Question

java中我传递的对象不为空,可是调用对象的方法时报空指针,怎么回事?

Exception in thread "main" java.lang.NullPointerException
at java.lang.Class.searchFields(Unknown Source)
at java.lang.Class.getDeclaredField(Unknown Source)
at com.thoughtworks.xstream.core.util.Fields.find(Fields.java:25)
at com.thoughtworks.xstream.mapper.AttributeMapper.getField(AttributeMapper.java:171)
at com.thoughtworks.xstream.mapper.AttributeMapper.addAttributeFor(AttributeMapper.java:167)
at com.thoughtworks.xstream.XStream.useAttributeFor(XStream.java:1085)
at com.flex.convert.TestConvert.useAttribute(TestConvert.java:84)
at com.flex.convert.TestConvert.formatSingleCon(TestConvert.java:136)
at com.flex.convert.TestConvert.convertXML(TestConvert.java:50)
at com.flex.convert.TestConvert.main(TestConvert.java:187)
这是怎么回事啊，搞了2个小时了都！

若以下回答无法解决问题，邀请你更新回答

Answer 1

是不是LIST中压根就没数据啊

Answer 2

你不把源码贴出来，你把错误信息贴出来有什么用啊！…

追问

刚把问题贴出来就找到原因了，list中添加的值有个是null的。我日了

Answer 3

你传进来的时候应该是空的！！！DEBUG一下看看。