如何处理“java：没有枚举常量 javax.lang.model.element.Modifier.SEALED”构建错误？

Question

对于大学项目，我们需要实现一个服务器“注册器”，它通过 SSL RMI 连接与客户端“barowner”进行通信。构建客户端时，出现错误 java: No enum Constant javax.lang.model.element.Modifier.SEALED 构建错误。服务器构建没有任何问题。

BarownerMain.java

package com.example.BarOwner;

import com.example.registrar.RegistrarInterface;

import javax.rmi.ssl.SslRMIClientSocketFactory;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.rmi.NotBoundException;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;

public class BarOwnerMain {
    public static void main(String[] args) throws RemoteException {

        String pass = "password";
        System.setProperty("javax.net.ssl.debug", "all");
        System.setProperty("javax.net.ssl.keyStore", System.getProperty("user.dir") + "/keys/raynaud.jks");
        System.setProperty("javax.net.ssl.keyStorePassword", pass);
        System.setProperty("javax.net.ssl.trustStore", System.getProperty("user.dir") + "/keys/raynaud.jks");
        System.setProperty("javax.net.ssl.trustStorePassword", pass);

        Registry registrarRegistry;
        RegistrarInterface registrarInterface;
        try {
             registrarRegistry = LocateRegistry.getRegistry(
                    InetAddress.getLocalHost().getHostName(), 1112,
                    new RMISSLClientSocketFactory());
            registrarInterface = (RegistrarInterface) registrarRegistry.lookup("RegistrarService");
            BarOwnerMenu.showMenu(registrarInterface);
        } catch (RemoteException | NotBoundException e) {
            throw new RuntimeException(e);
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }

    }
}

我已经尝试按照JDK-8244367中的描述编辑 javax.lang.module但 IntelliJ 不允许我这样做。任何帮助，将不胜感激！

Answer 1

Try to change the SDK version to 15, and then return it to the updated version. You can change your DSK version in the "Project Structure", shortcut to get there:

ctrl+alt+shift+S

IntelliJ 中的“项目结构”窗口

Make sure you click the "Apply" button.

它帮助我解决同样的问题。