, or responding to other answers. Manage Settings To find the second largest element of the given array, first of all, sort the array. How to swap two numbers without using a third variable in Java? Asking for help, clarification, or responding to other answers. To learn more, see our tips on writing great answers. NaNs are usually considered to be not part of the set of number to "find the second greatest of them". And thank you even more for spotting those dangerous mistakes. I need highest, second highest and third highest numbers from my ArrayList. If current element is greater than highest Assign secondHighest = highest Assign highest = currentElement Trying to make it faster will likely make it less readable. This website uses cookies to improve your experience. As a general rule, please stick to the language in the question. How to find second largest number in an array in Java? Java Program to Find the Second Largest and Smallest - Sanfoundry Making statements based on opinion; back them up with references or personal experience. Where you need to use largest_2 to hold the value of largest before changing it's value. Here max() and min() are the functions to find maximum and minimum values among 3 numbers respectively. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, New! Find the 2nd smallest number in a Java array. What is the use of explicitly specifying if a function is recursive or not? At worst, this version does three comparisons and nine register assignments. What is the least number of concerts needed to be scheduled in order that each musician may listen, as part of the audience, to every other musician? then when if i find a value greater than max, it becomes max and the old max becomes scmax. Hi i am really wondering about your java coding regarding second largest number in array . @Ishamael is correct in saying you need to switch these two statements. Find Second Largest Number in Array Java - Know Program You should use if.. else if structure inside your for loop: Run time of this algorithm is O(n). 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, Program that is find the second max integer in Java (adding an option). 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, Find the second highest Score in a cricket match, Java: Finding the highest value in an array, Finding the second highest number in array. @RickSanchez Unfortunately that can overflow an. At best, this version does no assignments and two comparisons. $$. How do I find the the smallest and biggest number in a loop? rev2023.7.27.43548. @EvanBechtol "I'm currently not suppose to use arrays as this is homework". I'm currently not suppose to use arrays as this is homework. finding the second largest value in an array using java I would also like to know how to improve it. Find Second largest element in an array | Set 2 - GeeksforGeeks See also: Java Program to find the Smallest Number in an Array. Your email address will not be published. For eg: The above solution would simply fail for the test values. After sorting an array print the second element from the end of the array. This Java array example allows the user to enter the secLrg_arr size and the items. Could the Lightning's overwing fuel tanks be safely jettisoned in flight? So four branches against three. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, I think you should also take into consideration the value of 'secmax' variable in the above snippet. java - How can I call second largest number from arrayList using To find the second largest element of the given array, first of all, sort the array. In this approach to find the second largest elements in the array, we are first finding the largest element in the array using for loop and Math.max () method. Step 1: Iterate the given array Step 2 (first if condition arr [i] > largest): If current array value is greater than largest value then Move the largest value to secondLargest and make current value as largest Step 3 (second if condition arr [i] > secondLargest ) I probably should have be more specific about what it working for other well ordered types instead of "comparables". Relative pronoun -- Which word is the antecedent? Eliminative materialism eliminates itself - a familiar idea? Maybe it is faster than the other ones. How to check whether a number is a Palindrome number or not in Java? Developed by JavaTpoint. With this you can implement it like: This solution needs no swap and three comparison '<' calls. findFirst() returns an Optional of your object. What is Mathematica's equivalent to Maple's collect with distributed option? Find the second largest number in the array without sorting In this example, we will find the second-largest number in an array without using any sorting technique. Your find_second() function is rather weird. rev2023.7.27.43548. Simplest Examples, How to Filter a List in Java | Unique ways to Filter ArrayList. There is also quite concise solution in case the array is sorted: You can get any n-largest item, but in this case the run time will be O(nlogn), In case you want to use primitive method parameter. highest number) by calling Collections.max() but I also need the second largest and the third largest values. How to count the occurrence of the given character in a string in java? Then I decided that I could save a line by moving both of those lines out and putting one line at the end of the function. What mathematical topics are important for succeeding in an undergrad PDE course? Since you implemented the Comparable interface on PartyNamesDTO you can just do, which will make your list sorted according to compareTo logic and if your sorting is ascending order then you can get max record as, and if it is descending order the other way around. Save my name, email, and website in this browser for the next time I comment. Java Program how to find second largest number in array Let's see another example to get second largest number in java array using collections. Special numbers that might also be valid data are dangerous. It can't be faster than this because there's no way around comparing each value to each of the others. Not the answer you're looking for? at each comparison I adjust. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. For a solution that is easier to verify, I recommend this approach. In this program to find the second largest number in array Java, first, we created a Scanner class object to get input values from the end-user. Required fields are marked *. Return the two largest integers in an array of values. @LcioCardoso i don't see how it could be faster than this. To learn more, see our tips on writing great answers. How am I able to display the largest and the smallest number from the array of the user's input? What if the second-largest number happens to be -1? What is the least number of concerts needed to be scheduled in order that each musician may listen, as part of the audience, to every other musician? So the second time you could be comparing the original a or b to the original c. Once sorted, we can just return b, which is the middle value. Here I have coded in Java Environment and used bubble sort technique. Jonnie mentioned that he cannot use arrays in his solution. Start by stepping through and counting the number of comparisons (, In the edit, I said "assuming the numbers are always positive" (even though I know this solution wasn't reall clever). Schopenhauer and the 'ability to make decisions' as a metric for free will. 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Java program to find second largest number in an array JavaTpoint offers too many high quality services. We can sort any given array in a descending order and pick the second index element.The main concept here is to sort the given array.This can be achieved via Arrays.sort () or Collection.sort () and once the given array is sorted the second largest number can be easily found. This example shows you how to find the second largest number in an array of java. What is the cardinality of intervals in space, and what is the cardinality of intervals in spacetime? Java - Find Second Largest number in an Arrays or List By the way, I think it's also valid to point out that the problem also explains the maximum size of a, b and c is 100. C++ Java Python3 C# Javascript OP said they were positive and less than 100, so not a problem. It also scales well. Are self-signed SSL certificates still allowed in 2023 for an intranet server running IIS? Hopefully swap is clear. Example 1: Input: N = 6 Arr[] = {12, 35, 1, 10, 34, 1} Output: 34 Explanation: The largest element of the array is 35 and the second largest element is 34. Given a positive integer \'n\' ( 1 <= n <= 10 15 ). Java Solution 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Given two Binary trees, find whether the second is a sub tree of the first, Given an array find any three numbers which sum to zero, Given an array, find any three numbers which sum to zero, Given an integer array of size n, find any three numbers, Greatest difference between numbers in list, SE main site tag ratings based on Wilson score confidence interval, Find the greatest common divisor of n numbers, Kotlin Stack using an ArrayList to compare and remove elements. Java Program for Find largest prime factor of a number.
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