JavaSwing_CurrencyConverter

import javax.swing.*;
import java.awt.Color;
import java.awt.event.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.Scanner;
import java.awt.Font;
import java.awt.*;  
import javax.swing.JFrame;  

public class CC implements ActionListener  {  
	JTextField tf1,tf2,tf3;  
    JButton b1, b2;  
    JComboBox cur1, cur2;
    JLabel Lin, Lcur1, Lcur2, LCon, name, eurpng1, dolpng1, gbppng1, eurpng2, dolpng2, gbppng2;
    JMenu menu, submenu;  
    JMenuItem info, rates, mue, mug, med, meg, mgd, mge;

    
    public CC(){  
    	try {
    	File fileIn = new File ("data.txt");
		File fileOut = new File ("res.txt");
		FileInputStream fr = new FileInputStream(fileIn);
		FileWriter fw = new FileWriter(fileOut);
	    Scanner data = new Scanner(fr);
	    String x=" ";
	    double b = 0, rate1= 0, rate2= 0, rate3= 0, rate4= 0, rate5= 0, rate6= 0;
	    
	    
	    while (data.hasNext())  {
	      
	    	x = data.next();
	    	b = data.nextDouble();
	    	
	    	if (x.equals("eur to usd:")) 
	    		 rate1 = b;
	    	if (x.equals("usd to eur:")) 
	    		rate2 = b;
	    	if (x.equals("eur to gbp:")) 
	    		rate3 = b;
	    	if (x.equals("usd to gbp:")) 
	    		rate4 = b;
	    	if (x.equals("gbp to eur:")) 
	    		rate5 = b;
	    	if (x.equals("gbp to usd:")) 
	    		rate6 = b;
	    	
	    	}
	  
	    
    	}
    	 catch(Exception e) {
    		 System.out.print(e);
    	}
    	
		
	   
        JFrame f= new JFrame("Currency Converter");  
        
        JMenuBar mb=new JMenuBar();  
        menu=new JMenu("Menu");  
        
        submenu=new JMenu("Rates");  
        info=new JMenuItem("Info");  
        rates=new JMenuItem("Rates");  
        mue=new JMenuItem("USD to EUR"); 
        mug=new JMenuItem("USD to GBP"); 
        med=new JMenuItem("EUR to USD"); 
        meg=new JMenuItem("EUR to GBP"); 
        mgd=new JMenuItem("GBP to USD"); 
        mge=new JMenuItem("GBP to EUR"); 
        
        
        menu.add(info); 
        menu.add(submenu);
        submenu.add(mue);submenu.add(mug);submenu.add(med);submenu.add(meg);submenu.add(mgd);submenu.add(mge);
        mb.add(menu);  
        f.setJMenuBar(mb);  
        
        tf1=new JTextField();  
        tf1.setBounds(50,60,150,20);
        
        String currencies1[]= {"EUR", "USD", "GBP"};
        String currencies2[]= {"USD", "GBP", "EUR"};
         
        cur1 = new JComboBox(currencies1);
        cur1.setBounds(250,60,150,20); 
        cur2 = new JComboBox(currencies2);
        cur2.setBounds(450,60,150,20); 
        
        Lin = new JLabel("Enter the amount:");
        Lin.setBounds(50,40,150,20);
        Lcur1 = new JLabel("Select input currency:");
        Lcur1.setBounds(250,40,150,20);
        Lcur2 = new JLabel("Select output currency:");
        Lcur2.setBounds(450,40,150,20);
        
        eurpng1 = new JLabel(" ");
        Image eur1 = new ImageIcon(this.getClass().getResource("/euras.png")).getImage();
        eurpng1.setIcon(new ImageIcon(eur1));
        eurpng1.setBounds(80,120,150,100);
        
        dolpng1 = new JLabel(" ");
        Image dol1 = new ImageIcon(this.getClass().getResource("/dollar.png")).getImage();
        dolpng1.setIcon(new ImageIcon(dol1));
        dolpng1.setBounds(80,120,150,100);
        
        gbppng1 = new JLabel(" ");
        Image gdp1 = new ImageIcon(this.getClass().getResource("/brit.png")).getImage();
        gbppng1.setIcon(new ImageIcon(gdp1));
        gbppng1.setBounds(80,120,150,100);
        
        eurpng2 = new JLabel(" ");
        Image eur2 = new ImageIcon(this.getClass().getResource("/euras.png")).getImage();
        eurpng2.setIcon(new ImageIcon(eur2));
        eurpng2.setBounds(475,120,150,100);
        
        dolpng2 = new JLabel(" ");
        Image dol2 = new ImageIcon(this.getClass().getResource("/dollar.png")).getImage();
        dolpng2.setIcon(new ImageIcon(dol2));
        dolpng2.setBounds(475,120,150,100);
        
        gbppng2 = new JLabel(" ");
        Image gdp2 = new ImageIcon(this.getClass().getResource("/brit.png")).getImage();
        gbppng2.setIcon(new ImageIcon(gdp2));
        gbppng2.setBounds(475,120,150,100);
        
        eurpng1.setVisible(true);dolpng1.setVisible(false);gbppng1.setVisible(false);eurpng2.setVisible(false);dolpng2.setVisible(true);gbppng2.setVisible(false);
    
