Write a java program to display a gui of quadratic equation

package Almigthy;
import javax.swing.*;
/**
*
* @author YUSBETH
*/
public class quadraticEquation {
private static Object String;
private static String txt;
public static void main(String[]args ){
String = null;
int a, b, c;
txt =JOptionPane.showInputDialog("Enter a");
a=Integer.parseInt(txt);
txt =JOptionPane.showInputDialog("Enter b");
b=Integer.parseInt(txt);
txt =JOptionPane.showInputDialog("Enter c");
c=Integer.parseInt(txt);
double D=descriminant(a,b,c);
if (D<0){
System.out.println("Complex Roots");
}
else if(D==0){
double X1=(-b)/(2*a);
double X2=X1;
System.out.println("Equal Roots" + X1);
}
else{
double X1=((-b)+ Math.sqrt(D))/(2*a);
double X2=((-b)- Math.sqrt(D))/(2*a);
System.out.println("Roots" + X1 + "and " + X2);
}
}
public static double descriminant(int a, int b, int c){
double Quad=(b*b)-(4*a*c);
return Quad;
}
}

Do you have a question associated with this? (and please use the code tags)

[code]
YOUR CODE HERE
[/code]

Is how you use code tags.

sorry, i did understand your question, (sunde887) , (dowhile)

What don't you understand? doWhile was asking what is your specific question, as it stands now, this is simply a code dump. Provide an exact question for us to help you with. He also suggested you use code tags when posting code. My post shows how they are used.