codeql/java/ql/src/Advisory/Declarations/MissingOverrideAnnotation.java

class Rectangle
{
    private int w = 10, h = 10;
    public int getArea() { 
        return w * h; 
    }
}
 
class Triangle extends Rectangle
{
    @Override  // Annotation of an overriding method 
    public int getArea() { 
        return super.getArea() / 2; 
    }
}