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lang-java
object.clone()method does a shallow copy, so, in summary, the former will be susceptible to changes in the object, while your latter example is immune to changes to the object itself, but susceptible to changes in objects referred to by the clone.MyOtherClassare of primitive type. Otherwise I'd need a copy constructor.cloneis seldom a good idea :)MyOtherClassimmutable. The only reason not to is performance. In such case, copying it is also out of the question and you will just have to expose internals of your class.int[] myFieldin my class with a setter. The caller might set the array (with the setter) and then modfy the array in their code. Cloning the array onseteliminates the problem. It's not that I want to assign to a field only once (and final would make sense then).