Código de Java - Eurator

/** Establece el cambio de una moneda a o

 * permite introducir la moneda origen, moneda destino

 * y cantidad

 * traversion 2.0.- 21-3-2007

 * version 3.0.- 20-8-2020

*/

package Eurator;

import java.awt.*;

import java.io.*;

import java.awt.image.*;

import java.awt.event.*;

import java.text.*;

import javax.swing.*;

import javax.swing.border.*;

import java.util.*;

class Eurator extends JFrame implements ActionListener

{	//ATRIBUTOS

	int oo=0, dd;

	JLabel lo, ld;

	JTextField tfo, tfd;

	JComboBox jcbori, jcbdes;

	JPanel p,p1,p2,p3,p10,p01;

	//private Paint pinta;

	int x,y;

	String datos[] = {"elige moneda","    ", // valores al 17-8-2020

		"euros           ","   1.00",

		"*Alemania marco ","   1.95583",

		"*Austria chelin ","  13.7603 ",

		"*Belgica franco ","  40.3399 ",

		"*Dinamarca corona","   7.04",

	 	"*España peseta  "," 166.386  ",

		"*Finlandia marco","   5.94573",

		"*Francia franco ","   6.55957",

		"*Holanda florin ","   2.20371",

		"*Irlada libra   ","   0.78756",

		"*Italia lira    ","1936.27   ",

		"*Luxenbrg franco","  40.3399 ",

		"*Portugal escud "," 200.482  ",

		"Argentina peso  ","   77.04 ",

		"Australia Dólar ","   1.54",

		"Bahrain Dina    ","   0.5028 ",

		"Brasil Real     ","   1.54 ",

		"Bulgaria Lev    ","   1.73  ",

		"Canada Dólar    ","   1.48  ",

		"Chile peso      "," 838.47 ",

		"China Yuan      ","  7.32 ",

		"Croacia Kuna    ","   6.64 ",

		"Chipre Esterlina","   0.58  ",

		"Eslovaquia Coron","  27.8079",

		"EEUU dolar      ","   1.14",

	 	"Estonia coronas ","  15.6465",

	 	"HongKong dolar  ","  8.34",

		"Hungria florin  "," 307.18",

		"Inglaterra libra","   0.88 ",

		"India rupia   ","  78.30 ",

	 	"Indonesa rupiasi"," 14973,94",

	 	"Islandia coronas","  140.73",

		"Japon  yenes    "," 118.81",

		"Letonia lat     ","   0.7095",

		"Letónia lita    ","   3.4528",

		"Malasia ringgit ","   4.33",

	 	"Noruega coronas ","  9.97 ",

		"Suecia Coronas  ","   9.84 ",

		"Suiza franco    ","   1.03 ",

		"EUSKADI euro    ","   1.0    "

		};

	// array de banderas en el mismo orden del array anterior

	String paises[]={	"Europa.gif",	"Europa.gif   ","Alemania.gif",

		"Austria.gif",	"Belgica.gif",	"Dinamarca.gif","España.gif",

		"Finlandia.gif","Francia.gif",	"Holanda.gif  ","Ireland.gif",

		"Italy.gif",	"Luxenburgo.gif","Portugal.gif","Argentina.gif",

		"Australia.gif","Bahrain.gif",	"Brasil.gif",	"Bulgaria.gif",

		"Canada.gif",	"Chile.gif"	  ,	"China.gif",	"Croacia.gif",

		"Chipre.gif",	"Eslovaquia.gif","EEUU.gif", 	"Estonia.gif",

		"HongKong.gif",	"Hungria.gif",	"Inglaterra.gif","India.gif",

		"Indonesia.gif","Islandia.gif",	"Japon.gif", 	"Letonia.gif",

		"Lituania.gif",	"Malasia.gif",	"Noruega.gif",	"Suecia.gif",

		"Suiza.gif",	"Euzkadi.gif"

		};

	ImageIcon pics[] = new ImageIcon[paises.length];

	ImageIcon cerrar;

	String val[],monedas[];

	String  s[] = {"7","8","9","4","5","6","1","2","3","0",".","C","Off","Borra Todo"};

	JButton b[] = new JButton[s.length];

	JButton banderaOri,banderaDes;

	NumberFormat dc;

	//CONSTRUCTOR

	public Eurator()

	{	int i;

		GridLayout g21,g42,g43,g13,g14,g12;

		addWindowListener(wl);

