3-4 Java: Distance Between Two Points using Math Class

Java Programming Challenge 3.4 - Distance Between Two Points using Math Class and java string format

Write an application that reads the (x,y) coordinates for two points. Compute the distance between the two points using a formula

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[catbatis]

This really helped me with my homework, thank you so much!!

[ufotofu]

Nice. I'm learning java and have been looking for interesting projects. When I got to the formula I stopped the video and did it myself. Instead of calling the Math method I multipled both terms together instead of squaring them.
I see you used Double for the variables but wrote "nextInt" for the Scanner parts. How did that work?

[frdi]

Great stuff only problem is my OCD is going mental over that auto stub comment, still being there.

[danielcarrilloiii]

Here is how I put it together to make it more visually appealing.


import java.text.DecimalFormat;

public class DistanceFormula {

public static void main(String[] args)
{
//Variables needed to run program
DecimalFormat decForm = new DecimalFormat( "0.###" );
String strInput;
int x1 = 0;
int x2;
int y1;
int y2;
int repeat;
double distance;

//D0-While loop to allow for the program to restart on user command
do{

// User Input
strInput = JOptionPane.showInputDialog(null, "Enter X1 coordinate ");
x1 = Integer.parseInt(strInput);
strInput = JOptionPane.showInputDialog(null, "Enter Y1 coordinate ");
y1 = Integer.parseInt(strInput);
strInput = JOptionPane.showInputDialog(null, "Enter X2 coordinate ");
x2 = Integer.parseInt(strInput);
strInput = JOptionPane.showInputDialog(null, "Enter Y2 coordinate ");
y2 = Integer.parseInt(strInput);

//Calculation
distance = (Math.pow(x2-x1, 2) +(Math.pow(y2-y1, 2)));
distance = Math.sqrt(distance);

//Output
JOptionPane.showMessageDialog(null, "The distance is " + decForm.format( distance ));

// Does the user want to calculate another set of coordiates?
repeat = JOptionPane.showConfirmDialog(null, "Would you like to calculate another " +
"set of coordinates?", "Please Confirm.",
JOptionPane.YES_NO_OPTION);
}while (repeat == JOptionPane.YES_OPTION);

}

}

[julianlloyd]

Why does it sound like you’re playing a xylophone at the same time? 🤔

[randy]

import java.util.Scanner;

public class Distance {

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double x1 = 0;
double x2;
double y1;
double y2;
double distance;


System.out.print("Enter X1 coordinate ");
x1 = scanner.nextDouble();
System.out.print("Enter Y1 coordinate ");
y1 = scanner.nextDouble();
System.out.print("Enter X2 coordinate ");
x2 = scanner.nextDouble();
System.out.print("Enter Y2 coordinate ");
y2 = scanner.nextDouble();
distance = (Math.pow(x2-x1, 2) +(Math.pow(y2-y1, 2)));
distance = Math.sqrt(distance);
System.out.print("The distance is " + distance);

}

}


I just did the process in 2 steps. I first add the coordinates and power then to 2. Then I square root the entire thing. I try to do all in one step but it just won't work. so anyone give me some feedback on how I can improve my code :)