CONVERTISEUR EURO <> FRANCS

package calculeuro;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.lang.*;

//public class Calceuro {
	
public class FenetrePrincipale extends JFrame {
	
	static double aux0, aux1, aux2, aux3, aux4, aux5, aux6,
			 aux7, aux8, aux9, exp = 0,inter = 0, apres = 0;
	static boolean virgule = false;
	public FenetrePrincipale maFenêtre;
	
		
	public double expox(double x, double y) {
		double i, x1 = 1;
		for (i=0;i<=x;i++)
		x1 = x1*y;
		return(x1);
	}
	
	public FenetrePrincipale(String s) {
			super(s);
			
			
			addWindowListener(new WindowAdapter() {
				public void windowClosing(WindowEvent e) {
					System.exit(0);
				}});
			JTextField resultat = new JTextField(Double.toString(inter),20);
			resultat.setBounds(0, 30, 135, 30);
    			resultat.setEditable(true);
    			getContentPane().add(resultat);
				aux1 = 0;
			aux2 = 0;
			getContentPane().setLayout(null);
			JButton B1 = new JButton("7");
			B1.setBounds(0, 60, 45, 30);
			getContentPane().add(B1);
			B1.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux7 = 7;
					if (virgule)
					{
						apres = aux7 / expox(exp,10);
						inter = inter + apres;
						exp++;
						
					}
					else
					{
						inter = inter*10+aux7;
					}
					JTextField resultat2 = new JTextField(Double.toString(inter),20);
			resultat2.setBounds(0, 30, 135, 30);
    			resultat2.setEditable(true);
    			getContentPane().add(resultat2);
				}});
			JButton B2 = new JButton("4");
			B2.setBounds(0, 90, 45, 30);
			getContentPane().add(B2);
			B2.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux4 = 4;
					if (virgule)
					{
						apres = aux4 / expox(exp,10);
						inter = inter + apres;
						exp++;
						
					}
					else
					{
					inter = inter*10+aux4;
					}
					JTextField resultat3 = new JTextField(Double.toString(inter),20);
			resultat3.setBounds(0, 30, 135, 30);
    			resultat3.setEditable(true);
    			getContentPane().add(resultat3);
				}});
			JButton B3 = new JButton("1");
			B3.setBounds(0, 120, 45, 30);
			getContentPane().add(B3);
			B3.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux1 = 1;
					if (virgule)
					{
						apres = aux1 / expox(exp,10);
						inter = inter + apres;
						exp++;
						
					}
					else
					{
					inter = inter*10+aux1;
					}
					JTextField resultat4 = new JTextField(Double.toString(inter),20);
			resultat4.setBounds(0, 30, 135, 30);
    			resultat4.setEditable(true);
    			getContentPane().add(resultat4);
				}});
			JButton B4 = new JButton("0");
			B4.setBounds(0, 150, 45, 30);
			getContentPane().add(B4);
			B4.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux0 = 0;
					if (virgule)
					{
						apres = aux0 / expox(exp,10);
						inter = inter + apres;
						exp++;
						
					}
					else
					{
					inter = inter*10+aux0;
					}
					JTextField resultat5 = new JTextField(Double.toString(inter),20);
			resultat5.setBounds(0, 30, 135, 30);
    			resultat5.setEditable(true);
    			getContentPane().add(resultat5);
				}});
			JButton B5 = new JButton("8");
			B5.setBounds(45, 60, 45, 30);
			getContentPane().add(B5);
			B5.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux8 = 8;
					if (virgule)
					{
						apres = aux8 / expox(exp,10);
						inter = inter + apres;
						exp++;
						
					}
					else
					{
					inter = inter*10+aux8;
					}
					JTextField resultat6 = new JTextField(Double.toString(inter),20);
			resultat6.setBounds(0, 30, 135, 30);
    			resultat6.setEditable(true);
    			getContentPane().add(resultat6);
				}});
			JButton B6 = new JButton("5");
			B6.setBounds(45, 90, 45, 30);
			getContentPane().add(B6);
			B6.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux5 = 5;
					if (virgule)
					{
						apres = aux5 / expox(exp,10);
						inter = inter + apres;
						exp++;
						
					}
					else
					{
					inter = inter*10+aux5;
					}
					JTextField resultat7 = new JTextField(Double.toString(inter),20);
			resultat7.setBounds(0, 30, 135, 30);
    			resultat7.setEditable(true);
    			getContentPane().add(resultat7);
				}});
			JButton B7 = new JButton("2");
			B7.setBounds(45, 120, 45, 30);
			getContentPane().add(B7);
			B7.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux2 = 2;
					if (virgule)
					{
						apres = aux2 / expox(exp,10);
						inter = inter + apres;
						exp++;
						
