java - 在Java中，return语句可以出现在什么地方？

Question

除了在方法/构造函数体内？

此外，构造函数可以返回一些东西吗？还是我可以只使用“return;”，后面没有任何表达式？

Answer 1

In Java, where can a return statement appear? Besides inside a method/constructor body?

仅在构造函数或方法中:

JLS-http://java.sun.com/docs/books/jls/second_edition/html/statements.doc.html#6767

A return statement returns control to the invoker of a method (§8.4, §15.12) or constructor (§8.8, §15.9).

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Also, is there something that can be returned by a constructor?

没有

JLS-http://java.sun.com/docs/books/jls/second_edition/html/statements.doc.html#6767

A return statement with an Expression must be contained in a method declaration that is declared to return a value (§8.4) or a compile-time error occurs.

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Or can I only use "return;" without any Expression following it?

是

JLS-http://java.sun.com/docs/books/jls/second_edition/html/statements.doc.html#6767

A return statement with no Expression must be contained in the body of a method that is declared, using the keyword void, not to return any value (§8.4), or in the body of a constructor (§8.8)