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JdbcSQLSyntaxErrorException: Table "SPORTEVENT" not found; SQL statement, but why?

Im using h2 database for my application, and my task is to create and read queries as practice. The connection works fine, but the table is not found no matter what I try to do. My classes look like the following:
DB connection:
package database;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;
public class DatabaseConnectionManager {
private final String url;
private final Properties properties;
public DatabaseConnectionManager(String host, String databaseName, String username,String password){
this.url = "jdbc:h2:mem://"+host+"/"+databaseName;
this.properties = new Properties();
this.properties.setProperty("username",username);
this.properties.setProperty("password",password);
}
public Connection getConnection() throws SQLException{
return DriverManager.getConnection(this.url,this.properties);
}
}
JDBCExecutor:
package database;
import dataaccess.SporteventDAO;
import domain.FootballSportEvent;
import java.sql.*;
import java.time.LocalDateTime;
public class JDBCExecutor {
public static void main(String[] args) {
DatabaseConnectionManager databaseConnectionManager= new DatabaseConnectionManager("localhost","jdbc:h2:mem:sports_betting","sa","");
try{
Connection connection = databaseConnectionManager.getConnection();
SporteventDAO sporteventDAO = new SporteventDAO(connection);
FootballSportEvent footballSportEvent = new FootballSportEvent();
footballSportEvent.setType("FootballSportEvent");
footballSportEvent.setId(2);
Date start = new Date(2022-07-06);
Date end = new Date(2022-07-07);
footballSportEvent.setStart(start);
footballSportEvent.setEnd(end);
footballSportEvent.setResultId(2);
sporteventDAO.create(footballSportEvent);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
}
SporteventDAO:
package dataaccess;
import domain.FootballSportEvent;
import java.sql.Connection;
import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.List;
public class SporteventDAO extends DataAccessObject<FootballSportEvent> {
private static final String INSERT = "INSERT INTO SPORTEVENT (DTYPE, ID, START, END, TITLE, RESULT_ID) VALUES (?,?,?,?,?,?)";
public SporteventDAO(Connection connection){
super(connection);
}
#Override
public FootballSportEvent findById(long id) {
return null;
}
#Override
public List<FootballSportEvent> findAll() {
return null;
}
#Override
public FootballSportEvent update(FootballSportEvent dto) {
return null;
}
#Override
public FootballSportEvent create(FootballSportEvent dto) throws SQLException {
try(PreparedStatement statement = this.connection.prepareStatement(INSERT);){
statement.setString(1,dto.getType());
statement.setInt(2,dto.getId());
statement.setDate(3, (Date) dto.getStart());
statement.setDate(4, (Date) dto.getEnd());
statement.setInt(5, dto.getResultId());
statement.execute();
}catch (SQLException e){
e.printStackTrace();
throw new RuntimeException(e);
}
return null;
}
#Override
public void delete(long id) {
}
}
DataTransferObject:
package dataaccess;
public interface DataTransferObject {
int getId();
}
DataAccessObject:
package dataaccess;
import org.h2.jdbc.JdbcConnectionBackwardsCompat;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.List;
public abstract class DataAccessObject <T extends DataTransferObject>{
protected final Connection connection;
protected final static String LAST_VAL = "SELECT last_value FROM";
protected final static String CUSTOMER_SEQUENCE = "hp_customer_seq";
public DataAccessObject(Connection connection){
super();
this.connection =connection;
}
public abstract T findById(long id);
public abstract List<T> findAll();
public abstract T update(T dto);
public abstract T create(T dto) throws SQLException;
public abstract void delete(long id);
protected int getLastVal(String sequence){
int key = 0;
String sql = LAST_VAL + sequence;
try(Statement statement = connection.createStatement()) {
ResultSet rs = statement.executeQuery(sql);
while (rs.next()) {
key = rs.getInt(1);
}
return key;
}catch (SQLException e){
e.printStackTrace();
throw new RuntimeException(e);
}
}
}
FootballSportEventClass:
package domain;
import dataaccess.DataTransferObject;
import java.util.Date;
public class FootballSportEvent implements DataTransferObject
{
private String type;
private String name;
private int id;
private Date end;
private Date start;
private String title;
private int resultId;
public FootballSportEvent(){
}
public FootballSportEvent(String type, String name, int id, Date end, Date start, String title, int resultId) {
this.type = type;
this.name = name;
this.id = id;
this.end = end;
this.start = start;
this.title = title;
this.resultId = resultId;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Date getEnd() {
return end;
}
public void setEnd(Date end) {
this.end = end;
}
public Date getStart() {
return start;
}
public void setStart(Date start) {
this.start = start;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public int getResultId() {
return resultId;
}
public void setResultId(int resultId) {
this.resultId = resultId;
}
#Override
public String toString() {
return "FootballSportEvent{" +
"type='" + type + '\'' +
", name='" + name + '\'' +
", id=" + id +
", end=" + end +
", start=" + start +
", title='" + title + '\'' +
", resultId=" + resultId +
'}';
}
}
And the following exception it thrown:
org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "SPORTEVENT" not found; SQL statement:
INSERT INTO SPORTEVENT (DTYPE, ID, START, END, TITLE, RESULT_ID) VALUES (?,?,?,?,?,?)
Edit:
I also tried using:
this.url = "jdbc:h2:mem://"+host+"/"+databaseName+";DB_CLOSE_DELAY=-1";
but it doesn't work.

