// Calculation of Amount
double feeperqtr = 0.0,concess = 0.0,feetopay=0.0;
if (jRadioButton1.isSelected())
feeperqtr=2000;
else if (jRadioButton2.isSelected())
feeperqtr=2500;
else if (jRadioButton3.isSelected())
feeperqtr=2300;
if (jCheckBox1.isSelected())
concess= (0.07*feeperqtr);
feetopay=feeperqtr-concess;
jTextField2.setText("" + feeperqtr);
jTextField3.setText(" " + concess);
jTextField4.setText(" " + feetopay);
(ii) jTextField1.setText(" ");
jTextField2.setText(" ");
jTextField3.setText(" ");
jTextField4.setText("");
jRadioButton1.setSelected(false);
jRadioButton2.setSelected(false);
jRadioButton3.setSelected(false);
jCheckBox1.setSelected(false);
system.exit(0)