In post of Find largest and second largest number in the given Array
Condition here is that you should not be using any inbuilt Java classes or methods (i.e. Arrays.sort) or any data structure.
Logic to find largest and second largest number in an array
In this logic we have two variables for first and second number and iterate the array. After that we compare each array element with the first number if first number is less than the array element then assign existing first number to second number and array element to the first number.
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Core Logic here we have If first number is greater than the array element then check if second element is less than the array element, if yes then assign array element to the second number.
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package com.kkjavatutorials.client; /** * @author KK JavaTutorials * Java Program to find largest and second largest number in the given Array */ public class FindTopTwoLargestNumbersTest { public static void main(String[] args) { int inputNumberArray[] = { 10, 5, 350, 100, 45, 95, 560, 101 }; int firstLargestNum = 0; int secondLargestNum = 0; for (int i = 0; i < inputNumberArray.length; i++) { if (firstLargestNum < inputNumberArray[i]) { secondLargestNum = firstLargestNum; firstLargestNum = inputNumberArray[i]; } else if (secondLargestNum < inputNumberArray[i]) { secondLargestNum = inputNumberArray[i]; } } System.out.println("First Latest Number:" + firstLargestNum+ ", Second Latest Number:" + secondLargestNum); } } |
Output Of Program:
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First Latest Number:560, Second Latest Number:350 |
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