Hello im making a java database using netbeans but an error occured java.sql.sqlnontransientconnectionexception: the connection was refused because the database was not found.

this error "
java.sql.SQLNonTransientConnectionException: The connection was refused because the database AnimeFigurineCollection [wimmy on WIMMY] was not found.
" keeps appearing even tho my database is connected, also when remove my derbyclient.jar this error disappears. idont know whats happening pls help

this is my code so far

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package case_study_3;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JOptionPane;

public class CollectionRepository {
    PreparedStatement ps;
    ResultSet rs;
    Connection conn;

    public CollectionRepository() {
    
    try {
        dbconn();
    } catch (SQLException ex) {
        java.util.logging.Logger.getLogger(CollectionRepository.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(CollectionRepository.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    try {
        conn.createStatement();
    } catch (SQLException ex) {
        java.util.logging.Logger.getLogger(CollectionRepository.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    
    }

   public void dbconn() throws SQLException, ClassNotFoundException {
    String url = "jdbc:derby://localhost:1527/AnimeFigurineCollection [wimmy on WIMMY]";
    String driver = "org.apache.derby.jdbc.ClientDriver";
    Class.forName(driver);
    conn = DriverManager.getConnection(url,"wimmy","1231");

    }//end db conn
    
    public List<Collection> getAllProduct(){
        List<Collection> col = new ArrayList<>();
        
        String queryStr = "Select * From ALBUM";
    try {
        ps = conn.prepareStatement(queryStr);
        rs = ps.executeQuery();
        while(rs.next()){
            Collection collect = new Collection(rs.getString("code"),
                    rs.getInt("registrationNumber"),
                    rs.getInt("barcode"),
                    rs.getString("maincharName"),
                    rs.getString("title"),
                    rs.getString("version"),
                    rs.getString("type"));
            col.add(collect);
        }
    } catch (SQLException ex) {
        java.util.logging.Logger.getLogger(CollectionRepository.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    
    
    }    
    return col;
    
}//end getall
    
    public void insertProduct(Collection col){
    try {
        String queryStr = "Insert into ALBUM(Code, RegistrationNumber, Barcode, MainCharName, Title, Version, Type)"
                + "Values(?,?,?,?,?,?,?)";
        
        ps = conn.prepareStatement(queryStr);
        ps.setString(1, col.getCode());
        ps.setInt(2, col.getRegistrationNumber());
        ps.setInt(3, col.getBarcode());
        ps.setString(4, col.getMaincharName());
        ps.setString(5, col.getTitle());
        ps.setString(6, col.getVersion());
        ps.setString(7, col.getSize());
        
        ps.execute();
        JOptionPane.showMessageDialog(null, "Successfully added " + col.getCode() + ", " 
                + col.getMaincharName() + ", " + col.getTitle()+ ", " + col.getVersion() + ", " + col.getSize());
    } catch (SQLException ex) {
        java.util.logging.Logger.getLogger(CollectionRepository.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    
    }
    
    public void editProduct(Collection col) throws SQLException {
              
        String queryStr = "UPDATE ALBUM"
                + " SET registrationNumber=?, barcode=?, maincharName=?, title=?, version=?, type=?"
                + " WHERE code=?";
        
        ps = conn.prepareStatement(queryStr);
        
        ps.setInt(1, col.getRegistrationNumber());
        ps.setInt(2 , col.getBarcode());
        ps.setString(3, col.getMaincharName());
        ps.setString(4, col.getTitle());
        ps.setString(5, col.getVersion());
        ps.setString(6, col.getSize());
        ps.setString(7, col.getCode());
        
        ps.execute();
        JOptionPane.showMessageDialog(null, "Successfully updated " + col.getMaincharName() + ", " + col.getTitle());
    }
    
               
    public void deleteStudent(String code) throws SQLException {
               
        String queryStr = "DELETE FROM ALBUM"
                + " WHERE code=?";
        
        ps = conn.prepareStatement(queryStr);
        ps.setString(1, code);
        ps.execute();
        JOptionPane.showMessageDialog(null, "Successfully deleted ");
       
    }//end delete
}