![]() The Integer.parseInt() method takes as input a String and returns an int value. In this post, I’ll discuss how to convert String in Java to int. You have two main errors that immediately leap to mind: First you're trying to parse the JTextField itself, not the text it holds (as pointed out by dantuch - 1+ to him). If you need to check whether the String can be converted before performing the conversion, use. int value '99'.toInteger () An alternative, which avoids using a deprecated method (see below) is. It is the application developer’s responsibility to perform any String to int conversions to fulfill business logic, such as calculating discounts, storing age, and so on. Use the toInteger () method to convert a String to an Integer, e.g. parseInt () parses String to int while valueOf () additionally wraps this int into Integer. valueOf () returns a wrapper object reference of the type. ![]() ![]() UI inputs in Web-based HTML, JSP, or Thymeleaf templates are transferred to backend Java applications as strings. So 'Grouping Separator' makes some sense for a international audience ) Integer.valueOf () returns an Integer object, while Integer.parseInt () returns an int primitive. A common requirement while programming in Java is to convert String to int. Note that unlike the corresponding method in the Integer class, this method is not required to cache values within a particular range.
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