What method is used to convert a string to an integer in Java?

The method used to convert a string to an integer in Java is Integer.parseInt(). This method is part of the Java Integer class, and it specifically takes a string representation of a number and attempts to convert it into an integer.

When you use Integer.parseInt(), it performs validation to ensure that the string provided is a valid numerical representation. If the string is not a valid integer format, a NumberFormatException is thrown, letting you know that the conversion failed.

This method is commonly used because it is straightforward and directly associated with the Integer class in Java, making it a reliable choice for converting strings to integers in any Java application. The need for a reliable conversion method arises from situations where user input or data fetched from a file might be in string format, yet you need it to be in an integer format for calculations or comparisons.

Other options provided do not correspond to valid methods in the Java API for this conversion. For instance, Integer.toInt() and convertInt() are not recognized methods in the Java Integer class. parseInt() without the Integer prefix would also not work since it is not a standalone method. Thus, Integer.parseInt() is the correct and standard method to use