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找了一个多小时,才发现原来是要提供一个没有参数的构造方法才可以。想了一下,可能因为Eclipse最终是使用Class.newInstance()的方式来生成界面元素的,所以有这个要求。
算是一个经验吧,我觉得Eclipse的帮助再丰富些就好了,特别是应该提供更多的例子代码。
顺便推荐下面两篇文章(要是Eclipse帮助都这么详细该多好):
找了一个多小时,才发现原来是要提供一个没有参数的构造方法才可以。想了一下,可能因为Eclipse最终是使用Class.newInstance()的方式来生成界面元素的,所以有这个要求。
算是一个经验吧,我觉得Eclipse的帮助再丰富些就好了,特别是应该提供更多的例子代码。
顺便推荐下面两篇文章(要是Eclipse帮助都这么详细该多好):