Tech Blog of Stephen Souness

Constructors are still super - eventually  Java 25 has introduced a change to the way that constructors work in the inheritance hierarchy. In previous versions of Java, if we have a class that extends another class then all constructors of the subclass have to either specify a constructor from the base class as the first operation or automatically have the default zero arguments constructor applied by default - or call on alternate constructor and get the subclass's constructor invoked via that. In Java 25 it is now valid to call super() later in the constructor. So, we could have the following as valid code... public class SomeBaseClass { SomeBaseClass () { System . out .println( "Hello from SomeBaseClass constructor" ); } } public class SomeSubClass extends SomeBaseClass { SomeSubClass () { System . out .println( "Hello from SomeSubClass constructor" ); super (); } } public class ConstructorDemo { static void main ()...