long df = Math.abs(lk1.getTime() - lk2.getTime()); long deiffrent = TimeUnit.DAYS.convert(df, TimeUnit.MILLISECONDS); day.setText(String.valueOf(deiffrent)); if (day.getText().equals("")) { JOptionPane.showMessageDialog(null, "Day field is empty"); return; } int days = Integer.parseInt(day.getText()); if (numofroom.getText().

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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public void actionPerformed(ActionEvent ae) {
try {
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy", Locale.ENGLISH);
Date lk1 = from.getDate();
Date lk2 = to.getDate();
long df = Math.abs(lk1.getTime() - lk2.getTime());
long deiffrent = TimeUnit.DAYS.convert(df, TimeUnit.MILLISECONDS);
day.setText(String.valueOf(deiffrent));
if (day.getText().equals("")) {
JOptionPane.showMessageDialog(null, "Day field is empty");
return;
}

int days = Integer.parseInt(day.getText());
if (numofroom.getText().equals("")) {
JOptionPane.showMessageDialog(null, "Number of rooms field is empty");
return;
}

int room = Integer.parseInt(numofroom.getText());

if (ae.getSource() == studio){

double f = room * 300 * days;
String a = String.valueOf(f);
double vat1 = f * 0.15;
String b = String.valueOf(vat1);
double total1 = f + vat1;
String c = String.valueOf(total1);
if (ae.getSource() == calculate) {
ty.setText("STUDIO" + "," + lk1 + "," + lk2);
subtotolfield.setText(a);
vat_f.setText(b);
totolfield.setText(c);
}}
  
else if (ae.getSource() == stander){

double q = room * 100 * days;
String a1 = String.valueOf(q);
double vat = q * 0.15;
String b1 = String.valueOf(vat);
double total = q + vat;
String c1 = String.valueOf(total);
if (ae.getSource() == calculate) {
ty.setText("stander" + "," + lk1 + "," + lk2);
subtotolfield.setText(a1);
vat_f.setText(b1);
totolfield.setText(c1);
}
}
  
} catch (NumberFormatException s) {
System.err.print(s);

}
}
}

the tow optione display the same value what is wrong

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