Читать книгу OCP Oracle Certified Professional Java SE 17 Developer Study Guide - Jeanne Boyarsky - Страница 175

Another common way the exam may try to lead you astray is by providing code where the boolean expression inside the if statement is not actually a boolean expression. For example, take a look at the following lines of code:

int hourOfDay = 1; if(hourOfDay) { // DOES NOT COMPILE … }

This statement may be valid in some other programming and scripting languages, but not in Java, where 0 and 1 are not considered boolean values.