CUADRÁTICA EN JAVA

import java.awt.*;

import java.applet.*;

import java.awt.event.*;

import java.lang.Math;

public class Cuadratica extends Applet implements ActionListener {

Label l1, l2, l3, l4, l5;

TextField t1, t2, t3, t4, t5;

Button b1;

public Cuadratica() {

l1 = new Label("a");

t1 = new TextField();

l2 = new Label("b");

t2 = new TextField();

l3 = new Label("c");

t3 = new TextField();

l4 = new Label("Raiz 1");

t4 = new TextField(10);

l5 = new Label("Raiz 2");

t5 = new TextField(10);

b1 = new Button("calcula");

add(l1);

add(t1);

add(l2);

add(t2);

add(l3);

add(t3);

add(l4);

add(t4);

add(l5);

add(t5);

add(b1);

b1. addActionListener(this);

}

public void actionPerformed(ActionEvent ae) {

double A = Double.parseDouble(t1.getText());

double B = Double.parseDouble(t2.getText());

double C = Double.parseDouble(t3.getText());

t4.setText(""+((-B+Math.sqrt((B*B)-(4*A*C)))/(2*A)));

t5.setText(""+((-B-Math.sqrt((B*B)-(4*A*C)))/(2*A)));

}

}

...