IndexOutOfBoundsException when trying to print data called from MySQL database

I'm getting a "java.lang.IndexOutOfBoundsException: Index: 0, Size: 0" and I don't even know what is wrong.
I have 4 classes. I get data from two MySQL databases in the first (ConnectionClass) and the second one is a main class from which I run and print the result but for some reason it doesn't work. The third and fourth are normal classes.
The first database is called account which has a few columns and a foreign key(f_id) from the second database f.
My Connection class:
package tryout;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
public class ConnectionClass {
Connection connection;
public void connect() {
String url = "jdbc:mysql://localhost:3306/mydemo";
String username = "root";
String password = "12345";
try {
connection = DriverManager.getConnection(url, username, password);
} catch (SQLException e) {
e.printStackTrace();
}
}
public ArrayList<F> getAllFs() {
connect();
ArrayList<F> l = new ArrayList<F>();
String sql="SELECT * FROM f";
try {
Statement s = connection.createStatement();
ResultSet rSet = s.executeQuery(sql);
while(rSet.next()) {
int j=0;
l.get(j).setF_id(rSet.getInt("f_id"));
l.get(j).setF_name(rSet.getString("f_name"));
j++;
}
connection.close();
} catch (SQLException e) {
e.printStackTrace();
}
return l;
}
public ArrayList<Account> getAllAccounts() {
connect();
ArrayList<Account> liste = new ArrayList<Account>();
String sql="SELECT * FROM account";
try {
Statement statement = connection.createStatement();
ResultSet rs = statement.executeQuery(sql);
while(rs.next()) {
int i=0;
liste.get(i).setUsername(rs.getString("username"));
liste.get(i).setPassword(rs.getString("password"));
liste.get(i).setFullname(rs.getString("fullname"));
liste.get(i).setEmail(rs.getString("email"));
liste.get(i).setWebsite(rs.getString("website"));
liste.get(i).setAge(rs.getInt("age"));
liste.get(i).setF((F) rs.getObject("f_id"));
i++;
}
connection.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return liste;
}
}
My main class:
package tryout;
import java.util.ArrayList;
public class MAIN {
public static void main(String[] args) {
ConnectionClass class1 = new ConnectionClass();
ArrayList<Account> list = new ArrayList<Account>();
list = class1.getAllAccounts();
for(int i=0; i<list.size(); i++) {
System.out.println(list.get(i).getUsername()+" "+list.get(i).getPassword());
}
}
}
Account.java:
package tryout;
public class Account {
private String username;
private String password;
private String fullname;
private String email;
private String website;
private int age;
private F f;
public Account() {
super();
}
public Account(String username, String password, String fullname, String email, String website, int age, F f) {
super();
this.username = username;
this.password = password;
this.fullname = fullname;
this.email = email;
this.website = website;
this.age = age;
this.f = f;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getFullname() {
return fullname;
}
public void setFullname(String fullname) {
this.fullname = fullname;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getWebsite() {
return website;
}
public void setWebsite(String website) {
this.website = website;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public F getF() {
return f;
}
public void setF(F f) {
this.f = f;
}
}
F.java:
package tryout;
public class F {
private int f_id;
private String f_name;
public F() {
super();
}
public F(int f_id, String f_name) {
super();
this.f_id = f_id;
this.f_name = f_name;
}
public int getF_id() {
return f_id;
}
public void setF_id(int f_id) {
this.f_id = f_id;
}
public String getF_name() {
return f_name;
}
public void setF_name(String f_name) {
this.f_name = f_name;
}
}
Here are my databases:
I tried changing getAllAccounts to this:
public ArrayList<Account> getAllAccounts() {
connect();
ArrayList<Account> liste = new ArrayList<Account>();
ArrayList<F> l2 = new ArrayList<F>();
//l2 = getAllFs();
String sql="SELECT * FROM account";
try {
Statement statement = connection.createStatement();
ResultSet rs = statement.executeQuery(sql);
while(rs.next()) {
Account acc = new Account();
acc.setAge(rs.getInt("age"));
acc.setEmail(rs.getString("email"));
acc.setUsername(rs.getString("username"));
acc.setPassword(rs.getString("password"));
acc.setFullname(rs.getString("fullname"));
}
connection.close();
} catch (SQLException e) {
e.printStackTrace();
}
return liste;
}
and when i run it in the main class nothing shows. The error is gone but nothing is printed in the console.

