Hacer cálculos estadísticos: moda, mediana, varianza, media, desviación típica, cuartil

import javax.swing.*;

import javax.swing.border.*;

import java.awt.*;

import java.awt.event.*;

public class Probabilidad_Estadistica extends JFrame implements ActionListener{

                JPanel paneldatos, paneldatosarriba, paneldatosabajo, paneldatoscentro,paneldatoscentroi, paneldatoscentroc, paneldatoscentrod, panelcalculos;

                JLabel lbldato, lblmedia, lblmoda, lblmediana, lblcuartil1, lblcuartil3, lbldtipica, lblvarianza;

                JTextField txtdato, txtmedia, txtmoda, txtmediana, txtcuartil1, txtcuartil3, txtdtipica, txtvarianza;

                JButton btnagregar, btnup, btndown, btnquitar, btnlimpiar, btnordenar, btncalcular;

                JList lista;

                JScrollPane desliza;

                DefaultListModel modelo;

                Dimension d;

                              

                public Probabilidad_Estadistica(){

                               //Inicializando el JFRAME con los valores deseados

                               super("Probabilidad & Estadistica");

                               this.setLayout(new GridLayout(1,2,15,15));

                               this.setVisible(true);

                               this.setSize(1000,300);

                               this.setLocationRelativeTo(null);

                               this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                              

                               //Creando los paneles principales

                               paneldatos=new JPanel(new BorderLayout());

                               paneldatos.setBorder(new TitledBorder("Datos"));

                               panelcalculos=new JPanel(new GridLayout(7,2,10,10));

                               panelcalculos.setBorder(new TitledBorder("Calculos"));

                              

                               //Creando los paneles secundarios

                               paneldatosarriba=new JPanel(new FlowLayout());

                               paneldatosabajo=new JPanel(new FlowLayout());

                               paneldatoscentro=new JPanel(new FlowLayout());

                               paneldatoscentroi=new JPanel(new GridLayout(2,1,5,5));

                               paneldatoscentroc=new JPanel();

                               paneldatoscentrod=new JPanel(new GridLayout(2,1,5,5));

                              

                               //Agregando objetos a paneldatosarriba

                               lbldato=new JLabel("Dato");

                               txtdato=new JTextField(10);

                               btnagregar=new JButton("Agregar");

                               paneldatosarriba.add(lbldato);

                               paneldatosarriba.add(txtdato);

                               paneldatosarriba.add(btnagregar);

                              

                               //Agregando objetos a paneldatoscentro

                               btnup=new JButton("Arriba");

                               btndown=new JButton("Abajo");

                               paneldatoscentroi.add(btnup);

                               paneldatoscentroi.add(btndown);

                              

                               lista=new JList();

                               modelo=new DefaultListModel();

                               lista.setModel(modelo);

                               d=new Dimension(150,300);

                               lista.setPreferredSize(d);

                               desliza=new JScrollPane(lista);

                               paneldatoscentroc.add(desliza);

                              

                               btnquitar=new JButton("Quitar");

                               btnlimpiar=new JButton("Limpiar");

                               paneldatoscentrod.add(btnquitar);

                               paneldatoscentrod.add(btnlimpiar);

                              

                               //Agregando objetos a paneldatosabajo

                               btnordenar=new JButton("Ordenar");

                               btncalcular=new JButton("Calcular");

                               paneldatosabajo.add(btnordenar);

                               paneldatosabajo.add(btncalcular);

                              

                               //Agregando objetos a panelcalculos

                               lblmedia=new JLabel("Media");

                               lblmoda=new JLabel("Moda");

                               lblmediana=new JLabel("Mediana");

                                lblcuartil1=new JLabel("Cuartil 1");

                               lblcuartil3=new JLabel("Cuartil 3");

                               lbldtipica=new JLabel("Desviacion Tipica");

                               lblvarianza=new JLabel("Varianza");

                               txtmedia=new JTextField(15);

                               txtmoda=new JTextField(15);

                               txtmediana=new JTextField(15);

                                txtcuartil1=new JTextField(15);

                               txtcuartil3=new JTextField(15);

                               txtdtipica=new JTextField(15);

                               txtvarianza=new JTextField(15);

                               panelcalculos.add(lblmedia);

                               panelcalculos.add(txtmedia);

                               panelcalculos.add(lblmoda);

