May 2001
Intermediate to advanced
1088 pages
30h 13m
English
Content preview from Special Edition Using Java™ 2 Enterprise Edition
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Troubleshooting
Accessing Properties
| Q1: | Why do I have strange properties like "class" that aren't in my bean? |
| The introspector is picking up properties and methods from the superclass. Use the optional "stop class" parameter to tell the introspector where to stop. For example, if your class extends java.lang.Object, pass Object.class as the second parameter of the getBeanInfo class. | |
| Q2: | Why do I get a NullPointerException when I access a particular property? |
| The introspector reports a property if it sees either a get or a set method; it doesn't need to see both. If you have a get method with no corresponding set method, the getWriteMethod method in the PropertyDescriptor object returns null. The getReadMethod method returns null if there is no |
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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