The problem is with the following lines:
ArrayList<F> l = new ArrayList<F>();
String sql="SELECT * FROM f";
try {
Statement s = connection.createStatement();
ResultSet rSet = s.executeQuery(sql);
while(rSet.next()) {
int j=0;
l.get(j).setF_id(rSet.getInt("f_id"));
l.get(j).setF_name(rSet.getString("f_name"));
j++;
}
The list has no element but you are using l.get(j).
In order to understand this problem better, run the following code and you will get Exception in thread "main" java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0.
import java.util.ArrayList;
public class Main {
public static void main(String[] args) {
ArrayList<String> l = new ArrayList<String>();
System.out.println(l.get(0));
}
}
Keeping aside the problem, you are initializing j inside while loop which means the incremented value is lost with every iteration. In order to solve the problem, replace
while(rSet.next()) {
int j=0;
l.get(j).setF_id(rSet.getInt("f_id"));
l.get(j).setF_name(rSet.getString("f_name"));
j++;
}
with
while(rSet.next()) {
l.add(rSet.getInt("f_id"));
l.add(rSet.getString("f_name"));
}

How to get properties of an object stored in ArrayList using Java

I want to print all student objects' properties(name, subject, registrationNo) stored in a ArrayList object.
student details are getting from a database and insert them into student objects.
Then these student objects are insert into the ArrayList.
Finally I want to print these student object properties one by one as follows.
Followings are my codes.
DBconn.java
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class DBconn {
static Connection conn;
public static Connection getConnection() {
try {
Class.forName("com.mysql.jdbc.Driver");
try {
conn = DriverManager.getConnection("jdbc:mysql://localhost/student_database", "root", "");
} catch (SQLException ex) {
}
} catch (ClassNotFoundException ex) {
}
return conn;
}
}
Student.java
public class Student {
private String name;
private String RegistrationNo;
private String course;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getRegistrationNo() {
return RegistrationNo;
}
public void setRegistrationNo(String RegistrationNo) {
this.RegistrationNo = RegistrationNo;
}
public String getCourse() {
return course;
}
public void setCourse(String course) {
this.course = course;
}
}
StudentList.java
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
public class StudentList {
public static ArrayList getStudentList() {
ArrayList list = new ArrayList();
String sql = "SELECT * FROM student";
try {
Statement stm = DBconn.getConnection().createStatement();
ResultSet rs = stm.executeQuery(sql);
while (rs.next()) {
Student student = new Student();
student.setName(rs.getString(1));
student.setCourse(rs.getString(2));
student.setRegistrationNo(rs.getString(3));
list.add(student);
}
} catch (SQLException ex) {
}
return list;
}
}
ViewStudent.java
public class ViewStudent {
public static void main(String[] args) {
int size = StudentList.getStudentList().size();
for (int i = 0; i < size; i++) {
System.out.println(StudentList.getStudentList().get(i));
//I want to get all student's name,subject and registrationNo
}
}
}
Thanks.

Simply give Student a public String toString() method override, one that returns a String holding all key properties, and then this will work fine:
System.out.println(StudentList.getStudentList().get(i));

Instead of System.out.println(StudentList.getStudentList().get(i));, you should access the student's properties and print it out.
Student s = (Student) StudentList.getStudentList().get(i);
System.out.println(s.getName());
System.out.println(s.getCourse());
System.out.println(s.getRegistrationNo());

