Cloneable class in secure context

Reports classes which may be cloned.

A class may be cloned if it supports the Cloneable interface, and its clone() method is not defined to immediately throw an error. Cloneable classes may be dangerous in code intended for secure use.

Example:

class SecureBean implements Cloneable {}

After the quick-fix is applied:

class SecureBean {}

When the class extends an existing cloneable class or implements a cloneable interface, then after the quick-fix is applied, the code may look like:

class SecureBean extends ParentBean {
    @Override
    protected SecureBean clone() throws CloneNotSupportedException {
        throw new CloneNotSupportedException();
    }
}

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.

CloneableClassInSecureContext

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 | Security

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 CloneableClassInSecureContext

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

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025