Java泛型之Incompatible Types List ArrayList

2021-12-18 — Written by firefoxking
#问题解决 
incompatible types: ArrayList<ArrayList> cannot be converted to List<List>。
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Java8接口多继承问题

2021-09-16 — Written by firefoxking
#java  #继承 
Java8提供了接口默认方法，产生了实现多继承类似的问题。
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