		Font f  = new Font("Dialog",Font.BOLD|Font.ITALIC,18);

		Font flabel  = new Font("Dialog",Font.BOLD|Font.ITALIC,15);

		Font ff = new Font("Dialog",Font.BOLD|Font.PLAIN,40);

		monedas = new String[datos.length/2];

		val     = new String[datos.length/2];

		for(i=0; i<monedas.length; i++)

		{	monedas[i] = datos[2*i] + " " + datos[2*i+1];	// cargar nombre moneda

			val[i] = datos[2*i+1];							// y su valor en Euros

		}

		//carga banderas

		 for (i=0; i < pics.length; i++)

        	pics[i] = new ImageIcon("banderas\\"+paises[i]);

		cerrar = new ImageIcon("banderas\\"+"cerrar.gif");

		g21 = new GridLayout(2,1,15,15);

		g13 = new GridLayout(1,3,15,15);

		g42 = new GridLayout(4,2,5,5);

		g43 = new GridLayout(4,3,5,5);

		g14 = new GridLayout(1,4,7,7);

		g12 = new GridLayout(1,2,10,0);

		// etiquetas

		lo = new JLabel("ORiGEN",SwingConstants.CENTER);

		ld = new JLabel("DESTiNO",SwingConstants.CENTER);

		ld.setFont(flabel);

		lo.setFont(flabel);

		//Campos de texto

		tfo = new JTextField("0",20);

		tfd = new JTextField("0",20);

		tfo.setEditable(false);

		tfd.setEditable(false);

		tfo.setFont(f);

		tfd.setFont(f);

		// formato

		dc = NumberFormat.getInstance();

	 	if (dc instanceof DecimalFormat) {

     		((DecimalFormat) dc).setDecimalSeparatorAlwaysShown(true);

     		dc.setMaximumFractionDigits(2);

		}

		// ComboBox

		jcbori= new JComboBox(monedas);// admite cualquier array de Objetos

		jcbori.addActionListener(this);

		jcbori.setEditable(false);

		jcbori.setMaximumRowCount((int)Math.rint(monedas.length/2.5));

		jcbdes= new JComboBox(monedas);

		jcbdes.addActionListener(this);

		jcbdes.setEditable(false);

		jcbdes.setMaximumRowCount((int)Math.rint(monedas.length/2.5));

		// Paneles

		p10= new JPanel(g12);

		p01= new JPanel(g12);

		p  = new JPanel(g21);

		p1 = new JPanel(g42);

		p2 = new JPanel(g43);

		p3 = new JPanel(g13);

		p2.setVisible(false);

		getContentPane().add(p);

		//Botones

		for(i=0; i < s.length; i++)

		{	b[i] = new JButton(s[i]);

			b[i].setFont(ff);

			b[i].setBackground(Color.black);

			b[i].setForeground(Color.orange);

			b[i].setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED,Color.red,Color.white,new Color(134, 134, 134),new Color(93, 93, 93)));

			b[i].setToolTipText("BOTON "+String.valueOf(i));

			p2.add(b[i]);

			b[i].addActionListener(this);

		}

		b[12].setToolTipText("BOTON APAGAR");

		p2.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED,Color.red,Color.white,new Color(134, 134, 134),new Color(93, 93, 93)));

		p1.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED,Color.red,Color.white,new Color(134, 134, 134),new Color(93, 93, 93)));

		banderaOri= new JButton(pics[0]);

		banderaDes= new JButton(pics[0]);

		b[12].setText(null);

		b[12].setBackground (Color.red);

		b[11].setBackground (Color.green);

		b[11].setForeground (Color.black);		b[13].setBackground (Color.red);

		b[12].setFont(f);

		b[12].setIcon(cerrar);

		b[13].setFont(f);

		// Campos de texto

		tfo.setBackground(Color.getHSBColor(10,20,21));

		tfd.setBackground(Color.getHSBColor(10,20,21));

		p1.setBackground(Color.green);

		p2.setBackground(Color.gray);

		jcbori.setBackground(Color.getHSBColor(30,30,30));

		jcbdes.setBackground(Color.getHSBColor(30,30,30));

		p3.add(b[12]);

		p10.add(banderaOri);

		p10.add(lo);

		p01.add(banderaDes);

		p01.add(ld);

		p1.add(p10);

		p1.add(p01);

		p1.add(jcbori);

		p1.add(jcbdes);

		p1.add(tfo);

		p1.add(tfd);

		p1.add(b[13]);p1.add(p3);

		p.add(p1);

		p.add(p2);

