java.lang.NumberFormatException error in Selenium Java-CodePudding

I'm newcomer to java selenium. I'm trying to automate and I have failed. I need to verify the unit price of the product I added to the cart and the price that will occur when I add 1 more of the same product, but I get the error "Exception in thread"main" java.lang.NumberFormatException".

That's my code:

//check the amount to be paid to the products
String unitPrice = driver.findElement(By.xpath("//span[@class='m-basket-card__price m-basket-card__price--main']")).getText();
System.out.println("single price of the product= "   unitPrice);
String totalPrice = driver.findElement(By.xpath("//sub[@class='js-card-price']")).getText();
System.out.println("total price of the cart = "   totalPrice);
Assert.assertEquals(totalPrice, Integer.parseInt(unitPrice * 2));

I get the error on the last line.

I tried to multiply the price of the product by 2 to verify the price of 2 of the same product. I converted string to int value. But it gave an "Exception in thread "main" java.lang.NumberFormatException" error.

CodePudding user response：

You have to convert the totalPrice to int and also multiply the unitPrice as below:

Assert.assertEquals(Integer.parseInt(totalPrice),Integer.parseInt(unitPrice)*2);

If unitPrice and totalPrice return float:

Assert.assertEquals(Float.parseFloat(totalPrice),Float.parseFloat(unitPrice)*2);