Java Lab_00

package Lab;

import java.util.*;

public class Lab {

    Scanner in;
    float a,b,c;
    float x1,x2,dx,delta;
    float xa,xb;

    public Lab() {
        in = new Scanner(System.in);

        System.out.print("Podaj a: ");
        a = in.nextFloat();
        System.out.print("Podaj b: ");
        b = in.nextFloat();
        System.out.print("Podaj c: ");
        c = in.nextFloat();

        System.out.print("Podaj x1: ");
        x1 = in.nextFloat();
        System.out.print("Podaj x2: ");
        x2 = in.nextFloat();

        System.out.print("Podaj dx: ");
        dx = in.nextFloat();

        delta = (float) (Math.pow(a, 2) - 4*a*c);

        System.out.format("Postać równania %.1fx^2 + %.1fx + %.1f\n",a,b,c);
        System.out.format("Wypisanie wartosci od %.2f do %.2f z skokiem %.2f\n",x1,x2,dx);

        if(delta>=0){
            xa = (float)(b+Math.sqrt(delta))/2*a;
            System.out.format("xa = %.2f\n",xa);
            if(delta>0){
                xb = (float)(b-Math.sqrt(delta))/2*a;
                System.out.format("xa = %.2f\n",xb);
            }
        }

        System.out.format("====================\n");
        System.out.format("| %6s | %6s |\n","X","Y");
        for(float i=x1;i<x2;i++){
            System.out.format("| %6.2f | %6.2f |\n",i,(a*(i*i)+(b*i)+c));
        }
        System.out.format("====================\n");

    }

    public static void main(String[] args) {
        new Lab();
    }

}