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Question

For those of you who just helped me thanks a lot.
Another problem, i have coded the system using java ontop of an Oracle DB. In several of my forms I have a delete button which I want to give some functionality to as it has none at the moment. The functionality I want is to be able press this delete button and for it to delete the current showing record in the DB.
For example if i was looking at a customer in the customer form and pressed the delete button I would like it to delete that customer from the DB. Look at my code so far BELOW to see if you can give me any tips on what the code should look like.
10 dukes for whoever gives me a solution that works so all you programming guru's get your thinking hats on and answer this little baby!!!
CUSTOMER CLASS
import java.util.*;
import java.sql.*;
public class Customer{
     private int customer_id;
     private String customer_name;
     private String address1;
     private String address2;
     private String town;
     private String county;
     private String post_code;
     private String country;
     private String fax;
     private String telephone;
     private String contact_name;
     private String email;
     private boolean newCustomer;
     //private JobList jobList;
     public Customer(int c){
          customer_id = c;
          newCustomer = true;
     public Customer(int inCustomer_id,String inCustomer_name,String inAddress1, String inAddress2, String inTown, String inCounty,String inPost_code,String inCountry,String inFax,String inTelephone,String inContact_name,String inEmail){
          customer_id=inCustomer_id;
          customer_name=inCustomer_name;
          address1=inAddress1;
          address2=inAddress2;
          town=inTown;
          county=inCounty;
          post_code=inPost_code;
          country=inCountry;
          fax=inFax;
          telephone=inTelephone;          
          contact_name=inContact_name;
          email=inEmail;
          newCustomer = false;
     public String getAddress1(){
          if (address1 == null)
               return ("");
          else
               return address1;
     public String getAddress2(){
          if (address2 == null)
               return ("");
          else
               return address2;
     public String getCounty(){
          if (county == null)
               return ("");
          else
               return county;
     public String getFax(){
          if (fax == null)
               return ("");
          else
               return fax;
     public int getCustomer_id(){
          if (customer_id == 0)
               return (0);
          else
               return customer_id;
     public String getCustomer_name(){
          if (customer_name == null)
               return ("");
          else
               return customer_name;
     public String getTelephone(){
          if (telephone == null)
               return ("");
          else
               return telephone;
     public String getPost_code(){
          if (post_code == null)
               return ("");
          else
               return post_code;
     public String getTown(){
          if (town == null)
               return ("");
          else
               return town;
     public String getCountry(){
          if (country == null)
               return ("");
          else
               return country;
     public String getContact_name(){
          if (contact_name == null)
               return ("");
          else
               return contact_name;
     public String getEmail(){
          if (email == null)
               return ("");
          else
               return email;
     /*public JobList getJobList() throws SQLException {
          // if the joblist object exists return it otherwise create it
          if (jobList != null){
               return jobList;
          else{
               return new JobList(this);
     public boolean isNewCustomer(){
          return newCustomer;
     public void setAddress1(String inAddress1){
          address1=inAddress1;
     public void setAddress2(String inAddress2){
          address2=inAddress2;
     public void setCounty(String inCounty){
          county=inCounty;
     public void setFax(String inFax){
          fax=inFax;
     public void setCustomer_id(int inCustomer_id){
          customer_id = inCustomer_id;
