Java Program to Compare Elements in a Collection

In this article, we will understand how to compare elements in a collection. The Collection is a framework that provides architecture to store and manipulate the group of objects. Java Collections can achieve all the operations that you perform on a data such as searching, sorting, insertion, manipulation, and deletion.

Below is a demonstration of the same −

Suppose our input is −

Input list: [300, 500, 180, 450, 610]

The desired output would be −

Min value of our list : 180
Max value of our list : 610

Algorithm

Step 1 - START
Step 2 - Declare a list namely input_list
Step 3 - Define the values.
Step 4 - Using the function = Collections.min() and Collections.max(), we fetch the min and max values of the collection.
Step 5 - Display the result
Step 6 - Stop

Example 1

Here, we bind all the operations together under the ‘main’ function.

import java.util.*;
public class Demo {
   public static void main(String[] args){
      List<Integer> input_list = new ArrayList<>();
      input_list.add(300);
      input_list.add(500);
      input_list.add(180);
      input_list.add(450);
      input_list.add(610);
      System.out.println("The list is defined as: " +input_list);
      int minimum_value = Collections.min(input_list);
      int maximum_value = Collections.max(input_list);
      if (minimum_value == maximum_value) {
         System.out.println("All the elements of the list are equal");
      }
      else {
         System.out.println("\nMin value of our list : " + minimum_value);
         System.out.println("Max value of our list : " + maximum_value);
      }
   }
}

Output

The list is defined as: [300, 500, 180, 450, 610]

Min value of our list : 180
Max value of our list : 610

Example 2

Here, we encapsulate the operations into functions exhibiting object oriented programming.

import java.util.*;
public class Demo {
   static void min_max(List<Integer> input_list){
      int minimum_value = Collections.min(input_list);
      int maximum_value = Collections.max(input_list);
      if (minimum_value == maximum_value) {
         System.out.println("All the elements of the list are equal");
      }
      else {
         System.out.println("\nMin value of our list : " + minimum_value);
         System.out.println("Max value of our list : " + maximum_value);
      }
   }
   public static void main(String[] args){
      List<Integer> input_list = new ArrayList<>();
      input_list.add(300);
      input_list.add(500);
      input_list.add(180);
      input_list.add(450);
      input_list.add(610);
      System.out.println("The list is defined as: " +input_list);
      min_max(input_list);
   }
}

Output

The list is defined as: [300, 500, 180, 450, 610]

Min value of our list : 180
Max value of our list : 610