IntelliJ错误 - 在-source 1.6错误中不支持java：try-with-resources。即使在项目设置中，也选择了1.7 JDK

Question

Under File -> Project Structure -> SDKs i have 1.7 jdk but i still get this error:

added.java: try-with-resources is not supported in -source 1.6 (use -source 7 or higher to enable try-with-resources)

I have restarted IDE but to no avail

Answer 1

Newer JVMs allow you to compile your code using compiler versions of lower JVM versions. For example, JDK 1.7 will allow you to compile your code using the 1.5 compiler.

See the "Cross compilation section" here http://docs.oracle.com/javase/7/docs/technotes/tools/windows/javac.html

What you need to do in Intellij, is to go to File -> Project Structure -> Project and select the "Project SDK" as 1.7 and the "Project Language Level" as 7.0

Answer 2

不得不点击'错误​​灯泡'图标（或Alt + Enter）并选择选项以启用加载多捕获，尝试使用资源，钻石......然后重新加载并重新启动IDE。

Answer 3

IntelliJ IDEA allows to set the language level on a project basis as well as on on module basis. If you have set the language level to Java 7 or higher on the project level, and are still getting this error message, right click on the module, select "Open module settings". Make sure the language level for the module is set to "Project default", or if for one reason, you want to set it specifically, it should be at least Java 7.

Answer 4

I had the same problem with IntelliJ 13. You have to set the language level, either for the entire project or individual modules, on the "General Settings for Project" dialog. See IntelliJ IDE gives error when using Try-Catch with Resources for the complete answer.