     public void setCustomer_name(String inCustomer_name){
          customer_name=inCustomer_name;
     public void setTelephone(String inTelephone){
          telephone=inTelephone;
     public void setPost_code(String inPost_code){
          post_code=inPost_code;
     public void setTown(String inTown){
          town=inTown;
     public void setCountry(String inCountry){
          country=inCountry;
     public void setContact_name(String inContact_name){
          contact_name=inContact_name;
     public void setEmail(String inEmail){
          email=inEmail;
CUSTOMERLIST CLASS
import java.sql.*;
import java.util.*;
public class CustomerList{
     private ResultSet rs ;
     private Connection con;
     private Statement stmt;
     public CustomerList () {
          ConnectionManager man = ConnectionManager.getInstance();
          con = man.getConnection();
     public Customer getFirstCustomer()throws SQLException     {
          Customer firstCustomer;
          stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
          rs = stmt.executeQuery("select customer_id,customer_name,address1,address2,town,county,post_code,country,fax,telephone,contact_name,email from customer");
          rs.next();
          firstCustomer = loadCustomer();
          return firstCustomer;
     public Customer getLastCustomer() throws SQLException{
          Customer lastCustomer;
          rs.last();
          lastCustomer = loadCustomer();
          return lastCustomer;
     public Customer getNextCustomer()throws SQLException{
          Customer nextCustomer ;
          if (rs.next()){
               nextCustomer = loadCustomer();
          else{
               nextCustomer = null;
          return nextCustomer;
     public Customer getPreviousCustomer()throws SQLException{
          Customer previousCustomer;
          if (rs.previous()){
               previousCustomer = loadCustomer();
          else
               previousCustomer = null;
          return previousCustomer;
     public Customer findCustomer(int inCustNum) throws SQLException{
          Customer foundCust;
          if (inCustNum==0){
               foundCust = getFirstCustomer();
          else{
               stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
               rs = stmt.executeQuery("select customer_id,customer_name,address1,address2,town,county,post_code,country,fax,telephone,contact_name,email from customer where customer_id = "+inCustNum);
               if (rs.next()){
                    foundCust = loadCustomer();
               else
                    foundCust = null;
          return foundCust;
     public Customer addCust()throws SQLException{
          Statement stmt2 = con.createStatement();
          ResultSet rsadd = stmt2.executeQuery("select custid.nextval from dual");
          rsadd.next();
          int id = rsadd.getInt("nextval");
          rsadd.close();
          stmt2.close();
          Customer newCust = new Customer(id);
          return newCust;
     public Customer saveCustomer(Customer inSaveCust)throws SQLException{
          Statement stmt3 = con.createStatement();
          int rowNum;
          //int incid = inSaveCust.getCid();
          if (inSaveCust.isNewCustomer()){
               stmt3.executeUpdate("insert into customer values ("
               +inSaveCust.getCustomer_id()
               +",'"+inSaveCust.getCustomer_name()
               +"','"+inSaveCust.getAddress1()
               +"','"+inSaveCust.getAddress2()
               +"','"+ inSaveCust.getTown()
               +"','"+ inSaveCust.getCounty()
               +"','"+inSaveCust.getPost_code()
               +"','"+inSaveCust.getCountry()
               +"','"+inSaveCust.getFax()
               +"','"+ inSaveCust.getTelephone()
               +"','"+inSaveCust.getContact_name()
               +"','"+inSaveCust.getEmail()+"')");
               inSaveCust = getFirstCustomer();//refreshes list after insert
               inSaveCust = getLastCustomer();// goes to the inserted record ie last one
          else {
               rowNum = rs.getRow();//traps the record number so can be returned to
               stmt3.executeUpdate("update customer set customer_name = '"+inSaveCust.getCustomer_name()
               + "', address1 = '"+inSaveCust.getAddress1()
               + "', address2 = '"+inSaveCust.getAddress2()
               + "', town = '"+ inSaveCust.getTown()
