Saving Hashmap To File

Hey guys, I have looked through some tutorials, cant seem to understand this...

I am trying to save a hashmap containing a String and a int variable to a file, where onEnable can read the file and set the hashmap to the one from the file, and onDisable will save the new hashmap to the file.

Here is the hashmap I am trying to save:

Code:

HashMap<String, Integer> credits = new HashMap<String, Integer>();

And I guess a .yml file would be the one I need to save to? Not too sure... The name is going to be something like "creditlog".

Thanks!

 

I think it is like this, although I am not positive:

Code:java

this.getConfig().set("the.config.path", credits);

Found on: http://wiki.bukkit.org/Configuration_API_Reference

 

chasechocolate
HashMaps are not ConfigurationSerializable

Found this with a simple search:

 

Its actualy much easier when you just save 1 hashmap:

Code:java

 
public void saveCredits() {
    for(String credit : credits.keySet()) {
        int value = credits.get(credit);
        getConfig().set("credits."+credit, value);
    }
    saveConfig();
}
 
public void loadCredits() {
    credits = new HashMap<String, Integer>(); //reset the credits
    if(getConfig().getConfigurationSection("credits") != null ) {
        //the credits have been saved before, lets load them
        Set<String> set = getConfig().getConfigurationSection("credits").getKeys(false);
        for(String credit : set) {
            int value = getConfig().getInt(credit);
            credits.put(credit, value);
        }
    }
}
 

 

lenis0012
Alright, now how would I do this with an array? For example, saving a bunch of locations to a file then re-loading them to the array?

 

String arrays can be saved using this:

Code:java

List<String> list = new ArrayList<String>();
list.add("example");
getConfig().set("test-list", list);
saveConfig();

result:

Code:

test-list:
- example

to load it:

Code:java

List<String> loaded = getConfig().getStringList("test-list");

Saving locations is a little more complicated.
Do you need to save locations or did you just say that as example?

 

lenis0012
I do actually need to save locations, if that isn't too much trouble :3

 

Ill write something for you when im back from school

 

If you are looping through a map and are going to use both the value and key, I'd recommend using the entryset.

Code:

Map<Key, Value> map = new Map<Key, Value>();
 
for(Entry<Key, Value> entry : map.entrySet()) {
    getConfig().set("credits." + entry.getKey(), entry.getValue());
}