How do I back up ArrayList in Java?

• Java

I have some data stored as ArrayList When I want to back up this data, Java will always define two objects This means that when I change the value in the data ArrayList, the change will be backed up I tried to copy the data from the data to a circular backup, trying to use the method data Clone () – no help

Solution

I think you need it Clone() single object Clone ArrayList is not "deep"; It only clones references to objects

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