根据
The Java Tutorials,在
Java SE 7和更高版本中,您可以在switch语句的表达式中使用String对象.
String s = ...
switch(s){
//do stuff
}
但这是真的吗？我已经安装了JRE并将其添加到Eclipse项目的构建路径,但是我收到以下编译时错误：
Cannot switch on a value of type
String. Only convertible int values or
enum constants are permitted
此外,我想我已经配置正确,因为我可以使用其java.nio.file.Files类以及JLayer.
有任何想法吗？
虽然JDT团队确实实施了
Switch on String feature,但对Java 7的支持不会在Eclipse 3.7.1之前：
见bug 288548：
Due to late availability of JSR-292 (Invoke Dynamic) and JSR-334 (Project Coin)
and due to the official release date (July 28,2011) of Java 7 being after 3.7
ships we had to defer the Java 7 support to 3.7.1. It has not yet been decided
whether this will be available as part of the 3.7.1 downloads or as separate
feature update.
The work for the Java 7 features is currently in progress in the ‘BETA_JAVA7’ branch and we will deliver separate updates for the stable builds in order to provide early access to the Java 7 features for interested parties.
