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this is my code and my problem is: java.sql.SQLException: No value specified for parameter 1

public boolean findCongDan(String socancuoc) throws SQLException {
CongDan congdan = new CongDan();
openDatabase();
String sqlFind = "Find From CongDan Where SoCanCuoc = ?";
PreparedStatement stmt = jdbcConnection.prepareStatement(sqlFind);
ResultSet rs = stmt.executeQuery();
while(rs.next()) {
stmt.setString(1, socancuoc);
stmt.setString(2, congdan.getHoTen());
stmt.setString(3, congdan.getDiaChi());
stmt.setString(4, congdan.getGioiTinh());
stmt.setString(5, congdan.getNgaySinh());
stmt.setString(6, congdan.getDanToc());
stmt.setString(7, congdan.getTonGiao());
stmt.close();
}
closeDatabase();
int rowFind = stmt.executeUpdate();
return rowFind>0;
}

You didn't provide parameters for your query before executing it. You have to call setString on your prepared statement before calling executeQuery

Every ? in the query string needs to be provided in the stmt.executeQuery():
ResultSet rs = stmt.executeQuery("search value");
effectively making the query like this:
Find From CongDan Where SoCanCuoc = 'search value';

Invalid column index error oracle db java

I have simple program that works with mysql db. I need to switch to oracle db.
I am trying to insert data into database but I'm getting this error. I tried manually to insert data everyting is fine but programatically I got error.
This is my code.
public void saveHasta(List<Hasta> hastaList) {
try {
// PreparedStatement stmt = connection.prepareStatement("INSERT INTO tblHasta (hasta_tc_kimlik,hasta_isim, hasta_soyisim,hasta_dogum_tarih,hasta_meslek,randevu_ID) VALUES (12345678912, 'Mert', 'Akel', '1995-07-21', 'Yazilim', 2)");
//
// System.out.println("Oldu");
PreparedStatement stmt = connection.prepareStatement("INSERT INTO tblHasta (hasta_tc_kimlik,hasta_isim, hasta_soyisim,hasta_dogum_tarih,hasta_meslek,randevu_ID) VALUES (?,'?','?','?','?',?)");
Iterator<Hasta> it = hastaList.iterator();
while (it.hasNext()) {
Hasta h = it.next();
stmt.setLong(1, h.getTcKimlik());
stmt.setString(2, h.getIsim());
stmt.setString(3, h.getSoyIsim());
stmt.setString(4, h.getDogumTarih());
stmt.setString(5, h.getMeslek());
PreparedStatement pst = connection.prepareStatement(
"SELECT randevu_ID FROM tblRandevu where tc_kimlik = '" + h.getTcKimlik() + "'");
ResultSet rs = pst.executeQuery();
while (rs.next()) {
randevu_id = rs.getInt("randevu_ID");
}
stmt.setInt(6, randevu_id);
stmt.addBatch();
}
stmt.executeUpdate();
System.out.println("Oldu");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
This is my table
CREATE TABLE tblhasta
( hasta_ID INTEGER GENERATED ALWAYS AS IDENTITY (START WITH 1 INCREMENT BY 1) NOT NULL,
hasta_tc_kimlik INTEGER,
hasta_isim varchar2(50),
hasta_soyisim varchar2(50),
hasta_dogum_tarih varchar2(50),
hasta_meslek varchar2(50),
randevu_ID INTEGER,
CONSTRAINT hasta_pk PRIMARY KEY (hasta_ID)
);

