Sales Inventory System in Java

In this tutorials will teach Sales Inventory in Java in step by step. If you interest in learning inventory management system in java this is the right place. where you will learn.

Paste code inside Calculate Button

double price;
        double discount;
        double sum;
        
        if(CboProduct.getSelectedItem().equals("Dell laptop") && CboCategory.getSelectedItem().equals("Computers"))
        {
            price = 65000;
            discount = price * 10/100;
            sum = price - discount;
            lblUprice.setText(String.valueOf(price));
            lblDis.setText(String.valueOf(discount));
            lblTot.setText(String.valueOf(sum));
        }
         else if(CboProduct.getSelectedItem().equals("Note book") && CboCategory.getSelectedItem().equals("Computers"))
        {
            price = 55000;
            discount = price * 5/100;
            sum = price - discount;
            
            lblUprice.setText(String.valueOf(price));
            lblDis.setText(String.valueOf(discount));
            lblTot.setText(String.valueOf(sum));
        }
         else if(CboProduct.getSelectedItem().equals("Digital camara") && CboCategory.getSelectedItem().equals("Cameras"))
        {
            price = 45000;
            discount = price * 8/100;
            sum = price - discount;
            
            lblUprice.setText(String.valueOf(price));
            lblDis.setText(String.valueOf(discount));
            lblTot.setText(String.valueOf(sum));
        }
         else if(CboProduct.getSelectedItem().equals("Pen drive") && CboCategory.getSelectedItem().equals("Electronics"))
        {
            price = 15000;
            discount = price * 3/100;
            sum = price - discount;
            
            lblUprice.setText(String.valueOf(price));
            lblDis.setText(String.valueOf(discount));
            lblTot.setText(String.valueOf(sum));
        }
         else if(CboProduct.getSelectedItem().equals("Soft set") && CboCategory.getSelectedItem().equals("Furniture"))
        {
            price = 150000;
            discount = price * 25/100;
            sum = price - discount;
            
            lblUprice.setText(String.valueOf(price));
            lblDis.setText(String.valueOf(discount));
            lblTot.setText(String.valueOf(sum));
        }
        else
         {
             JOptionPane.showMessageDialog(this, "Choose the Right Product");
         }

I have attached the video tutorial below it will help you  to do this  step by step.