               + "', county = '"+ inSaveCust.getCounty()
               + "', post_code = '"+inSaveCust.getPost_code()
               + "', telephone = '"+inSaveCust.getCountry()
               + "', fax = '"+inSaveCust.getFax()
               + "', country = '"+inSaveCust.getTelephone()
               + "', contact_name = '"+inSaveCust.getContact_name()
               + "', email = '"+inSaveCust.getEmail()
               +"' where customer_id = "+inSaveCust.getCustomer_id());
               inSaveCust = getFirstCustomer();
               rs.absolute(rowNum); // points back to same record number as updated
               inSaveCust = loadCustomer();
          con.commit();
          return inSaveCust;
     public boolean isFirst() throws SQLException{
          return rs.isFirst();
     public boolean isLast() throws SQLException{
          return rs.isLast();
     public Customer loadCustomer ()throws SQLException{
          Customer cust = new Customer(rs.getInt("customer_id"),rs.getString("customer_name"),rs.getString("address1"),
                         rs.getString("address2"),rs.getString("town"),rs.getString("county"),
                         rs.getString("post_code"),rs.getString("country"),rs.getString("fax"),
                         rs.getString("telephone"),rs.getString("contact_name"),rs.getString("email"));
          return cust;
CUSTOMERFORM CLASS
import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import java.util.*;
public class CustomerForm extends JFrame implements ActionListener {
private Customer currentCustomer;
private CustomerList inCustomerList;
private JPanel panel;
private JTextField textCustomer_id,textCustomer_name,textAddress1,textAddress2,textTown,
     textCounty,textPost_code,textCountry,textTelephone,textFax,textContact_name,textEmail,textFind;
private JButton nextCust, prevCust,firstCust,lastCust,newCust,
     findCust,add,save,delete,jobs,close;
     public CustomerForm(CustomerList inC)throws SQLException{
          inCustomerList = inC;
          currentCustomer = inCustomerList.getFirstCustomer();
          displayForm();
          displayFields();
          setTextFields();
          displayButtons();
          getContentPane().add(panel);
          setVisible(true);
     public void displayForm() throws SQLException{
          setTitle("Customer Form");
          setSize(700,500);
          // Center the frame
          Dimension dim = getToolkit().getScreenSize();
          setLocation(dim.width/2-getWidth()/2, dim.height/2-getHeight()/2);
          getContentPane().setLayout(new BorderLayout());
          Border etched = BorderFactory.createEtchedBorder();
          panel = new JPanel();
          panel.setLayout( null );
          Border paneltitled = BorderFactory.createTitledBorder(etched,"");
          panel.setBorder(paneltitled);
     public void displayFields() throws SQLException{
          int x = 10;
          int y = 50;
          int textheight = 20;
          int textwidth = 150;
          int labelwidth = 110;
          int ydist = textheight + 10;
          int xdist = textwidth*2;
          JLabel labelCustomer_id = new JLabel("Customer Number:");
          labelCustomer_id.setBounds( x, y, labelwidth, textheight);
          panel.add(labelCustomer_id);
          JLabel labelCustomer_name = new JLabel("Customer Name:");
          labelCustomer_name.setBounds(xdist, y, labelwidth, textheight);
          panel.add(labelCustomer_name);
          JLabel labelAddress1 = new JLabel("Address 1:");
          labelAddress1.setBounds( x, y+ydist, labelwidth, textheight);
          panel.add(labelAddress1);
          JLabel labelAddress2 = new JLabel("Address 2:");
          labelAddress2.setBounds( xdist, y+ydist, labelwidth, textheight);
          panel.add(labelAddress2);
          JLabel labelTown = new JLabel("Town:");
          labelTown.setBounds(x, y+ydist*2, labelwidth, textheight);
          panel.add(labelTown);
          JLabel labelCounty = new JLabel("County:");
          labelCounty.setBounds(xdist, y+ydist*2, labelwidth, textheight);
          panel.add(labelCounty);
          JLabel labelPost_code = new JLabel("Post Code:");
          labelPost_code.setBounds(x, y+ydist*3, labelwidth, textheight);
          panel.add(labelPost_code);
          JLabel labelCountry = new JLabel("Country:");
          labelCountry.setBounds(xdist, y+ydist*3, labelwidth, textheight);
          panel.add(labelCountry);