You have used the prepared statements in a wrong way
PreparedStatement stmt = connection.prepareStatement("INSERT INTO tblHasta (hasta_tc_kimlik,hasta_isim, hasta_soyisim,hasta_dogum_tarih,hasta_meslek,randevu_ID)
VALUES (?,'?','?','?','?',?)");
Change values to
PreparedStatement stmt = connection.prepareStatement("INSERT INTO tblHasta (hasta_tc_kimlik,hasta_isim, hasta_soyisim,hasta_dogum_tarih,hasta_meslek,randevu_ID)
VALUES (?,?,?,?,?,?)");

java.sql.sqlexception invalid column index

Hello everyone can someone tell me what is wrong here ?
I have a task i was asked and i am new in connecting oracle databases with java servlet.
here is me code:
try {
out.print("first");
Class.forName("oracle.jdbc.OracleDriver");
out.print("aaa");
Connection con
= DriverManager.getConnection(
"jdbc:oracle:thin:#localhost:1521:xe", "myusername", "mypassword");
out.print("111");
PreparedStatement ps = con
.prepareStatement(
"INSERT INTO signup
values(fn, ln, date, em, pa, crnum)
");
out.print("222");
ps.setString(1, fn);
ps.setString(2, ln);
ps.setString(3, da);
ps.setString(4, em);
ps.setString(5, pa);
ps.setString(6, cr);
int i = ps.executeUpdate();
if (i > 0) {
out.print("You are successfully registered...");
}
} catch (Exception e2) {
out.println(e2);
}
out.close();
response.sendRedirect("address");
/* when press next bottom
it'll take me to add.html*/
and after i ran the whole code i get this :java.sql.sqlexception: invalid column index

In your SQL statement, you have to provide the tokens or placeholders for your bind variable like in the following...
PreparedStatement ps = con.prepareStatement("INSERT INTO signup values(?,?,?,?,?,?)");
ps.setString(1,fn);
ps.setString(2,ln);
ps.setString(3,da);
ps.setString(4,em);
ps.setString(5,pa);
ps.setString(6,cr);

You need to use placeholder ?:
PreparedStatement ps = con.prepareStatement("INSERT INTO signup values (?,?,?,?,?,?)");

insert into database having large number of parameter

i have to insert data into database .Because sql statement VALUES(......) have 8 parameters . Is it proficient way to use insert statement ?
Class UserRegistration {
public void insertToDatabase(){
String sql=" INSERT INTO db1(......) Values(id,fname,lastname,username,password,usertype,email,contact,address )"
}
}

The correct way to do it in Java, assuming you're using JDBC, is to use a PreparedStatement.
String sql = "INSERT INTO db1" +
" (id,fname,lastname,username,password,usertype,email,contact,address)" +
" VALUES (?,?,?,?,?,?,?,?,?)";
try (PreparedStatement stmt = conn.prepareStatement(sql)) {
stmt.setInt (1, id);
stmt.setString(2, fname);
stmt.setString(3, lastname);
stmt.setString(4, username);
stmt.setString(5, password);
stmt.setString(6, usertype);
stmt.setString(7, email);
stmt.setString(8, contact);
stmt.setString(9, address);
stmt.executeUpdate();
}

column not allowed here oracle with getText

I tried to save / edit / delete a new row in the database. writing in the gui values to be saved with getText ()
here is the code
Connection conn = Connessione.ConnecrDb();
Statement stmt = null;
ResultSet emps = null;
try{
String sql;
sql = "INSERT INTO PROGETTO.LIBRO (ISBN, DISPONIBILITA, TITOLO, CASA_EDITRICE, CODICE_AUTORE, GENERE, PREZZO)"
+ "VALUES (txt_isbn, txt_disp, txt_titolo, txt_casa, txt_autore, txt_genere, txt_prezzo)";
stmt = conn.createStatement();
emps = stmt.executeQuery(sql);
String ISBN= txt_isbn.getText();
String DISPONIBILITA= txt_disp.getText();
String TITOLO= txt_titolo.getText();
String CASA_EDITRICE= txt_casa.getText();
String CODICE_AUTORE= txt_autore.getText();
String GENERE= txt_genere.getText();
String PREZZO = txt_prezzo.getText();
JOptionPane.showMessageDialog(null, "SALVATO");
}catch(SQLException | HeadlessException e)
{
JOptionPane.showMessageDialog(null, e);
}
finally
{
try{
if (emps != null)
emps.close();
}
catch (SQLException e) { }
try
{
if (stmt != null)
stmt.close();
}
catch (SQLException e) { }
}
Getting this error: column not allowed here
Above code just takes care of insert operation. How can I delete and modify table record?

