'instanceof' check for 'this'
Reports usages of instanceof
or getClass() == SomeClass.class
in which a this
expression is checked.
Such expressions indicate a failure of the object-oriented design, and should be replaced by polymorphic constructions.
Example:
class Super {
void process() {
if (this instanceof Sub) { // warning
doSomething();
} else {
doSomethingElse();
}
}
}
class Sub extends Super {}
To fix the problem, use an overriding method:
class Super {
void process() {
doSomethingElse();
}
}
class Sub extends Super {
@Override
void process() {
doSomething();
}
}
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.
InstanceofThis- 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.
Availability
- By default bundled with
- Can be installed with plugin
Java, 241.18072
Last modified: 18 June 2024