A question for Java programmers

How do I make Java store variables and load them? Kinda like a save game?
BTW, the game I am making is a 100% text game.
Thanks in advance. :)

You could use an SQLite embedded database!
If you want something simpler/safer, write your own file-based save system.

Um.. but I’m just a beginner o.O But yeah, I was trying to find a save system.

to be honest ooflorents idea of sql databases is the best you are going to get…but if you insist on not following that root then you could also use javas file io classes, some basic tutorials here……

http://docs.oracle.com/javase/tutorial/essential/io/

Ow. I don’t really get it, guess I’ll just not make the save system :/ Guess I’ll have some revision to do….

Serialization would probably be easiest. It’s surprisingly not difficult.
http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html

Thanks! But it would be a bit too hard to put the code into the game, since it means I would have to change a lot of things. Any way to put my database(with variables inside) into a textfile and load it later?

Save to file and you yourself decide on a way to interpret the data upon reading the file.

e.g.:
Scanner s = new Scanner(new File(“savedata.txt”));
int numRobots = s.nextInt();

If you end up using databases it may be a good idea to use something like Hibernate" to manage your persistence. If you’re going to allow the user to input data that will then get added to the database it’s very important to sanitize the data first as sql injection can be a major issue. Here is an article that gives a good short overview of prevention in Java SQL injection prevention

I guess injections could be pretty dangerous o.O But I don’t think most people will care to do that to a simple useless text game o.O

Ty strumpetdreams and silkenshadow. One very last question.. where would be the file be stored?

You get to specify, but they are usually relative from the root directory of the executable (i.e.: the same directory as the .class being run, the .jar, or where the java command was called from). I believe there is a way to stash it into a user’s home directory in a clever way, depending on the OS. That would require some googling.

Though I strongly recommend picking up skills like hibernate or serialization anyway, eventually. ^_