The Java Tutorials have been written for JDK ключевое слово. Examples and practices described in this page don’t take advantage of improvements introduced in later releases and might use technology no longer available. See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.
See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases. Here is a list of keywords in the Java programming language. You cannot use any of the following as identifiers in your programs. The keywords const and goto are reserved, even though they are not currently used. The Java Tutorials have been written for JDK 8. Examples and practices described in this page don’t take advantage of improvements introduced in later releases and might use technology no longer available. See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.
See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases. Accessing Superclass Members If your method overrides one of its superclass’s methods, you can invoke the overridden method through the use of the keyword super. Subclass, which overrides the one in Superclass. Superclass, Subclass must use a qualified name, using super as shown.
Subclass Constructors The following example illustrates how to use the super keyword to invoke a superclass’s constructor. Invocation of a superclass constructor must be the first line in the subclass constructor. Note: If a constructor does not explicitly invoke a superclass constructor, the Java compiler automatically inserts a call to the no-argument constructor of the superclass. Object does have such a constructor, so if Object is the only superclass, there is no problem.