Quad Euq

public class Quad1
    public static void main(String[] args)
    {
     
        int a = 2;
        int b = 6;
        int c = 4;
 
        //Finding out the roots
        double temp1 = Math.sqrt(b * b - 4 * a * c);

        double root1 = (-b +  temp1) / (2*a) ;
        double root2 = (-b -  temp1) / (2*a) ;

        System.out.println("The roots of the Quadratic Equation \"2x2 + 6x + 4 = 0\" are "+root1+" and "+root2);

    }
}
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import java.util.Scanner;

public class Calc{
   
    public static void main(String[] args){

        Scanner scanner = new Scanner(System.in);

        System.out.println("Enter the values of a, b and c");

        double a = scanner.nextDouble();
        double b = scanner.nextDouble();
        double c = scanner.nextDouble();
         double r1 = 0;
        double r2 = 0;
         double discriminant = b * b - 4 * a * c;
         if (discriminant > 0){
             // r = -b / 2 * a;
            r1 = (-b + Math.sqrt(discriminant)) / (2 * a);
            r2 = (-b - Math.sqrt(discriminant)) / (2 * a);

            System.out.println("The equation has two real roots " + r1 + " and " + r2);
        }
 
        if (discriminant == 0){
            System.out.println("The equation has one root " +r1);

            r1 = -b / (2 * a);
            r2 = -b / (2 * a);
         }

        if (discriminant < 0){
            System.out.println("The equation has no real root");

        }
     
       
    }

}
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import java.io.*;

class Qua
{
    public static void main(String args[])throws IOException
    {
        InputStreamReader read=new InputStreamReader (System.in);
        BufferedReader in=new BufferedReader (read);
       
        System.out.println("a=");
        int a=Integer.parseInt(in.readLine());
       
        System.out.println("b=");      
        int b=Integer.parseInt(in.readLine());
       
        System.out.println("c=");      
        int c=Integer.parseInt(in.readLine());
       
        double dis = Math.sqrt(b*b-4*a*c);
        double c1=(-b+dis)/(2*a);
        double c2=(+b+dis)/(2*a);
        System.out.println("Either "+c1+"or"+c2);
    }
}
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import javax.swing.JOptionPane;
import java.io.*;
class Solution
{
private int a,b,c,desc;
private  double r1,r2;
    public void solve()
{
desc=b*b-4*a*c;
if(desc>0)
{
r1=(-b+Math.sqrt(desc))/(2*a);
            r2=(-b-Math.sqrt(desc))/(2*a);
JOptionPane.showMessageDialog(null,"roots are"+r1+" "+r2,"Message",JOptionPane.INFORMATION_MESSAGE);
}
else if(desc==0)
{
r1=r2=(-b+Math.sqrt(desc))/(2*a);
JOptionPane.showMessageDialog(null,"roots are"+r1+" "+r2,"Message",JOptionPane.INFORMATION_MESSAGE);
}
else
{
JOptionPane.showMessageDialog(null,"there are no real solutions","Message",JOptionPane.INFORMATION_MESSAGE);
}
}
public void input()
{
String n1,n2,n3;
n1=JOptionPane.showInputDialog("enter a value");
n2=JOptionPane.showInputDialog("enter b value");
n3=JOptionPane.showInputDialog("enter c value");
a=Integer.parseInt(n1);
b=Integer.parseInt(n2);
c=Integer.parseInt(n3);
}
}
class Quadratic
{
public static void main(String[] args)
{
Solution s=new Solution();
s.input();
s.solve();
}
}