Inspectopedia
 
2024.3

Unnecessary boxing

Warning
New
Last modified: 03 December 2024

Reports explicit boxing, that is wrapping of primitive values in objects.

Explicit manual boxing is unnecessary as of Java 5 and later, and can safely be removed.

Examples:

  • Integer i = new Integer(1);Integer i = Integer.valueOf(1);

  • int i = Integer.valueOf(1);int i = 1;

Use the Only report truly superfluously boxed expressions option to report only truly superfluous boxing, where a boxed value is immediately unboxed either implicitly or explicitly. In this case, the entire boxing-unboxing step can be removed. The inspection doesn't report simple explicit boxing.

This inspection only reports if the language level of the project or module is 5 or higher.