Sort numbers in Java to find minimum and maximum values without using Array

Recently a reader contacted me with a question about sorting numbers in Java. After sorting the number the program then needs to print the largest and smallest values. I have written a post earlier that shows one way of finding largest and smallest numbers. That approach used Arrays but the reader wanted to find largest and smallest values from a group of numbers without using Arrays. So here is another approach.

This program accepts input from the user and then prints out the largest and smallest numbers.

import java.util.*; 
public class NumberSorter{
	public static void main(String args[]){
	  double a, b, c, x, y;
	  Scanner console = new Scanner(; 
	  System.out.print("Enter the first number: " ); 
	  a = console.nextDouble() ;
	  System.out.print("Enter the second number: " ); 
	  b  = console.nextDouble() ;
	  System.out.print("Enter the third number: " ); 
	  c = console.nextDouble();
	  x= Math.min(a, Math.min(b, c));
	  y= Math.max(a, Math.max(b, c));
	  System.out.println("\n" +x + " is the smallest number.\n" + y 
	                     +" is the largest number.");


Hope you find this useful. Share your ideas on how else can we find largest and smallest values from a group of numbers Java.

Comments 38

  • Genius! I didn’t know of those methods in java, Math.min() and Math.max(); Very useful thanks for sharing.

  • this is great! i havnt thought about this procedure.

  • I did a course of Java and for this method i’ve learned another algorithm. This method works too.

  • Nice article ! But I don’t think I can cope with it . LOL ! My nose is bleeding when it comes to math .

  • we can even divide the numbers in two – two parts n use if statements to compare the larger n smaller value .. that is a much easier way to understand .. according to me ! 🙂

  • The following can also work:

    Double[] dblArr = {a, b, c, x, y};
    double x=Collections.min(Arrays.asList(dblArr));
    double y = Collections.max(Arrays.asList(dblArr));

  • reali nyc…. fnx guys

  • thanks for the method! i really learned from u! God bless 🙂

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