java - 如何解决 VScode UnsupportedClassVersionError？

Question

问题

当我运行 HelloWorld 时，它返回:

"java.lang.UnsupportedClassVersionError: HelloWorld has been compiled by a more recent version of the Java Runtime (class file version 52.65535), this version of the Java Runtime only recognizes class file versions up to 52.0 "

我该如何解决这个问题？

截图

代码

public class HelloWorld{
    public static void main(String[] args) {
        System.out.println("123");
    }
}

Answer 1

此问题与 Java 调试器扩展有关。我有同样的问题，它已记录在问题日志中:https://github.com/Microsoft/vscode-java-debug/issues/555

问题仅出在像 HelloWorld 这样的单文件应用程序中。运行maven项目就ok了。

Medsonk 的指导对我有用:https://github.com/Microsoft/vscode-java-debug/issues/555#issuecomment-478464496

summary:
1. make sure uninstall jdk8 clean
2. install jdk11
3. add "vmArgs": "--enable-preview" in launch.json
4. F1, "Java: Clean ……" and "Java: Force ……"
5. run standalone file again