小编tch*_*son的帖子

Runnable runPickWinner = new Runnable() {
        @Override
        public void run() {
            mPot.pickWinner();
        }
    };
ScheduledExecutorService execPickWinner = Executors.newScheduledThreadPool(1);
execPickWinner.scheduleAtFixedRate(runPickWinner, runPickWinnerTime.longValue(), runPickWinnerTime.longValue(), TimeUnit.MINUTES);

我收到以下错误：

java.lang.IllegalArgumentException
    at java.util.concurrent.ScheduledThreadPoolExecutor.scheduleAtFixedRate(Unknown Source) ~[?:1.8.0_131]
    at com.tchristofferson.Lottery.runLottery(Lottery.java:223) ~[?:?]
    at com.tchristofferson.Lottery.onEnable(Lottery.java:50) ~[?:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:271) ~[craftbukkit.jar:git-Bukkit-c19c293]
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:329) [craftbukkit.jar:git-Bukkit-c19c293]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404) [craftbukkit.jar:git-Bukkit-c19c293]
    at org.bukkit.craftbukkit.v1_11_R1.CraftServer.enablePlugin(CraftServer.java:361) [craftbukkit.jar:git-Bukkit-c19c293]
    at org.bukkit.craftbukkit.v1_11_R1.CraftServer.enablePlugins(CraftServer.java:323) [craftbukkit.jar:git-Bukkit-c19c293]
    at net.minecraft.server.v1_11_R1.MinecraftServer.t(MinecraftServer.java:411) [craftbukkit.jar:git-Bukkit-c19c293]
    at net.minecraft.server.v1_11_R1.MinecraftServer.l(MinecraftServer.java:372) [craftbukkit.jar:git-Bukkit-c19c293]
    at net.minecraft.server.v1_11_R1.MinecraftServer.a(MinecraftServer.java:327) [craftbukkit.jar:git-Bukkit-c19c293]
    at net.minecraft.server.v1_11_R1.DedicatedServer.init(DedicatedServer.java:244) [craftbukkit.jar:git-Bukkit-c19c293]
    at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:521) [craftbukkit.jar:git-Bukkit-c19c293]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]

这似乎是 上的一个错误scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit)，但没有意义它们是 Integer …

我正在更新 Spigot (Minecraft) 插件，最新版本的 Spigot 需要 Java 16。在我的 pom 中，我将 maven 编译器插件目标更改为 16，源代码仍然是 1.8。现在我收到以下错误：

Failed to execute goal org.apache.maven.plugins:maven-shade-plugin:3.2.4:shade (default) on project Plugin: Error creating shaded jar: Problem shading JAR C:\Users\Trent\workspace\Stocks\Plugin\target\Plugin-1.0-SNAPSHOT.jar entry com/tchristofferson/stocks/commands/StockbrokerCommand.class: java.lang.IllegalArgumentException: Unsupported class file major version 60

pom：

<?xml version="1.0" encoding="UTF-8"?>

4.0.0

<groupId>com.tchristofferson</groupId>
<artifactId>Stocks</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<modules>
    <module>API</module>
    <module>Plugin</module>
</modules>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.1</version>
            <configuration>
                <source>1.8</source>
                <target>16</target>
                <release>16</release>
            </configuration>
        </plugin>
    </plugins>
</build>

<distributionManagement>
    <snapshotRepository>
        <id>ossrh</id>
        <url>https://oss.sonatype.org/content/repositories/snapshots</url>
    </snapshotRepository>
    <repository>
        <id>ossrh</id>
        <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
    </repository>
</distributionManagement>