Geek Answers Handbook

Save Game Data - Java

I created a rudimentary game with several objects. I would like to give the user of the program the ability to save and load the state of the program.

I researched several articles and read many overflow posts. I was surprised at the number of methods and the complexity of each of these methods.

Most methods require you to create a framework or skeleton of all the objects that I want to save, and then load them one by one, calling each object manually and then returning it back to its type and data class.

Yes, I am new to programming. But I do not ask for distribution. I ask for a brief explanation.

I read the following article as I explored the idea of ​​outputting to an XML file.

http://www.mkyong.com/java/how-to-create-xml-file-in-java-dom/

As I said, I am new to programming. Should I learn XML in tandem with Java?

My question is this:

A) Does my IDE, when it is successfully compiled, not know how many objects I have, their data type and what class they belong to?

B) Is there a way to save ALL objects without specifying them separately.

c) I overloaded the complexity of maintaining a simple program?

+4
source share
3 answers

Should I learn XML in tandem with Java?

There is no reason if you do not want to learn XML or think XML is a good option for your application. There are many ways to serialize without XML.

Does my IDE, when successfully compiling, not know how many objects I have, their data type and what class they belong to?

, . Java, , .

Foo[] foos = new Foo[ new Scanner(System.in).nextInt() ];
for(int i = 0; i < foos.length; ++i)
    foos[i] = new Foo();

( Foo ? .)

, .

B) , .

, Serializable. . , .

class FooState implements Serializable {
    Integer a, b, c; // Integer and String
    String d, e, f;  // also implement Serializable
}

class Foo {
    static FooState allMyState = new FooState();

    public static void main(String[] args) throws IOException {
        try(ObjectOutputStream oos = new ObjectOutputStream(
                new FileOutputStream(new File("myFile.data")))) {
            // no need to specify members individually
            oos.writeObject(allMyState);
        }
    }
}

, , , JSON, XML ..

, , .

c) ?

. , .

+4

A) IDE , , ?

IDE . , , , .

, , - , , , , . , , XML, JSON ( ).

B) , .

, , JVM . , - , JVM ( Just-In-Time, " " ). . , - . , , . , .

C) ?

, Game Game(String name) ( ). , new Game("firstGame"). . , , . , , , . , , JSON JSON (, Jackson).

+2

, .

public class Game{
    int coOrdinateX;
    int coOrdinateY;
    int score;
    String[] powersCurrentlyTheUserHad;
    ...
}

, . , , .

Serialization is a way of storing objects on disk (essentially files), so when de-serializing using library functions, you immediately return the object with the current state.

check out   http://www.tutorialspoint.com/java/java_serialization.htm for more details.

0
source

More articles:


All Articles