pls... help.... alignment....

[eiramae]

how to center the button "Calculate" and align the Label and TextField......... pls... help....
here's my code

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import javax.swing.JPanel;
import javax.swing.BorderFactory;

public class CurrencyConverter extends Applet implements ActionListener

{	

	Label header;

	Label amountlabel;
	 TextField amountfield;

	Label fromlabel;
	 Choice fromchoice;
	 	double[] value={1.00000,43.5241,101.830,4.85908,10.1931,2980.70,29.8823,1.45021,1.45006,5.48783,0.43355,17.9677,5.52844,11.3770,4.40437,4.85908,1.44881,252.415,201.184,117.540,0.58340,1,434.32,0.52105,2.55983,29.8823,45.3683,0.31801,11.7450,5.85440,2.91617,148.510,31,434.3,29.2834,76.4078,22.3162,177.516,123.253,6.49595,0.97210,1.59249,7.85630,0.62392,76.4078};

	Button calculate;

	Label exchangeratelabel;
	 TextField exchangeratefield;

	Label calcamtlabel;
	 TextField calcamtfield;


	public void init()
	{
	setLayout(new FlowLayout(FlowLayout.CENTER));
	setBackground(Color.green);

	header = new Label("Currency Conversion Calculator");
	header.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD | java.awt.Font.ITALIC, 12));
	add(header);


	amountlabel = new Label("Amount of Dollars to be Exchange");
	amountlabel.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD | java.awt.Font.ITALIC, 12));
	add(amountlabel);

	amountfield = new TextField(15);
	amountfield.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD | java.awt.Font.ITALIC, 12));
	add(amountfield);
		
	fromlabel = new Label("Convert From:");
	fromlabel.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD | java.awt.Font.ITALIC, 12));
	add(fromlabel);

	fromchoice = new Choice();
	fromlabel.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD | java.awt.Font.ITALIC, 12));
	add(fromchoice);
		fromchoice.addItem("United States  US Dollar          (USD)");
		fromchoice.addItem("Philippines    Philippine Peso    (PHP)");
		fromchoice.addItem("Albania        Albanian Lek       (ALL)");
		fromchoice.addItem("Andorra        Andorran Franc     (ADF)");
		fromchoice.addItem("Austria        Austrian Schilling (ATS)");
		fromchoice.addItem("Belarus        Belarusian Ruble   (BYR)");
		fromchoice.addItem("Belgium        Belgian Franc      (BEF)");
		fromchoice.addItem("Bosnia         Bosnia Mark        (BAM)");
		fromchoice.addItem("Bulagria       Bulgarian Lev      (BGN)");
		fromchoice.addItem("Cyprus         Cypriot Pound      (CYP)");
		fromchoice.addItem("Czech Republic Czech Koruna       (CZK)");
		fromchoice.addItem("Denmark        Danish Krone       (DKK)");
		fromchoice.addItem("Estonia        Estonian Kroon     (EEK)");
		fromchoice.addItem("Findland       Finnish Markka     (FIM)");
		fromchoice.addItem("Germany        German Mark        (DEM)");
		fromchoice.addItem("Greece         Greek Drachma      (GRD)");
		fromchoice.addItem("Hungary        Hungarian Forint   (HUF)");
		fromchoice.addItem("Iceland        Iceland Krona      (ISK)");
		fromchoice.addItem("Ireland        Irish Punt         (IEP)");
		fromchoice.addItem("Italy          Italian Lira       (ITL)");
		fromchoice.addItem("Latvia         Latvian Lats       (LVL)");
		fromchoice.addItem("Lithuania      Lithuanian Litas   (LTL)");
		fromchoice.addItem("Luxemburg      Luxembourg Franc   (LUF)");
		fromchoice.addItem("Macedonia      Macedonian Denar   (MKD)");
		fromchoice.addItem("Malta          Maltese Lira       (MTL)");
		fromchoice.addItem("Moldova        Moldovan Leu       (MDL)");
		fromchoice.addItem("Norway         Norwegian Kroner   (NOK)");
		fromchoice.addItem("Poland         Polish Zloty       (PLN)");
		fromchoice.addItem("Portugal       Portuguese Escudo  (PTE)");
		fromchoice.addItem("Romania        Romanian Lei       (ROL)");
		fromchoice.addItem("Russia         Russian Rouble     (RUB)");
		fromchoice.addItem("Serbia         Serbian Dinar      (RSD)");
		fromchoice.addItem("Slovakia       Slovak Koruna      (SKK)");
		fromchoice.addItem("Slovenia       Slovenian Tolar    (SIT)");
		fromchoice.addItem("Spain          Spanish Peseta     (ESP)");
		fromchoice.addItem("Sweden         Swedish Krona      (SEK)");
		fromchoice.addItem("Switzerland    Swiss Franc        (CHF)");
		fromchoice.addItem("Turkey         Turkish Lira       (TRY)");
		fromchoice.addItem("Ukraine        Ukraine Hryvnia    (UAH)");
		fromchoice.addItem("United Kingdom British Pound      (GBP)");
		fromchoice.addItem("Yugoslavia     Yugoslav Dinar     (YUN)");

	calculate = new Button("Calculate");
	calculate.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD | java.awt.Font.ITALIC, 12));
	add(calculate);
	calculate.addActionListener(this);

	exchangeratelabel = new Label("Exchange Rate");
	exchangeratelabel.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD | java.awt.Font.ITALIC, 12));
	add(exchangeratelabel);

	exchangeratefield = new TextField(15);
	exchangeratefield.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD | java.awt.Font.ITALIC, 12));
	add(exchangeratefield);

	calcamtlabel = new Label("Calculated Amount");
	calcamtlabel.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD | java.awt.Font.ITALIC, 12));	
	add(calcamtlabel);

	calcamtfield = new TextField(15);
	calcamtfield.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD | java.awt.Font.ITALIC, 12));
	add(calcamtfield);
		
	

	}

	

	public void actionPerformed(ActionEvent e)
	{
		double cal,total;
	
		int actval = fromchoice.getSelectedIndex();
		total = value[actval];

		int af = Integer.parseInt(amountfield.getText());

		cal=af*total;

		exchangeratefield.setText(""+total);		
		calcamtfield.setText(""+cal);
		

	}
}