Program in Java that Display the Largest & Smallest Number

In this Java program, we will take 5 input numbers by the user and display the Largest and Smallest numbers in Graphical User interface (GUI).

This is the same solution of Deitel & Deitel exercises 2.2. However we enhance the output and display in a GUI instead of command line:

• Write an application that reads five integers and determines and prints the largest and the smallest integers in the group.

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Use you're favotie Java Editor and type in paste the code below:

import javax.swing.*;

/**
* Exercise 02 This program will outpt the largest and the smallest number
* Created by Airgildgreat on 3/26/2017.
*/
public class LargerSmallerGUI {

public static void main(String args[]){

//Declaring the variables
String fNumber, seNumber, thNumber, foNumber, fiNumber;
int num1, num2, num3, num4, num5, largest, smallest;

//Reads the input values
fNumber = JOptionPane.showInputDialog("Enter first number: ");
seNumber = JOptionPane.showInputDialog("Enter second number: ");
thNumber = JOptionPane.showInputDialog("Enter third number: ");
foNumber = JOptionPane.showInputDialog("Enter fourth number: ");
fiNumber = JOptionPane.showInputDialog("Enter fifth number: ");

//Converts string nteger values
num1 = Integer.parseInt(fNumber);
num2 = Integer.parseInt(seNumber);
num3 = Integer.parseInt(thNumber);
num4 = Integer.parseInt(foNumber);
num5 = Integer.parseInt(fiNumber);

//If condtions are meet

largest = num1; //Assumes num1 this is the largest;

if (num2 > largest)
largest = num2;

if (num3 > largest)
largest = num3;

if (num4 > largest)
largest = num4;

if (num5 > largest)
largest = num5;

smallest = num1; // Assumes num1 this the smallest

if (num2 < smallest)
smallest = num2;

if (num3 < smallest)
smallest = num3;

if (num4 < smallest)
smallest = num4;

if (num5 < smallest)
smallest = num5;

//Prints the result in Graphical User Interface
JOptionPane.showMessageDialog(null, "Largest is: " + largest + "\nSmallest is: " + smallest
,"Largest and Smallest Program in GUI", JOptionPane.INFORMATION_MESSAGE);
  }
}

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Here is the output. In this case assumes user input the number "5", "6", "7", "8",
"9".

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Below is the version of the Java program which display the output in the Command Line

import java.util.Scanner;

/**
* Exercise no.05 This will determine the largest and the smallest number inut by the user
* Created by Airgildgreat on 3/27/2017.
*/
public class LargerSmallestCMD {

public static void main(String args[]){

//Call Scanner class
Scanner value = new Scanner(System.in);

//Declaring the variables
int num1, num2, num3, num4, num5, largest, smallest;

//Read the inpit value by the user
System.out.printf("Enter First Number: ");
num1 = value.nextInt();

System.out.printf("Enter Second Number: ");
num2 = value.nextInt();

System.out.printf("Enter Third Number: ");
num3 = value.nextInt();

System.out.printf("Enter Fourth Number: ");
num4 = value.nextInt();

System.out.printf("Enter Fifth Number: ");
num5 = value.nextInt();

//If condtions are meet
largest = num1; //Assumes num1 this is the largest;

if (num2 > largest)
largest = num2;

if (num3 > largest)
largest = num3;

if (num4 > largest)
largest = num4;

if (num5 > largest)
largest = num5;

smallest = num1; // Assumes num1 this the smallest

if (num2 < smallest)
smallest = num2;

if (num3 < smallest)
smallest = num3;

if (num4 < smallest)
smallest = num4;

if (num5 < smallest)
smallest = num5;

//Prints the result in Graphical User Interface
System.out.printf("\nThe Largest number is: %d\n The Smallest is: %d", largest, smallest);
   }
}

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Here is the output. In this case assumes user input the number "5", "6", "7", "8",
"9".