Is parameter passing in Java passed by value or by reference?

It is generally believed that the transfer in Java is by value, and the transfer of instance objects in Java is by reference.

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What is passing by value and passing by reference?

Value transfer: A copy of the object is passed. Even if the copy is changed, it will not affect the source object;

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Passing by reference: What is passed is not the actual object, but a reference to the object; changes to external objects will be reflected in the actual object;

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