                               panelcalculos.add(txtmoda);

                               panelcalculos.add(lblmediana);

                               panelcalculos.add(txtmediana);

                               panelcalculos.add(lblcuartil1);

                               panelcalculos.add(txtcuartil1);

                               panelcalculos.add(lblcuartil3);

                               panelcalculos.add(txtcuartil3);

                               panelcalculos.add(lbldtipica);

                               panelcalculos.add(txtdtipica);

                               panelcalculos.add(lblvarianza);

                               panelcalculos.add(txtvarianza);

                                                                                             

                               //Agregando los paneles

                               paneldatoscentro.add(paneldatoscentroi, FlowLayout.LEFT);

                               paneldatoscentro.add(paneldatoscentroc, FlowLayout.CENTER);

                               paneldatoscentro.add(paneldatoscentrod, FlowLayout.RIGHT);

                               paneldatos.add(paneldatosarriba, BorderLayout.NORTH);

                               paneldatos.add(paneldatoscentro, BorderLayout.CENTER);

                               paneldatos.add(paneldatosabajo, BorderLayout.SOUTH);

                               this.add(paneldatos);

                               this.add(panelcalculos);

                              

                               //Agregando eventos

                               btnagregar.addActionListener(this);

                               btnquitar.addActionListener(this);

                               btnlimpiar.addActionListener(this);

                               btnup.addActionListener(this);

                               btndown.addActionListener(this);

                               btnordenar.addActionListener(this);

                               btncalcular.addActionListener(this);                     

                              

                }

                public void actionPerformed(ActionEvent e){

                               if(e.getActionCommand().equals(btnagregar.getText())){

                                               Agregarobjeto();

                               }

                               if(e.getActionCommand().equals(btnquitar.getText())){

                                               Quitar();

                               }

                               if(e.getActionCommand().equals(btnlimpiar.getText())){

                                               Limpiar();

                               }

                               if(e.getActionCommand().equals(btnup.getText())){

                                               Up();

                               }

                               if(e.getActionCommand().equals(btndown.getText())){

                                               Down();

                               }

                               if(e.getActionCommand().equals(btnordenar.getText())){

                                               Ordenar();

                               }

                               if(e.getActionCommand().equals(btncalcular.getText())){

                                               //Agregando la instancia de la clase Calcular, la cual realiza las operaciones

                                               Calcular totales=new Calcular();

                                               totales.Media();

                                               totales.Moda();

                                               totales.Mediana();

                                               totales.Cuartil1();

                                               totales.Cuartil3();

                                               totales.DesviacionTipica();

                                               totales.Varianza();

                               }

                }

               

                //METODOS PARA LOS BOTONES

                //Metodo Agregar: Agrega el dato del txtdato al JList

                public void Agregarobjeto(){

                               modelo.addElement(txtdato.getText());

                               txtdato.setText("");                     

                }

               

                //Metodo Quitar: Elimina el elemento seleccionado del JList

                public void Quitar(){

                               int seleccion;

                               seleccion=lista.getSelectedIndex();

                               modelo.removeElementAt(seleccion);

                }

                //Metodo Limpiar: Elimina todos los elementos del Jlist

                public void Limpiar(){

                               modelo.removeAllElements();

                               txtmedia.setText("");

                               txtmoda.setText("");

                               txtmediana.setText("");

                               txtcuartil1.setText("");

                               txtcuartil3.setText("");

                               txtdtipica.setText("");

                               txtvarianza.setText("");

                }

               

                //Metodo Up: Mueve el objeto seleccionado hacia arriba

                public void Up(){

                               int subir,bajar;

                               Object up, down;

                               subir=lista.getSelectedIndex()-1;

                               bajar=lista.getSelectedIndex();

                               if(subir<0){

                                               JOptionPane.showMessageDialog(this,"No se puede mover hacia arriba porque es el primer elemento","Atencion!!!",JOptionPane.INFORMATION_MESSAGE);

                               }else{

                               up=modelo.getElementAt(bajar);

                               down=modelo.getElementAt(subir);

                               modelo.setElementAt(up,subir);

                               modelo.setElementAt(down,bajar);

                               lista.setSelectedIndex(subir);

                               }

                }

               

                //Metodo Down: Mueve el objeto seleccionado hacia abajo

                public void Down(){

                               int subir, bajar;

                               Object up,down;

