The reason is that we need references to both ProgressBars as arguments to the callback, and at the time the Scale constructor is invoked, they are not all defined yet.
原因在于，我们需要以对两个ProgressBar的引用作为回调的参数，而当Scale构造函数被调用时，它们还没有被定义。
To support JMS applications, we need to configure JNDI with references to the JMS resources in the bus. We need to define three JMS resource references in the JNDI directory.
为了支持JMS应用程序，需要在总线中配置关于JMS资源的JNDI。
To support JMS applications, we need to configure JNDI with references to the JMS resources in the bus. We need to define three JMS resource references in the JNDI directory.
为了支持JMS应用程序，需要在总线中配置关于JMS资源的JNDI。
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