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Interview: do you understand the packing and unpacking operations?
2022-06-12 16:11:00 【Sleepless autumn rain】
● Packing ： Basic data type -> Reference data type
● Unpacking ： Reference data type -> Basic data type
Boxing is actually calling the wrapper class valueof() Method , Unpacking calls the xxxValue() Method .
Frequent unpacking and boxing operations may cause performance problems .
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