                               bajar=lista.getSelectedIndex()+1;

                               subir=lista.getSelectedIndex();

                               if(bajar==modelo.getSize()){

                                               JOptionPane.showMessageDialog(this,"No se puede mover hacia abajo porque es el ultimo elemento","Atencion!!!",JOptionPane.INFORMATION_MESSAGE);

                               }else{

                               down=modelo.getElementAt(subir);

                               up=modelo.getElementAt(bajar);

                               modelo.setElementAt(down,bajar);

                               modelo.setElementAt(up,subir);

                               lista.setSelectedIndex(bajar);

                               }

                }

               

                //Metodo Ordenar: Ordena de menor a mayor los datos del JList

                public void Ordenar(){

                        for(int i=0;i<modelo.getSize()-1;i++){

                                               for(int a=i+1;a<modelo.getSize();a++){

                                                               String objeto1=String.valueOf(modelo.getElementAt(i));

                                                       String objeto2=String.valueOf(modelo.getElementAt(a));

                                                       double p1=Double.parseDouble(objeto1);

                                                               double p2=Double.parseDouble(objeto2);

                                                                              if(p1>p2){

                                                                                              Object temporal;

                                                                                              temporal=modelo.getElementAt(a);

                                                                                              modelo.setElementAt(modelo.getElementAt(i),a);

                                                                                              modelo.setElementAt(temporal,i);       

                                                               }                             

                                               }

                               }

                }

               

                //Clase Calcular: Calcula los datos necesarios con los datos que estan en la JList

                class Calcular{

                               //Calcular la Media Aritmetica

                               public void Media(){

                                               double total=0;

                                               double resultado;

                                               Object vector[]=modelo.toArray();

                                               String cadena[]=new String[modelo.getSize()];

                                               double numeros[]=new double[modelo.getSize()];

                                               //Primer for para convertir de tipo Object a String

                                               for(int i=0;i<modelo.getSize();i++){

                                                               cadena[i]=String.valueOf(vector[i]);

                                               }

                                               //Segundo for para convertir de tipo String a double

                                               for(int b=0;b<cadena.length;b++){

                                                               numeros[b]=Double.parseDouble(cadena[b]);

                                               }

                                               //Tercer for para sumar los valores del vector;

                                               for(int c=0;c<numeros.length;c++){

                                                               total+=numeros[c];

                                               }

                                               resultado=total/numeros.length;

                                               txtmedia.setText(String.valueOf(resultado));                 

                               }

                               //Calcula la Moda, el valor que mas se repite

                               public void Moda(){

                                               int total=0;

                                               double nummoda;

                                               Object vector[]=modelo.toArray();

                                               String cadena[]=new String[modelo.getSize()];

                                               double numeros[]=new double[modelo.getSize()];

                                               //Primer for para convertir de tipo Object a String

                                               for(int i=0;i<modelo.getSize();i++){

                                                               cadena[i]=String.valueOf(vector[i]);

                                               }

                                               //Segundo for para convertir de tipo String a double

                                               for(int b=0;b<cadena.length;b++){

                                                               numeros[b]=Double.parseDouble(cadena[b]);

                                               }

                                               //Recorre el vector y si halla un valor igual al primero va aumentando en 1 el contador de veces

                                               for(int c=0;c<numeros.length;c++){

                                                               double numero=numeros[c];

                                                               int totalveces=0;

                                                               for(int d=0;d<numeros.length;d++){

                                                                              if(numero==numeros[d]){

                                                                                              totalveces++;

                                                                               }

                                                               }                                                            

                                                               if(totalveces>total){

                                                                                              total=totalveces;

                                                                                              txtmoda.setText("El numero "+String.valueOf(numero)+" Se Repite "+String.valueOf(total)+" Veces");

                                                               }

                                               }

                               }

                              

                               //Calcula la Mediana, el valor del centro de la lista de datos

                               public void Mediana(){

                                               Object vector[]=modelo.toArray();

                                               String cadena[]=new String[modelo.getSize()];

                                               double numeros[]=new double[modelo.getSize()];

                                               int posicion=0;

                                               int division=0;

                                               double mediana=0;

                                               //Primer for para convertir de tipo Object a String

                                               for(int i=0;i<modelo.getSize();i++){

                                                               cadena[i]=String.valueOf(vector[i]);

