Abstract class in Java 5 or previous

Question

I read in a book (Programmez en Java 5 et 6 from Claude Delonne in French) that in Java 5 and its previous versions, if you have an abstract method in a class, then this class is abstract, and it is not necessary to mention the keyword abstractin front of the class.

Is this statement true? I tried to find the Java SE 5 specification, but it is not available.

Answer 1

Oracle publishes JLS returning to Java 6: https://docs.oracle.com/javase/specs/ I'm not sure that JLS for Java 5 is available on the Internet.

, , , Java :

(§8.4.3.1, § 9.4), , , , , .

: , , , .

Answer 2

abstract, abstract , java .

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