Cant get XML parsed data into an SQL database table

I have simple XML file (see below)
</Students>`<?xml version="1.0" encoding="utf-8"?>
<Students>
<Student id="1">
<id>001</id>
<firstName>John</firstName>
<lastName>Smith</lastName>
</Student>
<Student id="2">
<id>002</id>
<firstName>Jamie</firstName>
<lastName>Lavery</lastName>
</Student>
<Student id="3">
<id>003</id>
<firstName>Emma</firstName>
<lastName>Lavery</lastName>
</Student>
</Students>
`>
I am trying to parse it into an Arraylist of type student then inserting this into a SQL database table...below is the code for the parser and DB connection
Student.java
package uk.ac.qub.XML_Parser;
public class Student {
private int id;
private String firstName;
private String lastName;
public Student(){
}
public Student(int id, String firstName, String lastName) {
this.id = id;
this.firstName = firstName;
this.lastName = lastName;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String toString() {
return "ID : " + this.id + "\nFirst Name : "
+ this.firstName + "\nLast Name : " + this.lastName;
}
}
XML_Handler.java
package uk.ac.qub.XML_Parser;
import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class XML_Handler extends DefaultHandler {
//List to hold Employees object
private List<Student> studentList = null;
private Student student = null;
//getter method for employee list
public List<Student> getStudentList() {
return studentList;
}
boolean bId = false;
boolean bFirstName = false;
boolean bLastName = false;
#Override
public void startElement(String uri, String localName, String qName, Attributes attributes)
throws SAXException {
if (qName.equalsIgnoreCase("Student")) {
String id = attributes.getValue("id");
//initialize S object and set id attribute
student = new Student();
student.setId(Integer.parseInt(id));
if (studentList == null)
studentList = new ArrayList<>();
} else if (qName.equalsIgnoreCase("id")) {
//set boolean values for fields, will be used in setting variables
bId = true;
} else if (qName.equalsIgnoreCase("firstName")) {
bFirstName = true;
} else if (qName.equalsIgnoreCase("lastName")) {
bLastName = true;
}
}
#Override
public void endElement(String uri, String localName, String qName) throws SAXException {
if (qName.equalsIgnoreCase("Student")) {
//add Employee object to list
studentList.add(student);
}
}
#Override
public void characters(char ch[], int start, int length) throws SAXException {
if (bId) {
//age element, set age
student.setId(Integer.parseInt(new String(ch, start, length)));
bId = false;
} else if (bFirstName) {
student.setFirstName(new String(ch, start, length));
bFirstName = false;
} else if (bLastName) {
student.setLastName(new String(ch, start, length));
bLastName = false;
}
}
}
XML_SAX_Parser.java
package uk.ac.qub.XML_Parser;
import java.io.File;
import java.io.IOException;
import java.util.List;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;
public class XML_SAX_Parser {
public void SAX_Parser() {
SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
try {
SAXParser saxParser = saxParserFactory.newSAXParser();
XML_Handler handler = new XML_Handler();
saxParser.parse(new File(
"c:/users/jamie/desktop/DISSERTATION/student.xml"),
handler);
// Get Student list
List<Student> studentList = handler.getStudentList();
for (Student student : studentList)
System.out.println(student);
} catch (ParserConfigurationException | SAXException | IOException e) {
e.printStackTrace();
}
}
}
DBConnection.java
package uk.ac.qub.DB_Connection;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import uk.ac.qub.XML_Parser.Student;
public class DBConnection {
// this is a local host url.
private static String url = "jdbc:mysql://localhost/test1";
private static String userName = "root";
private static String password = "";
public void startDB(){
List<Student> studentList = new ArrayList<Student>();
connectionDriver();
passinUpdate(studentList);
}
// Enables java to connect to mysql database
public void connectionDriver() {
try {
Class.forName("com.mysql.jdbc.Driver");
System.out.println("Connected to mySQL");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
public void passinUpdate(List<Student> studentList) {
try {
Connection connect2 = DriverManager.getConnection(url, userName,
password);
System.out.println("Established Conenction.....");
String insertStudent = "INSERT INTO Student"
+ "(id, firstName, lastName) VALUES" + "('student.id','student.firstName','student.lastName')";
PreparedStatement statement2 = connect2
.prepareStatement(insertStudent);
statement2.setInt(1, ((Student) studentList).getId());
statement2.setString(2, ((Student) studentList).getFirstName());
statement2.setString(3, ((Student) studentList).getLastName());
statement2.execute();
} catch (SQLException sqlException) {
if (sqlException.getErrorCode() == 1007) {
// Database already exists error
System.out.println(sqlException.getMessage());
} else {
// Some other problems, e.g. Server down, no permission, etc
sqlException.printStackTrace();
}
}
}
}
Output....
Connected to mySQL
Established Conenction.....
Exception in thread "main" java.lang.ClassCastException: java.util.ArrayList cannot be cast to uk.ac.qub.XML_Parser.Student
at uk.ac.qub.DB_Connection.DBConnection.passinUpdate(DBConnection.java:61)
at uk.ac.qub.DB_Connection.DBConnection.startDB(DBConnection.java:25)
at uk.ac.qub.Start.Start_Program.main(Start_Program.java:9)
This is quite alot of code I know but really not sure where the problem is.....thanks for any help!

