(java.lang.StackOverflowError) how do i solve it?

i'm writing a program based on the Quadratic Equation everything looks good to me and there are not syntax or logical errors from what i see and also Eclipse isn't detecting any errors before running. this is the output from the code: Exception in thread "main" java.lang.StackOverflowError at QuadraticEquation.getDiscriminant(QuadraticEquation.java:33) note it continues like this for about 50 lines or so

public class QuadraticEquation {
private double a;
private double b;
private double c;
public QuadraticEquation() {  
double a = 0;
double b = 0;
double c = 0;
}

public QuadraticEquation(double newA, double newB, double newC) {
    a = newA;
    b = newB;
    c = newC;
}

public double discriminant1 = Math.pow(b, 2) - 4 * a * c;
public double discriminant2 = Math.pow(b, 2) - 4 * a * c;

public double getA() {
return getA();
}
public double getB() {
return getB();
}   
public double getC() {
return getC();
}

public double getDiscriminant() {
double discriminant = (b * 2) - (4 * a * c);
    return getDiscriminant();
}

public double getRoot1() {
    double r1 = (-1*b) + Math.sqrt(discriminant1) / (2*a);
    return getRoot1();

}
public double getRoot2() {
    double r2 = (-1*b) - Math.sqrt(discriminant2) / (2*a);
    return getRoot2();
}   

public void setA(double newA1) {
    a = newA1;
}
public void setB(double newB1) {
    b = newB1;
}
public void setC(double newC1) {
    c = newC1;
}

}

import java.util.Scanner; public class TestEquation {

public static void main(String[] args) {
Scanner input = new Scanner(System.in);
QuadraticEquation Quadratic = new QuadraticEquation();



    System.out.println("Please enter the values of the following variables: ");

    System.out.println("a: ");
    Quadratic.setA(input.nextDouble());

    System.out.println("b: ");
    Quadratic.setB(input.nextDouble());

    System.out.println("c: ");
    Quadratic.setC(input.nextDouble());

    if (Quadratic.getDiscriminant() < 0) {

        System.out.println("The equation has the following roots:");

        System.out.println("The first one is " + Quadratic.getRoot1());

        System.out.println("The second one is " + 
Quadratic.getRoot2());


    }
    else if (Quadratic.getDiscriminant() == 0) { 
        System.out.println("The equation has one root:");

        System.out.println(Quadratic.getRoot1());

    }

    else {

    System.out.println("The equation has the no real roots");

    return;

    }
}

}