在java反射中找不到方法

我正试图用以下代码从我的对象中提取方法:

Method[] methods = instance.getClass().getMethods();

for (Method m : methods) {
    System.out.println(">>> " + m.getName());
    for (Class c : m.getParameterTypes()) {
        System.out.println("\t->>> " + c.getName());
    }
}

Object method = instance.getClass().getMethod("initialize", ComponentContext.class);

它打印以下输出:

>>> initialize
->>> org.hive.lib.component.ComponentContext
java.lang.NoSuchMethodException: org.hive.sample.Calculator.initialize(org.hive.lib.component.ComponentContext)
at java.lang.Class.getMethod(Class.java:1624)
at org.hive.container.lib.Component.hasRightParent(Component.java:140)
at org.hive.container.lib.Component.<init>(Component.java:118)
at org.hive.container.lib.ComponentController$AppLoader.execute(ComponentController.java:107)
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:557)

原始源代码:

class Calculator {
    @Override
    public void initialize(ComponentContext context) {
        //  Do nothing
    }
}

发生了什么?

添加: 我已将获取方法更改为:

Object method = instance.getClass().getMethod("initialize", org.hive.lib.component.ComponentContext.class);

但仍有例外

添加2: instance 对象是用JCL从JAR中实例化的,这可能是问题所在吗?