Method call in loop condition

Reports method calls in the condition part of a loop statement. In highly resource constrained environments, such calls may have adverse performance implications.

Applying the results of this inspection without consideration might have negative effects on code clarity and design. This inspection is intended for Java ME and other highly resource constrained environments.

Example:

String s = "example";
for (int i = 0; i < s.length(); i++) {
  System.out.println(s.charAt(i));
}

After the quick-fix is applied:

String s = "example";
int length = s.length();
for (int i = 0; i < length; i++) {
  System.out.println(s.charAt(i));
}

Use the option to ignore calls to common Java iteration methods like Iterator.hasNext() and known methods with side-effects like Atomic*.compareAndSet.

Inspection options

Option	Type	Default
Ignore known methods with side-effects	Checkbox	true

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Java, 233.SNAPSHOT

Last modified: 13 July 2023