Asking help for INSERT, DELETE, UPDATE, SELECT

Question

I have to build a program that is like a bridge from the dabase hsqldb and the final user.
So the user has the options of SERCH, EDIT, INSERT or DELETE a register/field/row whatever.
Remember that the values are entered by the user, so I don't know the field to be edited, deleted, etc...
I would thank a lot if you could put some code to do all these operations.
But please, if you won't post the codes please don't post nothing else.
I need the example codes!
Thanks if you can give me a hand.

Answer 1

I Just need to understand what's wrong with my code:
// call this when user presses insert button...
public void insertRegister() {
String title = "Inserting new register...";
String tempId = JOptionPane.showInputDialog(null, "Enter ID Client:", title, 3);
int id = Integer.parseInt(tempId);
String name = JOptionPane.showInputDialog(null, "Enter name Client:", title, 3);
String tel = JOptionPane.showInputDialog(null, "Enter tel Client:", title, 3);
try {
// Setting up the PreparedStatement
PreparedStatement preparedStatement = connection.prepareStatement("INSERT INTO CLIENTS (id_client, name_client, tel_client) VALUES(?,?,?)");
// Now we insert the real values for PreparedStatement and execute it!
preparedStatement.setInt(1, id);
preparedStatement.setString(2, name.toUpperCase());
preparedStatement.setString(3, tel);
preparedStatement.executeUpdate();
catch(SQLException s) { s.printStackTrace(); }
// call this when user presses delete button...
public void deleteRegister() {
try {
// Setting up the PreparedStatement
PreparedStatement preparedStatement = connection.prepareStatement("DELETE FROM CLIENTS WHERE id_client = ?");
String tempId = JOptionPane.showInputDialog(null, "Enter ID Client to be deleted:", "Deleting register...", 3);
int id = Integer.parseInt(tempId);
preparedStatement.setInt(1, id);
preparedStatement.executeUpdate();
catch(SQLException s) { s.printStackTrace(); }
// Of couse I don't want anyone coding for me...
// But if I'm not asking too much, just please someone tell me what's wrong with my code, and how to fix it. That's all.