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Java Java Data Structures Organizing Data Serialization

Kabir Gandhiok
Kabir Gandhiok
12,553 Points
Posted by Kabir Gandhiok
Kabir Gandhiok
12,553 Points

Why do we create a 0 length treats array in the load method?

I cant seem to understand why a 0 length treats array is created in the load method? Appreciate it if anyone could explain this to me.. thanks!

Siyuan Ji
Siyuan Ji
3,651 Points
Siyuan Ji
Siyuan Ji
3,651 Points

Same question here ! Can anyone explain why the 0 length array can be replaced by the new array? In previous course the instructor has mentioned that the size of an array cannot be modified, then how does it work here?

Roy Korenblit
Roy Korenblit
1,209 Points

Same question. Don't understand how the length of the array can change to the length of the casted object array.

1 Answer

Pavle Delic
Pavle Delic
8,088 Points
Pavle Delic
Pavle Delic
8,088 Points

Hi, 0 length array is created so if anything goes wrong with the rest of the code, method have something to return. And second concern is about array changing it's length... It really doesn't.

treets = (Treet[]) ois.readObject();

From this point in the code, "treets" doesn't point to the place in memory previously reserved. It is abandoned now, destroyed. This actually overwrites whatever "threets" was, with newly created array of treets ((Treet[]) ois.readObject()).