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1 回答

要么是student对象没有,要么就是student兑现下面的courses对象没有创建

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0 回复 有任何疑惑可以回复我~

一样,我的也报这个错

0 回复 有任何疑惑可以回复我~
#1

180416 提问者

student对象没有创建
2020-11-20 回复 有任何疑惑可以回复我~
#2

小志冲冲冲 回复 180416 提问者

我也是和你一样的空指针异常 你是咋改的 我创建了学生类对象呀
2021-04-09 回复 有任何疑惑可以回复我~

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