IntelliJ 13中未解决的错误

Question

I've just setup IntelliJ 13 on my computer and set the SDK to jdk 1.7.0. I created a new project to test to see if everything is working right, but ran into a problem:

public class TestApp
{ 
    public static void main(String[] args)
    {
        System.out.println("Testing");
    }
}

String and System gives the error "Cannot resolve symbol." Has anyone else ran into this issue or know what's going on?

Answer 1

似乎您需要进入Project并选择一个有效的JDK。