If you have an unordered list of integers, find the maximum and minimum values ??in it.

In Java, a list is an ordered collection of elements that can contain duplicates. It can be created using the List interface, which is implemented by several classes such as ArrayList and LinkedList.

The minimum and maximum values in a list can be found using the min() and max() methods provided by the Collections class in Java. These methods return the minimum and maximum elements in the list, respectively, based on the natural ordering of the elements. For example, if the list contains integers, the natural ordering would be from the smallest to the largest integer.

Here's an example code snippet that demonstrates how to find the minimum and maximum values in a list of integers: 

import java.util.*;

public class MinMaxExample {
    public static void main(String[] args) {
        List list = new ArrayList<>(Arrays.asList(5, 10, 2, 8, 1));
        int min = Collections.min(list);
        int max = Collections.max(list);
        System.out.println("Minimum value: " + min);
        System.out.println("Maximum value: " + max);
    }
}

In this example, the list contains five integers, and the min() and max() methods are used to find the smallest and largest integers, respectively. The output of this program would be: 

Minimum value: 1
Maximum value: 10

Note that if the list is empty, both min() and max() methods will throw a NoSuchElementException.