Java 字符串声明 IntelliJ IDEA

Question

Trying to declare a string in Java inside the main method of a Console application.

String s = "this is some text";

I get a red underline saying, 'class' or 'interface' expected.

If I change the code to read

String s = new String("this is some text"); 

everything works, or at least the code compiles. Using JDK 1.8 and have recently upgraded the IDE to version 2016.2.4.

This only occurs when declaring a new String, all other type declarations and initializations work without declaring a new instance, ie

int i = 0;

Anyone know why the first declaration won't work?

Similar behaviour is exhibited when trying to write to the console,

System.out.println("this is some text");

The word 'text' is red underlined saying 'class' or 'interface' expected.

EDIT: entire class as requested

package Sandbox;

public class Main {

    public static void main(String[] args) {
        System.out.println("this fails");
    }
}

however

package Sandbox;

public class Main {

    public static void main(String[] args) {
        System.out.println(new String("this works"));
    }
}

See screenshot below of actual code in the IDE. Comments welcome.

Answer 1

Looks like an issue with Language Injections in IntelliJ. https://www.jetbrains.com/help/idea/2016.2/using-language-injections.html

Disable the Language Injections. That should fix your Problem.

An similiar issue with the println method and string is described here and has been solved by unregistering println from string injections: https://intellij-support.jetbrains.com/hc/en-us/community/posts/206836685-System-out-println-hello-analyze-error