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Java Java Data Structures - Retired Exploring the Java Collection Framework Using ArrayLists

Kevin Faust
Kevin Faust
15,353 Points
Posted by Kevin Faust
Kevin Faust
15,353 Points

serialization made this code all messed up

Treet originalTreet = treets[0];
    System.out.println("Hastags:");
    for (String hastag : originalTreet.getHashTags()) {
     System.out.println(hastag); 
    }

i dont understand this. we did Treet[] treets = Treets.load(); which does some deserialization stuff. and then we create a new treet object equal to treets[0]. why [0]..is there anything more in that array? and then i get how we loop through the originaltreet object but why are we looping. i thought originaltreet only has one thing inside it? help pls

1 Answer

Cory Madden
Cory Madden
7,120 Points

Treet[] treets = Treets.load() creates a list of Treet objects. treets[0] is going to be a Treet object, you're just creating a new variable to reference that Treet. When you loop you're looping through all the tags in getHashTags(), which is an array of String objects.

Kevin Faust
Kevin Faust
15,353 Points
Kevin Faust
Kevin Faust
15,353 Points

hey cory,

what if we did treets[1]?

Kevin Faust
Kevin Faust
15,353 Points
Kevin Faust
Kevin Faust
15,353 Points

ohh nvm i understand now. [0] was just as an example. we couldve went up to [57]