当转换依赖于同一插件中被检测的父类型时，检测子类

public abstract class Plugin {
    public abstract void execute();
}

public class PluginA extends Plugin {
    @Override
    public void execute() {
        System.out.println("PluginA executed");
    }
}

public class PluginB extends Plugin {
    @Override
    public void execute() {
        System.out.println("PluginB executed");
    }
}

Plugin plugin = getPlugin(); // 假设这是从插件系统中获取的插件对象

if (plugin instanceof PluginA) {
    PluginA pluginA = (PluginA) plugin;
    pluginA.execute();
} else if (plugin instanceof PluginB) {
    PluginB pluginB = (PluginB) plugin;
    pluginB.execute();
}

Plugin plugin = getPlugin(); // 假设这是从插件系统中获取的插件对象

try {
    if (plugin.getClass().equals(PluginA.class)) {
        PluginA pluginA = (PluginA) plugin;
        pluginA.execute();
    } else if (plugin.getClass().equals(PluginB.class)) {
        PluginB pluginB = (PluginB) plugin;
        pluginB.execute();
    }
} catch (ClassCastException e) {
    e.printStackTrace();
}