                                               }

                                               //Segundo for para convertir de tipo String a double

                                               for(int b=0;b<cadena.length;b++){

                                                               numeros[b]=Double.parseDouble(cadena[b]);

                                               }

                                              

                                               posicion=numeros.length%2;

                                               if(posicion==0){

                                                               division=numeros.length/2;

                                                               mediana=(numeros[division]+numeros[division+1])/2;

                                                               txtmediana.setText(""+String.valueOf(mediana));

                                               }

                                               if(posicion==1){

                                                               division=(numeros.length+1)/2;

                                                               txtmediana.setText(""+String.valueOf(numeros[division-1]));

                                               }

                               }

                              

                               //Metodo Cuartil 1

                               public void Cuartil1(){

                                               double cuartil=0.25*modelo.getSize();

                                               double residuo=cuartil%1;

                                               double total=0;

                                               if(residuo>0){

                                                               double entero=(cuartil/1)-(cuartil%1);

                                                               total=(entero+1)*2;

                                                               txtcuartil3.setText(String.valueOf(total));

                                               }

                                               if(residuo==0){

                                                               double entero=(cuartil/1)-(cuartil%1);                                

                                                               total=(entero+1)/2;

                                                               txtcuartil3.setText(String.valueOf(total));

                                               }

                               }

                              

                               //Metodo Cuartil 3

                               public void Cuartil3(){

                                               double cuartil=0.75*modelo.getSize();

                                               double residuo=cuartil%1;

                                               double total=0;

                                               if(residuo>0){

                                                               double entero=(cuartil/1)-(cuartil%1);

                                                               total=(entero+1)*2;

                                                               txtcuartil1.setText(String.valueOf(total));

                                               }

                                               if(residuo==0){

                                                               double entero=(cuartil/1)-(cuartil%1);                                

                                                               total=(entero+1)/2;

                                                               txtcuartil1.setText(String.valueOf(total));

                                               }

                               }

                              

                               //Metodo Desviacion Tipica

                               public void DesviacionTipica(){

                                               Object vector[]=modelo.toArray();

                                               String cadena[]=new String[modelo.getSize()];

                                               double numeros[]=new double[modelo.getSize()];

                                               double radical=0;

                                               double desviacion=0;

                                               double desviaciontotal=0;

                                               double total=0;

                                               //Primer for para convertir de tipo Object a String

                                               for(int i=0;i<modelo.getSize();i++){

                                                               cadena[i]=String.valueOf(vector[i]);

                                               }

                                               //Segundo for para convertir de tipo String a double

                                               for(int b=0;b<cadena.length;b++){

                                                               numeros[b]=Double.parseDouble(cadena[b]);

                                               }

                                              

                                               for(int c=0;c<numeros.length;c++){

                                                               radical=(Math.pow((numeros[0]-numeros.length),2))/numeros.length;

                                                               desviacion=Math.sqrt(radical);

                                                               desviaciontotal+=desviacion;

                                               }

                                               total=desviaciontotal/numeros.length;

                                               txtdtipica.setText(String.valueOf(total));

                               }

                              

                               //Metodo Varianza

                               public void Varianza(){

                                               Object vector[]=modelo.toArray();

                                               String cadena[]=new String[modelo.getSize()];

                                               double numeros[]=new double[modelo.getSize()];

                                               double radical=0;

                                               double desviacion=0;

                                               double desviaciontotal=0;

                                               double total=0;

                                               double var=0;

                                               //Primer for para convertir de tipo Object a String

                                               for(int i=0;i<modelo.getSize();i++){

                                                               cadena[i]=String.valueOf(vector[i]);

                                               }

                                               //Segundo for para convertir de tipo String a double

                                               for(int b=0;b<cadena.length;b++){

                                                               numeros[b]=Double.parseDouble(cadena[b]);

                                               }

                                              

                                               for(int c=0;c<numeros.length;c++){

                                                               radical=(Math.pow((numeros[0]-numeros.length),2))/numeros.length;

                                                               desviacion=Math.sqrt(radical);

                                                               desviaciontotal+=desviacion;

                                               }

                                               total=desviaciontotal/numeros.length;

                                               var=Math.sqrt(total);

                                               txtvarianza.setText(String.valueOf(var));

                                              

                               }

                              

                }//Fin de la clase Calcular

               

               

                                               public static void main(String []args){

                                                               new Probabilidad_Estadistica();

                                               }

}