You have asked 2 different questions here
1. Column not allowed here
This happened because you have not passed values for any of parameter into insert statement.
I am not sure about your requirement however I will use PreparedStatement for this scenario.
Example
String insertTableSQL = "INSERT INTO DBUSER"
+ "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES"
+ "(?,?,?,?)";
PreparedStatement preparedStatement = dbConnection.prepareStatement(insertTableSQL);
preparedStatement.setInt(1, 11);
preparedStatement.setString(2, "MindPeace");
preparedStatement.setString(3, "system");
preparedStatement.setTimestamp(4, getCurrentTimeStamp());
preparedStatement .executeUpdate();
2. This code is only to save the data, delete, and modify an entire row how can I do?
Answer is very simple. You have to write code for the same :)
You need 3 SQL statement which has DELETE and UPDATE operation just like insert in above example.

String sql = "INSERT INTO PROGETTO.LIBRO (ISBN, DISPONIBILITA, TITOLO, "
+ "CASA_EDITRICE, CODICE_AUTORE, GENERE, PREZZO)"
+ "VALUES (?, ?, ?, ?, ?, ?, ?)";
try (PreparedStatement stmt = conn.createStatement()) {
NumberFormat numberFormat = NumberFormat.getInstance(Locale.ITALY);
String ISBN = txt_isbn.getText();
String DISPONIBILITA = txt_disp.getText();
String TITOLO = txt_titolo.getText();
String CASA_EDITRICE = txt_casa.getText();
String CODICE_AUTORE = txt_autore.getText();
String GENERE = txt_genere.getText();
BigDecimal PREZZO = new BigDecimal(
numberFormat.parse(txt_prezzo.getText()).doubleValue())
.setScale(2);
stmt.setString(1, ISBN);
stmt.setString(2, DISPONIBILITA);
stmt.setString(3, TITOLO);
stmt.setString(4, CASA_EDITRICE);
stmt.setString(5, CODICE_AUTORE);
stmt.setString(6, GENERE);
stmt.setBigDecimal(7, PREZZO);
int updateCount = stmt.executeUpdate();
JOptionPane.showMessageDialog(null, "SALVATO");
} catch(SQLException | HeadlessException e) {
JOptionPane.showMessageDialog(null, e);
}
Try-with-resources closes the stmt automatically.
The prepared statement replaces the value in the SQL with something like:
INSERT INTO table(column1, colum2, ....)
VALUES('De\'l Rey',
1234.50,
...)
for:
"De'l Rey"
1.234,50
updateCount should be 1 on success.

Wooow..true!!
I created three buttons to delete / update / insert and now it all works and automatically updates the tables.
you've been very very great. Thank you very much.
one last thing.
if I wanted to insert an error message when I delete / update etc "book not found" I tried to create an if:
Boolean found = false;
try{
sql= delete......
etc
if (!found)
JOptionPane.showMessageDialog(null, "NOT FOUND","ERRORE",JOptionPane.WARNING_MESSAGE);
etc...
Connection conn = Connessione.ConnecrDb();
Statement stmt = null;
ResultSet emps = null;
try{
String sql= "DELETE FROM progetto.libro WHERE isbn =?"; /
pst=(OraclePreparedStatement) conn.prepareStatement(sql);
pst.setString (1, txt_isbn.getText());
pst.execute();
JOptionPane.showMessageDialog(null, "ELIMINATO");
Update_table();
txt_isbn.setText("");
txt_disp.setText("");
txt_titolo.setText("");
txt_casa.setText("");
txt_autore.setText("");
txt_genere.setText("");
txt_prezzo.setText("");
}
catch (Exception e)
{
JOptionPane.showMessageDialog(null,e);
}
if you find the book must exit the book removed, or "not found". but as I deployed I always come out "deleted". why?
thanks again