**Contents**show

## How do you find the maximum number of an ArrayList in Java?

Collections. max(arrayList); Returns the maximum element of the given collection, according to the **natural ordering** of its elements. All elements in the collection must implement the Comparable interface.

## How do you find the maximum value in an ArrayList?

Finding the max value from ArrayList from Collection API is done by running a loop over all the elements or can be found max value with the Collections. **max() method**. Collections. max(): Returns the maximum element of the given collection, according to the natural ordering of its elements.

## How do you find the maximum and minimum value in Java?

**Using Arrays.** **sort method to Find Maximum and Minimum Values in an Array**

- int[] nums={6,-1,-2,-3,0,1,2,3,4};
- Arrays. sort(nums);
- System. out. println(“Minimum = ” + nums[0]);
- System. out. println(“Maximum = ” + nums[nums. length-1]);

## How do you find the minimum element of an ArrayList?

**‘min’ method** of java collection class can be used to find ArrayList. ‘min’ method returns the minimum element of the collection according to the natural ordering of the elements.

## How do you check if an ArrayList is empty?

To check if an ArrayList is empty, you can use **ArrayList.** **isEmpty() method** or first check if the ArrayList is null, and if not null, check its size using ArrayList. size() method. The size of an empty ArrayList is zero.

## How do you find the length of an ArrayList?

The size of an ArrayList can be obtained by **using the java.** **util.** **ArrayList.** **size() method** as it returns the number of elements in the ArrayList i.e. the size.

## How do you sum an ArrayList?

I define a sum method like that in a MathUtils class, and call it like this to sum the contents of a List : // create a **list List<Integer> ints = Arrays**. asList(1, 2, 3); // get the sum of the elements in the list int sum = MathUtils. sum(ints);

## What is Java Util NoSuchElementException?

The NoSuchElementException in Java is **thrown when one tries to access an iterable beyond its maximum limit**. The exception indicates that there are no more elements remaining to iterate over in an enumeration.

## How do you find the second largest number in an ArrayList?

**Find 2nd Largest Number in Array using Collections**

- import java.util.*;
- public class SecondLargestInArrayExample2{
- public static int getSecondLargest(Integer[] a, int total){
- List<Integer> list=Arrays.asList(a);
- Collections.sort(list);
- int element=list.get(total-2);
- return element;
- }

## How do you find the minimum and maximum of numbers?

**HOW TO FIND MAXIMUM AND MINIMUM VALUE OF A FUNCTION**

- Differentiate the given function.
- let f'(x) = 0 and find critical numbers.
- Then find the second derivative f”(x).
- Apply those critical numbers in the second derivative.
- The function f (x) is maximum when f”(x) < 0.
- The function f (x) is minimum when f”(x) > 0.