1. All Inspections
  2. Java
  3. Verbose or redundant code constructs
  4. Redundant array length check

Redundant array length check

Last modified: 03 December 2024

Reports unnecessary array length checks followed by array iteration. When array length is zero, the iteration will be skipped anyway, so there's no need to check length explicitly.

Example:

void f(String[] array) {
  if (array.length != 0) { // unnecessary check
    for (String str : array) {
      System.out.println(str);
    }
  }
}

A quick-fix is suggested to unwrap or remove the length check:

void f(String[] array) {
  for (String str : array) {
    System.out.println(str);
  }
}

Locating this inspection

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RedundantLengthCheck
Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Java | Verbose or redundant code constructs

New in 2022.3

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,

Can be installed with plugin:

Java, 243.23126