How do you find the second highest number in an Arraylist?

Find the second-highest number in an ArrayList in Java

By Ishika Koytekar

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Find the second-highest number in an ArrayList in Java
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Java Program to find Second Largest Number in an Array
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In this tutorial, we are going to learn how to find the second-highest number in an ArrayList in Java.

ArrayList is present in java.util package and it provides a dynamic approach for the Arrays. We can perform various operations such as modifying, storing, removing, manipulating Arrays whenever and wherever we want.

Our task is to find the second-highest number in an ArrayList, by simply sorting the numbers in an ArrayList we can achieve our goal. Sort the numbers in ascending order and return the second number from the end.

We can find the second-highest number in an ArrayList by following simple steps as follows:

Import java.util package for ArrayList.
Create an object of ArrayList.

ArrayList<Integer> arrayList = new ArrayList<Integer>();

Add values in ArrayList.
Sort the numbers in ArrayList using Collections.sort(ArrayList) method.

Collections.sort(arrayList);

Return the second-highest number from the sorted ArrayList.

arrayList.get(arrayList.size()-2);

Finally, print the number.

Following is the Java code for our task:

//import package for ArrayList import java.util.*; public class ArrayList { public static void main(String args[]){ int temp = 0; //create object of ArrayList ArrayList<Integer> arrayList = new ArrayList<Integer>(); //add numbers in an ArrayList arrayList.add(3); arrayList.add(1); arrayList.add(6); arrayList.add(4); arrayList.add(9); arrayList.add(8); //sort numbers in an ArrayList Collections.sort(arrayList); //return second highest number from sorted ArrayList temp=arrayList.get(arrayList.size()-2); System.out.println("Second highest number"); System.out.println(temp); } }

Output:

Second highest number 8

This is how we can find the second-highest number in an ArrayList in Java. I hope you find this tutorial useful.

Also, read:How to count number of sentences in a text file in Java

Java Program to find Second Largest Number in an Array

We can find the second largest number in an array in java by sorting the array and returning the 2nd largest number. Let's see the full example to find the second largest number in java array.

Test it Now

Output:

Second Largest: 5 Second Largest: 77

Find Second largest element in an array

Given an array of integers, our task is to write a program that efficiently finds the second largest element present in the array.
Example:

Input: arr[] = {12, 35, 1, 10, 34, 1} Output: The second largest element is 34. Explanation: The largest element of the array is 35 and the second largest element is 34 Input: arr[] = {10, 5, 10} Output: The second largest element is 5. Explanation: The largest element of the array is 10 and the second largest element is 5 Input: arr[] = {10, 10, 10} Output: The second largest does not exist. Explanation: Largest element of the array is 10 there is no second largest element

“java program to find second largest number in an array” Code Answer

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