ζetaCore

public class MyDataHandler extends DataStorer {

  private boolean someOption ;
  private String nameOfSomething ;
 
  public MyDataHandler (ZetaPlugin plugin ) {
    super (plugin, "file_name" ) ;
  }
 
  @Override
  public void write ( ) {
    this. config. set ( "someOption", someOption ) ;
    this. config. set ( "name", nameOfSomething ) ;
 
    this. save ( ) ; // Important, actually writes to file.
  }
 
  @Override
  public void read ( ) {
    this. someOption = this. config. getBoolean ( "someOption" ) ;
    this. nameOfSomething = this. config. getString ( "name" ) ;
  }
 
  @Override
  public void setDefualts ( ) {
    if ( ! this. config. contains ( "someOption" ) {
      this. config. set ( "someOption", someOption ) ;
    }
    if ( ! this. config. contains ( "name" ) {
      this. config. set ( "name", nameOfSomething ) ;
    }
 
    // After defaults are set the read method is called.
  }
}

public class MyDataHandler extends AbstractUntypedSQLDataStorer <Integer > /* The generic specifies the type of the primary key */ {
  // UntypedSQLDataStorer indicates there is no associated object.
 
  public MyDataHandler (ZetaPlugin plugin ) {
    super (plugin, "file_name", "table_name" ) ;
  }
 
  // You have a few new methods to implement.
  @Override
      public List <SQLColumn <?>> getColumns (SQLHandler handler ) {
    // In most cases you will likely not have to use the SQLHandler
    List <SQLColumn <?>> columns = new ArrayList <> ( ) ;
    columns. add ( new SQLInteger ( "ID", table, /* Reference to this table */ 1, ColumnSettings. PRIMARY_KEY /* Specifies this column as the primary key. Other options available using ColumnSettings.Builder */ ) ;
    columns. add ( new SQLVarChar ( "NAME", table, 16 ) ;
    columns. add ( new SQLBool ( "SOME_BOOLEAN", table ) ;
    return columns ;
  }
 
  @Override
  public void readDB ( ) {
    RowList rows = this. table. getRows ( ) ;
 
    this. someOption = rows. getFirstValue ( "ID", 0, "SOME_BOOLEAN" ). getBoolean ( ) ; // Gets the first row and then gets the boolean under the key of `SOME_BOOLEAN`
    this. nameOfSomething = rows. getFirstValue ( "ID", 0, "NAME" ). getString ( ) ; // Gets the first row and then gets the string under the key of `NAME`
  }
 
  @Override
  public void writeDB ( ) {
    this. table. writeValue ( 0, /* Id */ nameOfSomething, this. someOption ) ;
    /*
    * Using this method you must input your objects in the order that you specified in your getColumns method
    * Also when writing to the database (outside of this method) you will need to either call table.commit() or writeToDB()
    * Because for performance I use batches of SQL statements rather than sending them individually
    */
  }
 
  @Override
  public String getPrimaryKey ( ) {
    return "ID" ;
  }
}

public class MyPlugin extends ZetaPlugin { // Already extends JavaPlugin, so all is well
  private MyDataHandler dataHandler ;
  private boolean dataRead ;
 
  @Override
  public void onEnable ( ) {
    // Register any events that DON'T require your data.
    super. onEnable ( ) ;
  }
 
 
  @Override
  public String getPluginName ( ) {
      return "MyPlugin" ;
  }
 
  @Override
  protected void registerDataStorers ( ) {
    dataHandler = new MyDataHandler ( this ) ;
    dataHandler. setup ( ) ;
  }
 
  // Data is read asynchronously so this method is run after data has been read
  @Override
  public void onDataReadFinish ( ) {
    this. dataRead = true ;
    // Register any events that require your data
  }
 
  @Override
  public boolean initializedFinished ( ) {
    return dataRead ;
  }
 
  @Override
  public ItemStack getIcon ( ) {
    return new ItemStack (Material. COMMAND_BLOCK ) ;
  }
}

public class SimpleMenu extends AbstractGUIMenu {

    public SimpleMenu (PlayerUtil menuUtil ) {
        super (menuUtil, "&6Test Menu", 54 ) ; // Supports formatting codes
    }

    @Override
    public void setItems ( ) {
        // Set items here
        this. inv. setItem ( 0, makeItem (Material. DIAMOND, "&bDiamond" ) ) ;
        this. inv. setItem ( 1, makeItem (Material. GOLD_INGOT, "&6Gold" ) ) ;
        this. inv. setItem ( 2, makeItem (Material. IRON_INGOT, "&fIron" ) ) ;
        this. inv. setItem ( 3, makeItem (Material. COAL, "&8Coal" ) ) ;
        this. inv. setItem ( 4, makeItem (Material. REDSTONE, "&cRedstone" ) ) ;
        this. inv. setItem ( 5, makeItem (Material. BARRIER, "&cBarrier", "&7Click me to get a barrier" ) ) ; // Supports lore and formatting codes
    }

    @Override
    public void handleClick (InventoryClickEvent e ) {
        // Handle clicks here
        // If the player clicks on an item, this method will be called
        switch (e. getSlot ( ) ) {
            case 0 :
                this. owner. getInventory ( ). addItem (makeItem (Material. DIAMOND, "&bDiamond" ) ) ;
                break ;
            case 1 :
                this. owner. getInventory ( ). addItem (makeItem (Material. GOLD_INGOT, "&6Gold" ) ) ;
                break ;
            case 2 :
                this. owner. getInventory ( ). addItem (makeItem (Material. IRON_INGOT, "&fIron" ) ) ;
                break ;
            case 3 :
                this. owner. getInventory ( ). addItem (makeItem (Material. COAL, "&8Coal" ) ) ;
                break ;
            case 4 :
                this. owner. getInventory ( ). addItem (makeItem (Material. REDSTONE, "&cRedstone" ) ) ;
                break ;
            case 5 :
                this. owner. getInventory ( ). addItem (makeItem (Material. BARRIER, "&cBarrier" ) ) ;
                break ;
        }
    }

    @Override
    public void handleClickAnywhere (InventoryClickEvent e ) {
        // However, if you want to handle clicks anywhere in the inventory, use this method
        super. handleClickAnywhere (e ) ;
        if (e. getSlot ( ) == 12 ) {
            this. owner. getInventory ( ). addItem (makeItem (Material. DIAMOND, "&4Secret Diamond" ) ) ;
        }
    }
}