Inspectopedia 2025.2 Help

Use of obsolete collection type

Reports usages of java.util.Vector, java.util.Hashtable and java.util.Stack.

Usages of these classes can often be replaced with usages of java.util.ArrayList, java.util.HashMap and java.util.ArrayDeque respectively. While still supported, the former classes were made obsolete by the JDK1.2 collection classes, and should probably not be used in new development.

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.

UseOfObsoleteCollectionType
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 | Code maturity

Use the Ignore obsolete collection types where they are required option to ignore any cases where the obsolete collections are used as method arguments or assigned to a variable that requires the obsolete type. Enabling this option may consume significant processor resources.

Inspection options

Here you can find the description of settings available for the Use of obsolete collection type inspection, and the reference of their default values.

Ignore obsolete collection types where they are required

Default value:

Selected

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection UseOfObsoleteCollectionType

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details

By default bundled with:

IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025