'Math.random()' cast to 'int'

Reports calls to Math.random() which are immediately cast to int.

Casting a double between 0.0 (inclusive) and 1.0 (exclusive) to int will always round down to zero. The value should first be multiplied by some factor before casting it to an int to get a value between zero (inclusive) and the multiplication factor (exclusive). Another possible solution is to use the nextInt() method of java.util.Random.

Example:

int r = (int)Math.random() * 10;

After the quick fix is applied:

int r = (int)(Math.random() * 10);

Locating this inspection

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Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

MathRandomCastToInt

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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 | Probable bugs

Inspection Details
By default bundled with:	IntelliJ IDEA 2024.2, Qodana for JVM 2024.2,
Can be installed with plugin:	Java, 242.22892

Last modified: 11 September 2024