Welcome to JavaDB. JavaDB is a ReplDB API for the Java programming language! This helps you create databases for your Java repls!
To set up JavaDB in your repl, just copy all of the files in the JavaDB folder. Also, you should preferably copy
README.md to give proper credit, but feel free to rename it. Repl.it will automatically compile the package, so don't worry about compiling it yourself!
To use JavaDB, you first need to use the following import command:
You also need the following for error catching:
import java.io.IOException; import java.net.MalformedURLException;
You also need to include in any methods you use JavaDB in
throws IOException, MalformedURLException unless you use try...catch.
Then, you need to go to your
main method and create your ReplitDBHandler object.
ReplitDBHandler db = new ReplitDBHandler();
You could also specify a URL as a parameter for the constructor.
Now, you can use
db to modify your database.
Getting a list of keys
To get a list of keys, you first need to import
java.util.ArrayList. Then, you create an
ArrayList of strings that is set to
db.getKeys(). Then, you can use
ArrayList methods to use this data. You could also just directly print the value as is done in this demo repl.
Getting a key's value
To get a key's value, you simply use
db.getKey("yourkey"). The key must be present in the database or an error will be thrown. The key name, however, can include any unicode characters.
Setting a key's value
To set a key's value, you simply use
db.setKey("yourkey", "yourvalue"). If the key does not exist, this will create it. The key name and value can contain any unicode characters you wish.
Deleting a key
To delete a key, you simply use
db.deleteKey("yourkey"). Like with getting a key's value, the key must already be in the database.