----
        // Create Point objects from the coordinate array
	Point[] points = new Point[coords.length];
	for (int i = 0; i<points.length; i++) {
		points[i] = new Point(coords[i][0], coords[i][1]);
	}

	someArray[][] = { {value, value}, {value, value}, {value, value} };

----
ITTERATION

	int ar[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
	int x;

        // iterating over an array
	for (int i : ar) {

            // accessing each element of array
		x = i;
		System.out.print(x + " ");
}

https://stackoverflow.com/questions/11844012/they-say-in-java-every-thing-is-an-object-is-that-true

resultSet.close();
query.close();
connection.close();

----

package project;

import java.sql.*;

public class DatabaseConnection {

	private String dbUsername, dbPassword, dbHost, dbPort, dbName, dbUrl;

	private Connection dbConnection;

	public DatabaseConnection() throws ClassNotFoundException, SQLException {
		initComponents();
	}

	private void initComponents() throws ClassNotFoundException, SQLException {
		Class.forName("com.mysql.jdbc.Driver");

		this.dbUsername = "root";
		this.dbPassword = "root";
		this.dbHost = "localhost";
		this.dbPort = "3306";
		this.dbName = "test_my_database";

		this.dbUrl = "jdbc.mysql://" + this.dbHost + ":" + this.dbPort + "/" + this.dbName;

		this.dbConnection = DriverManager.getConnection(dbUrl, dbUsername, dbPassword);

		System.out.println("CONNECTION ESTABLISHED");
	}

//	public Connection getConnection() {
//
//	}
}

----

package project;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Project {

	public static void main(String[] args) {

		try {
			DatabaseConnection foo = new DatabaseConnection();

			Connection kook = foo.getConnection();

			Statement stat = foo.createStatement();

			ResultSet result = stat.executeQuery("select");

			while(result.next()) {
				int idusers = result.getInt("idusers");
				String name = result.getString("name");
				String email = result.getString("email");
				float value = result.getFloat("value");
				System.out.println(idusers + ": " + name + " at " + email + ". value: " + value);
			}
		}
		catch(ClassNotFoundException ex) {
			System.out.println("Driver not found");
			ex.printStackTrace(System.out);
		}
		catch(SQLException ex) {
			System.out.println("ERROR: Connection not established");
			ex.printStackTrace(System.out);
		}
	}
}

----

package project;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

public class FrameDataInsert extends JFrame {
//	behaviours
	private BorderLayout borderLayout;
	private GridLayout gridLayout;
//	frame
	private JLabel label;
	private JButton button;
//	panel
	private JPanel panel;
	private JTextArea username;
	private JTextArea password;
	private JTextArea value;

	public FrameDataInsert() {
		initComponents();

		this.setTitle("java.sql API testing");
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.pack();
		this.setVisible(true);
	}

	private void initComponents() {
//behaviours
		gridLayout = new GridLayout(3,0);
//	frame
		label = new JLabel ("Insert data in fields, then press button");
		button = new JButton("insert");
		button.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent stim) {
				insertData();
			}
		});
//	panel
		panel = new JPanel(gridLayout);
		username = new JTextArea();
		password = new JTextArea();
		value = new JTextArea();
//	add
		this.add(label, BorderLayout.PAGE_START);
		this.add(button, BorderLayout.PAGE_END);

		this.add(panel, borderLayout.CENTER);
		panel.add(username);
		panel.add(password);
		panel.add(value);
	}

	private void insertData() {

	}
}