Number constructor call with primitive argument

Reports instantiations of new Long, Integer, Short, or Byte objects that have a primitive long, integer, short, or byte argument.

It is recommended that you use the static method valueOf() introduced in Java 5. By default, this method caches objects for values between -128 and 127 inclusive.

Example:

  Integer i = new Integer(1);
  Long l = new Long(1L);

After the quick-fix is applied, the code changes to:

  Integer i = Integer.valueOf(1);
  Long l = Long.valueOf(1L);

Locating this inspection

By ID

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

CachedNumberConstructorCall

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 | Numeric issues

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

Use the Ignore new number expressions with a String argument option to ignore calls to number constructors with a String argument.

Use the Report only when constructor is @Deprecated option to only report calls to deprecated constructors. Long, Integer, Short and Byte constructors are deprecated since JDK 9.

Inspection options

Here you can find the description of settings available for the Number constructor call with primitive argument inspection, and the reference of their default values.

Ignore new number expressions with a String argument: Not selected
Report only when constructor is @Deprecated: Default: Selected

Availability

By default bundled with: IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,
Can be installed with plugin: Java, 241.18072

Last modified: 18 June 2024