Master of Science thesis Fighting Spam

}
{
}
if(amountPanel.getText().length() == 0)
return "Please fill in the field \"" + labels[0] + "\"";
if(logonInformationPanel.textFields[0].getText().length() == 0)
return "Please fill in the field \"" + labels[1] + "\"";
if(logonInformationPanel.textFields[1].getText().length() == 0)
return "Please fill in the field \"" + labels[2] + "\"";
return "";
private class textFieldListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
try
{
//Filled in correctly?
String check = checkFields();
if(check.length() != 0)
{
frame.showError(check);
return;
}
}
}
frame.withdraw(Double.parseDouble(amountPanel.getText()),
logonInformationPanel.textFields[0].getText(),
logonInformationPanel.textFields[1].getText());
}
catch(Exception ex)
{
Debugger.debug(className, 3, "Could not withdraw.", ex);
}
10.1.5 MailHandler
10.1.5.a CoinHeader
package SpamCash.Client.MailHandler;
import org.logi.crypto.sign.Signature;
import java.security.cert.Certificate;
import SpamCash.Currency.Coin;
import java.io.IOException;
import java.security.cert.CertificateEncodingException;
public class CoinHeader implements java.io.Serializable
{
//Signatures
private byte[] s1, s2;
private String hashFunc;
public Coin coin;
public Certificate cert;
public CoinHeader(Signature s1,Signature s2,Coin coin,Certificate cert) throws
IOException
{
this.s1 = s1.getBytes();
this.s2 = s2.getBytes();
this.hashFunc = s1.getHashFunc();
this.coin = coin;
this.cert = cert;
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