        LCon = new JLabel("Result:");
        LCon.setBounds(275,180,200,20);
        
        Font font1 = new Font("SansSerif", Font.BOLD, 17);
        
        name = new JLabel("Currency Converter");
        name.setBounds(245,10,200,20);
        name.setFont(font1);
        
        tf3=new JTextField();  
        tf3.setBounds(275,200,100,20);  
        tf3.setEditable(false);   
  
        b1=new JButton("CONVERT");  
        b1.setBounds(275,125,100, 40);   
        b1.addActionListener(this); 
         
        f.getContentPane().setBackground(new Color(255, 204, 51));
        f.add(tf1);f.add(tf3);f.add(b1);f.add(cur1);f.add(cur2);f.add(Lin);f.add(Lcur1);f.add(Lcur2);f.add(LCon);f.add(name);f.add(eurpng1);f.add(dolpng1);f.add(gbppng1);f.add(eurpng2);f.add(dolpng2);f.add(gbppng2);
        f.setSize(700, 300);  
        f.setResizable(false);
        f.setLocationRelativeTo(null);
        f.setLayout(null);  
        f.setVisible(true);
   }
 
    public void actionPerformed(ActionEvent e) { 
    	
    
    	
    	try {
    		
        String s1=tf1.getText();  
        double a=Double.parseDouble(s1);  
        double result=0;
        
        DecimalFormat dc = new DecimalFormat("0.00");
        	
    	if (cur1.getSelectedItem().equals("EUR") && cur2.getSelectedItem().equals("EUR")) {
        tf3.setText("€" + dc.format(a));
        eurpng1.setVisible(true);eurpng2.setVisible(true);dolpng1.setVisible(false);dolpng2.setVisible(false);gbppng1.setVisible(false);gbppng2.setVisible(false);
        }
        if (cur1.getSelectedItem().equals("USD") && cur2.getSelectedItem().equals("USD")) {
        tf3.setText("$" + dc.format(a));
        dolpng1.setVisible(true);dolpng2.setVisible(true);gbppng1.setVisible(false);gbppng2.setVisible(false);eurpng1.setVisible(false);eurpng2.setVisible(false);
        }
        if (cur1.getSelectedItem().equals("GBP") && cur2.getSelectedItem().equals("GBP")) {
        tf3.setText("£" + dc.format(a));
        gbppng1.setVisible(true);gbppng2.setVisible(true);dolpng1.setVisible(false);dolpng2.setVisible(false);eurpng1.setVisible(false);eurpng2.setVisible(false);
        }
        
        if (cur1.getSelectedItem().equals("EUR") && cur2.getSelectedItem().equals("USD")) {
        	result = a * 1.13;
        tf3.setText("$" + dc.format(result));
        eurpng1.setVisible(true);eurpng2.setVisible(false);dolpng1.setVisible(false);dolpng2.setVisible(true);gbppng1.setVisible(false);gbppng2.setVisible(false);
        }
        if (cur1.getSelectedItem().equals("USD") && cur2.getSelectedItem().equals("EUR")) {
        	result = a * 0.88;
        tf3.setText("€" + dc.format(result));
        eurpng1.setVisible(false);eurpng2.setVisible(true);dolpng1.setVisible(true);dolpng2.setVisible(false);gbppng1.setVisible(false);gbppng2.setVisible(false);
        }
        if (cur1.getSelectedItem().equals("EUR") && cur2.getSelectedItem().equals("GBP")) {
        	result = a * 0.86;
        tf3.setText("£" + dc.format(result));
        eurpng1.setVisible(true);eurpng2.setVisible(false);dolpng1.setVisible(false);dolpng2.setVisible(false);gbppng1.setVisible(false);gbppng2.setVisible(true);
        }
        if (cur1.getSelectedItem().equals("USD") && cur2.getSelectedItem().equals("GBP")) {
        	result = a * 0.76;
        tf3.setText("£" + dc.format(result));
        eurpng1.setVisible(false);eurpng2.setVisible(false);dolpng1.setVisible(true);dolpng2.setVisible(false);gbppng1.setVisible(false);gbppng2.setVisible(true);
        }
        if (cur1.getSelectedItem().equals("GBP") && cur2.getSelectedItem().equals("EUR")) {
        	result = a * 1.17;
        tf3.setText("€" + dc.format(result));
        eurpng1.setVisible(false);eurpng2.setVisible(true);dolpng1.setVisible(false);dolpng2.setVisible(false);gbppng1.setVisible(true);gbppng2.setVisible(false);
        }
        if (cur1.getSelectedItem().equals("GBP") && cur2.getSelectedItem().equals("USD")) {
        	result = a * 1.32;
        tf3.setText("$" + dc.format(result));
        eurpng1.setVisible(false);eurpng2.setVisible(false);dolpng1.setVisible(false);dolpng2.setVisible(true);gbppng1.setVisible(true);gbppng2.setVisible(false);
        }
    	}
    	catch (NumberFormatException ex) {
    		tf3.setText("Enter numbers!");
    	}
    }  

    public static void main(String[] args) {  
    new CC();  
}
}