Java tells you the exact location of the problem:
uk.ac.qub.DB_Connection.DBConnection.passinUpdate(DBConnection.java:61)
If the argument to the method passinUpdate is
List<Student> studentList
you can not cast this as
(Student) studentList
Do a loop:
for (Student student : studentList) {
statement2.setInt(1, student.getId());
statement2.setString(2, student.getFirstName());
statement2.setString(3, student.getLastName());
statement2.execute();
}

You have a couple of issues in your method
public void passinUpdate(List<Student> studentList) {
try {
Connection connect2 = DriverManager.getConnection("", "",
"");
System.out.println("Established Conenction.....");
//Passing parameters to query
String insertStudent = "INSERT INTO Student" + "(id, firstName, lastName) VALUES" + "(?,?,?)";
//Create a loop for students
for(Student student : studentList){
PreparedStatement statement2 = connect2 .prepareStatement(insertStudent);
//Incorrect cast was used here
statement2.setInt(1, student.getId());
statement2.setString(2, student.getFirstName());
statement2.setString(3, student.getLastName());
statement2.execute();
}
} catch (SQLException sqlException) {
if (sqlException.getErrorCode() == 1007) {
// Database already exists error
System.out.println(sqlException.getMessage());
} else {
// Some other problems, e.g. Server down, no permission, etc
sqlException.printStackTrace();
}
}
}

What is the logic of creating the Mysql SELECT Statement for drop down in Struts + JSP?

can you please help me rectify the code below, I'm trying to create a populated drop down list in struts 2 in Eclipse as my IDE. This is my first time to use 'STRUTS' as well as 'IDE ECLIPSE'.
To be specific by the SELECT statement I do not know how to write the code that, when a user selects the 'Make' of the car, the database extracts the different 'Models' of that make. But other select items like 'Color', should be optional in that a user can proceed to search for the 'Make' minus choosing an option from them.
Please help I'm new in ActionClass and DataBase. Thanx in advance.
package drive;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import com.opensymphony.xwork2.ActionSupport;
public class CarSearch extends ActionSupport {
private String model;
private String modification;
private String engine;
private String color;
private String bodyType;
private String minPrice;
private String maxPrice;
private String mileage;
private int minYear;
private int maxYear;
private String make;
public String execute () {
String ret = NONE;
Connection conn = null;
try {
String URL = "jdbc:mysql://localhost/Cars";
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(URL, "root", "$jademedia247");
String sql = "SELECT make FROM type WHERE";
sql+=" model = ? AND modification = ? ";
PreparedStatement ps = conn.prepareStatement (sql);
ps.setString(1, model);
ps.setString(2, modification);
ResultSet rs = ps.executeQuery();
while (rs.next()){
make = rs.getString(1);
ret = SUCCESS;
}
} catch (Exception e) {
ret = ERROR;
} finally {
if (conn != null) {
try {
conn.close();
} catch (Exception e) {
}
}
}
return ret;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public String getModification() {
return modification;
}
public void setModification (String modification) {
this.modification = modification;
}
public String getEngine() {
return engine;
}
public void setEngine (String engine) {
this.engine = engine;
}
public String getColor() {
return color;
}
public void setColor (String color) {
this.color = color;
}
public String getBodyType() {
return bodyType;
}
public void setBodyType(String bodyType) {
this.bodyType = bodyType;
}
public String getMinPrice() {
return minPrice;
}
public void setMinPrice(String minPrice) {
this.minPrice = minPrice;
}
public String getMaxPrice () {
return maxPrice;
}
public void setMaxPrice (String maxPrice) {
this.maxPrice = maxPrice;
}
public String getMileage () {
return mileage;
}
public void setMileage (String mileage) {
this.mileage = mileage ;
}
public int getMinYear() {
return minYear;
}
public void setMinYear(int minYear) {
this.minYear = minYear;
}
public int getMaxYear() {
return maxYear;
}
public void setMaxYear(int maxYear) {
this.maxYear = maxYear;
}
public String getMake() {
return make;
}
public void setMake(String make){
this.make = make;
}
}

PreparedStatement ps = conn.prepareStatement ("SELECT field_name FROM table_name WHERE model = ? AND modification = ? ");
ps.setString(1, model);
ps.setString(2, modification);
ResultSet rs = ps.executeQuery();
//it will help you