	}

//METODOS

	// Gestion Eventos

	public void actionPerformed(ActionEvent e)

	{	String so,sd;

		//	Boton OFF

		if(e.getSource()==b[12])

			System.exit(-1);

		// Lista Origen deplegable

		if(e.getSource()== jcbori)

		{	so=((JComboBox)(e.getSource())).getSelectedItem().toString();

			oo=((JComboBox)(e.getSource())).getSelectedIndex();

			banderaOri.setIcon(pics[oo]);

			lo.setText(paises[oo].substring(0,paises[oo].length()-4));//- .gif

			lo.setToolTipText(paises[oo].substring(0,paises[oo].length()-4));

			if(oo!=0 && dd!=0)

			{	iniciar();//activarTeclado();

				return;

			}

			else

			{	p2.setVisible(false);

				desactivarTeclado();

				return;

			}

		}

		// Lista Destino deplegable

		if(e.getSource()== jcbdes)

		{	sd=((JComboBox)(e.getSource())).getSelectedItem().toString();

			dd=((JComboBox)(e.getSource())).getSelectedIndex();

			banderaDes.setIcon(pics[dd]);

			ld.setText(paises[dd].substring(0,paises[dd].length()-4));

			ld.setToolTipText(paises[dd].substring(0,paises[dd].length()-4));

			if(oo!=0 && dd!=0)

			{	iniciar();

				return;

			}

			else

			{	p2.setVisible(false);

				return;

			}

		}

		if(e.getSource() instanceof JButton)

		{

			String ss;

			ss=((JButton)e.getSource()).getText();

			if(ss.charAt(0)>='0' && ss.charAt(0)<='9' || ss.charAt(0)=='.')

			{

				tfo.setText(tfo.getText()+ss.charAt(0));

				tfo.setToolTipText(String.valueOf(dc.format(Double.parseDouble(tfo.getText())))+

				"       "+monedas[jcbori.getSelectedIndex()]+" /  1€");

				if(b[10]==e.getSource())	b[10].setEnabled(false);

				actualizar();

				return;

			}

			if(ss.charAt(0)=='C')

			{	if(tfo.getText().length()>0)

				{	if(tfo.getText().charAt(tfo.getText().length()-1)=='.')

						b[10].setEnabled(true);

					tfo.setText(tfo.getText().substring(0,tfo.getText().length()-1));

					b[11].setEnabled(true);

					actualizar();

				}

				if(tfo.getText().length()==0)

					b[11].setEnabled(false);

				return;

			}

			//Borrar Todo

			if(ss.compareTo(b[13].getText())==0)

			{	reiniciar();	return;	}

		}

	}

	private void actualizar()

	{

		double valor=0;

		try{valor = Double.parseDouble(tfo.getText()) / Double.parseDouble(val[oo])

					* Double.parseDouble(val[dd]);

			valor=ponDecimales(valor,3);

		}	catch(NumberFormatException nfe){			valor=0;		}

		tfd.setText(String.valueOf(dc.format(valor)));		//salida formateada

		tfd.setToolTipText(String.valueOf(dc.format(valor))+"       "+monedas[jcbdes.getSelectedIndex()]+" /  1€");

		if(tfo.getText().length()>0) //  activar tecla C

			b[11].setEnabled(true);

	}

	private void iniciar()

	{	activarTeclado();

		tfo.setText("");

		tfd.setText("");

		b[10].setEnabled(true);

		b[11].setEnabled(false);

	}

	private void reiniciar()

	{	iniciar();

		jcbori.setSelectedIndex(0);

		jcbdes.setSelectedIndex(0);

		lo.setText("Origen");

		ld.setText("Destino");

	}

	private void activarTeclado()	{	p2.setVisible(true);	}

	private void desactivarTeclado(){	p2.setVisible(false);	}

	public static double ponDecimales(double resultado,int precis)

	{	return Math.rint(resultado*Math.pow(10,precis)) / Math.pow(10,precis);

	}

	// clase interna

	WindowListener wl = new WindowAdapter() // creamos un objeto  de oyentes cierre de ventana

	{	public void WindowClosing(WindowEvent e){

                dispose();System.exit(0);

	}

        };

	public static void main(String args[])

	{

                Eurator c = new Eurator();

		c.setTitle("Cambio's Eurator 3.0");

		c.setSize(350,400);

		c.setVisible(true);

		c.setResizable(false);

	}

}