High, Low number checker in Java

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High, Low number checker in Java

This sample java program will determine the highest and the lowest number entered by the user. The program will ask the user to enter 3 numbers and the program will display which is the highest and lowest among them. It is also coded in gui and console version.

Source code:

import javax.swing.*;
class HighLowNumberCheckerGUI {
public static void main(String[] args) {
String input1, input2, input3;	
double num1=0, num2=0, num3=0, high=0, low=5;
String cont="n";

do
{
input1 = JOptionPane.showInputDialog(null,"enter first number: ");
num1=Double.parseDouble(input1);

input2 = JOptionPane.showInputDialog(null,"enter second number: ");
num2=Double.parseDouble(input2);

input3 = JOptionPane.showInputDialog(null,"enter third number: ");
num3=Double.parseDouble(input3);

if (num1 <= num2 && num1 <= num3){
	low=num1;
	}
else if (num2 <= num1 && num2 <= num3){
	low=num2;
	}
else if	(num3 <= num1 && num3 <= num2){ low=num3; } if (num1 >= num2 && num1 >= num3){
	high=num1;
	}
else if (num2 >= num1 && num2 >= num3){
	high=num2;
	}
else if	(num3 >= num1 && num3 >= num2){
	high=num3;
	}
	
JOptionPane.showMessageDialog(null,"Highest number: " + high  + "
" + "Lowest number: "+ low );
			

	cont = JOptionPane.showInputDialog(null,"Continue? y or n ");
	}while (cont.matches("y"));
	JOptionPane.showMessageDialog(null,"Program Closing");

}
}