What Does the Ellipsis (...) Mean in a Java Method Signature?

Ellipsis in Method Signature: Java Varargs

In the App Engine documentation, the ellipsis (...) appearing in the method signature public MessageBuilder withRecipientJids(JID... recipientJids) represents the use of Java variable arguments (varargs).

Varargs enable the method to accept any number of arguments of the specified type (JID in this case). This provides flexibility in passing multiple arguments to the method. For example:

• withRecipientJids(jid1, jid2): Pass two arguments.
• withRecipientJids(jid1, jid2, jid78_a, someOtherJid): Pass four arguments.

Varargs are supported in Java through the syntax type... variableName. For more information on Java varargs, refer to the Java documentation: http://java.sun.com/j2se/1.5.0/docs/guide/language/varargs.html

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