# Remove Inherited Interfaces from Class Declaration
# Description
This rule removes interfaces from class declaration, which are already implemented by a super class. These interfaces are inherited from the super class.
# Benefits
Removing redundant syntax improves readability.
# Tags
# Code Changes
Pre
class Child extends Parent implements Observer {
@Override
public void update(Observable o, Object arg) {
// do nothing
}
}
class Parent implements Observer {
@Override
public void update(Observable o, Object arg) {
// do nothing
}
}
Post
class Child extends Parent {
@Override
public void update(Observable o, Object arg) {
// do nothing
}
}
class Parent implements Observer {
@Override
public void update(Observable o, Object arg) {
// do nothing
}
}
🛠️ Auto-refactor Available
You can auto-refactor this with jSparrow.
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# Properties
| Property | Value |
|---|---|
| Rule ID | ReImplementingInterface |
| First seen in jSparrow version | 2.2.0 |
| Minimum Java version | 1 |
| Remediation cost | 2 min |
| Links |