					}
					else
					{
					inter = inter*10+aux2;
					}
					JTextField resultat8 = new JTextField(Double.toString(inter),20);
			resultat8.setBounds(0, 30, 135, 30);
    			resultat8.setEditable(true);
    			getContentPane().add(resultat8);
				}});
			JButton B8 = new JButton(".");
			B8.setBounds(45, 150, 45, 30);
			getContentPane().add(B8);
			B8.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					virgule = true;
				}});
			JButton B9 = new JButton("9");
			B9.setBounds(90, 60, 45, 30);
			getContentPane().add(B9);
			B9.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux9 = 9;
					if (virgule)
					{
						apres = aux9 / expox(exp,10);
						inter = inter + apres;
						exp++;
						
					}
					else
					{
					inter = inter*10+aux9;
					}
					JTextField resultat9 = new JTextField(Double.toString(inter),20);
			resultat9.setBounds(0, 30, 135, 30);
    			resultat9.setEditable(true);
    			getContentPane().add(resultat9);
				}});
			JButton B10 = new JButton("6");
			B10.setBounds(90, 90, 45, 30);
			getContentPane().add(B10);
			B10.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux6 = 6;
					if (virgule)
					{
						apres = aux6 / expox(exp,10);
						inter = inter + apres;
						exp++;
						
					}
					else
					{
					inter = inter*10+aux6;
					}
					JTextField resultat10 = new JTextField(Double.toString(inter),20);
			resultat10.setBounds(0, 30, 135, 30);
    			resultat10.setEditable(true);
    			getContentPane().add(resultat10);
				}});
			JButton B11 = new JButton("3");
			B11.setBounds(90, 120, 45, 30);
			getContentPane().add(B11);
			B11.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux3 = 3;
					if (virgule)
					{
						apres = aux3 / expox(exp,10);
						inter = inter + apres;
						exp++;
						
					}
					else
					{
					inter = inter*10+aux3;
					}
					JTextField resultat11 = new JTextField(Double.toString(inter),20);
			resultat11.setBounds(0, 30, 135, 30);
    			resultat11.setEditable(true);
    			getContentPane().add(resultat11);
				}});
			JButton B12 = new JButton("C");
			B12.setBounds(90, 150, 45, 30);
			getContentPane().add(B12);
			B12.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					aux1 = 0;
					aux2 = 0;
					inter = 0;
					virgule = false;
					exp = 0;
					apres = 0;
					JTextField resultatc = new JTextField(Double.toString(inter),20);
			resultatc.setBounds(0, 30, 135, 30);
    			resultatc.setEditable(true);
    			getContentPane().add(resultatc);
				}});
			JButton Beuro = new JButton("Euro");
			Beuro.setBounds(0, 0, 70, 30);
			getContentPane().add(Beuro);
			Beuro.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					inter = inter / 6.56;
					JTextField resultateuro = new JTextField(Double.toString(inter),20);
			resultateuro.setBounds(0, 30, 135, 30);
    			resultateuro.setEditable(true);
    			getContentPane().add(resultateuro);
				}});
			JButton Bfrancs = new JButton("F");
			Bfrancs.setBounds(70, 0, 66, 30);
			getContentPane().add(Bfrancs);
			Bfrancs.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					inter = inter * 6.56;
					JTextField resultatfrancs = new JTextField(Double.toString(inter),20);
			resultatfrancs.setBounds(0, 30, 135, 30);
    			resultatfrancs.setEditable(true);
    			getContentPane().add(resultatfrancs);
				}});
			Dimension tailleEcran = Toolkit.getDefaultToolkit().getScreenSize();
			int largeurEcran = tailleEcran.width;
			int hauteurEcran = tailleEcran.height;
			int largeur = 145;
			int hauteur = 210;
			int xPos = (largeurEcran - largeur) / 2;
			int yPos = (hauteurEcran - hauteur) / 2;

			setBounds(xPos, yPos, largeur, hauteur);

			setVisible(true);
		}
	}
/////////////////PROGRAMME PRINCIPAL////////
import calculeuro.FenetrePrincipale;
import javax.swing.*;

public class Calculatrice {

public static void main(String[] args) {
	
	/*try {
	    // UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
	    UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
	} catch (Exception exc) {
	    System.err.println("Error loading L&F: " + exc);
	}*/
	FenetrePrincipale maFenetre;
	maFenetre = new FenetrePrincipale ("calculatrice euro");
	}
}