This tutorial will teach you Advanced Employee Salary Calculation System Using Java step by step. Paste the code inside the cal button double empname,sal,etf,epf,etfamount,epfamount,gsal,allow,nsal; private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { sal = Double.parseDouble(txtsal.getText()); if(chketf.isSelected()== true) { etfamount = sal * 10/100; } if(chketf.isSelected()== true) { epfamount = sal * 5/100; } txtetf.setText(String.valueOf(etfamount)); txtepf.setText(String.valueOf(epfamount)); gsal = sal - (etfamount + epfamount); txtgsal.setText(String.valueOf(gsal)); …