          JLabel labelTelephone = new JLabel("Phone:");
          labelTelephone.setBounds(x, y+ydist*4, labelwidth, textheight);
          panel.add(labelTelephone);
          JLabel labelFax = new JLabel("Fax:");
          labelFax.setBounds(xdist, y+ydist*4, labelwidth, textheight);
          panel.add(labelFax);
          JLabel labelContact_name = new JLabel("Contact Name:");
          labelContact_name.setBounds(x, y+ydist*5, labelwidth, textheight);
          panel.add(labelContact_name);
          JLabel labelEmail = new JLabel("E-mail address:");
          labelEmail.setBounds(xdist, y+ydist*5, labelwidth, textheight);
          panel.add(labelEmail);
          JLabel labelFind = new JLabel("Customer Number Search:");
          labelFind.setBounds( 40, 360, 200, textheight);
          panel.add(labelFind);
          textAddress1 = new JTextField();
          textAddress1.setBounds(x+labelwidth, y+ydist, textwidth, textheight);
          panel.add(textAddress1);
          textAddress2 = new JTextField();
          textAddress2.setBounds(xdist+labelwidth, y+ydist, textwidth, textheight);
          panel.add(textAddress2);
          textTown = new JTextField();
          textTown.setBounds(x+labelwidth, y+ydist*2, textwidth, textheight);
          panel.add(textTown);
          textCounty = new JTextField();
          textCounty.setBounds(xdist+labelwidth, y+ydist*2, textwidth, textheight);
          panel.add(textCounty);
          textPost_code = new JTextField();
          textPost_code.setBounds(x+labelwidth, y+ydist*3, textwidth, textheight);
          panel.add(textPost_code);
          textCountry = new JTextField();
          textCountry.setBounds(xdist+labelwidth, y+ydist*3, textwidth, textheight);
          panel.add(textCountry);
          textTelephone = new JTextField();
          textTelephone.setBounds(x+labelwidth, y+ydist*4, textwidth, textheight);
          panel.add(textTelephone);
          textFax = new JTextField();
          textFax.setBounds(xdist+labelwidth, y+ydist*4, textwidth, textheight);
          panel.add(textFax);
          textContact_name = new JTextField();
          textContact_name.setBounds(x+labelwidth, y+ydist*5, textwidth, textheight);
          panel.add(textContact_name);
          textEmail = new JTextField();
          textEmail.setBounds(xdist+labelwidth, y+ydist*5, textwidth+50, textheight);
          panel.add(textEmail);
          textFind = new JTextField();
          textFind.setBounds(200, 360, 80, textheight);
          panel.add(textFind);
          textCustomer_id = new JTextField();
          textCustomer_id.setBounds(x+labelwidth, y, textwidth, textheight);
          panel.add(textCustomer_id);
          textCustomer_name = new JTextField();
          textCustomer_name.setBounds(xdist+labelwidth, y, textwidth+50, textheight);
          panel.add(textCustomer_name);
          public boolean delete() {
          textCustomer_id.setText("");
          textCustomer_name.setText("");
          textAddress1.setText("");
          textAddress2.setText("");
          textTown.setText("");
          textCounty.setText("");
          textPost_code.setText("");
          textCountry.setText("");
          textTelephone.setText("");
          textFax.setText("");
          textContact_name.setText("");
          textEmail.setText("");
          textFind.setText("");
          return true;
     public void displayButtons(){
          firstCust= new JButton("FIRST");
          firstCust.addActionListener(this);
          firstCust.setBounds(50, 430, 100, 20 );
          panel.add( firstCust );
          nextCust = new JButton("NEXT");
          nextCust.addActionListener(this);
          nextCust.setBounds(150, 430, 100, 20 );
          panel.add( nextCust );
          prevCust = new JButton("PREVIOUS");
          prevCust.addActionListener(this);
          prevCust.setBounds(250, 430, 100, 20 );
          panel.add( prevCust );
          lastCust= new JButton("LAST");
          lastCust.addActionListener(this);
          lastCust.setBounds(350, 430, 100, 20 );
          panel.add( lastCust );
          findCust= new JButton("FIND");
          findCust.addActionListener(this);
          findCust.setBounds(350, 360, 100, 20 );
          panel.add( findCust );
          add = new JButton("ADD");
          add.addActionListener(this);
          add.setBounds(150, 400, 100, 20 );
          panel.add( add );
          save = new JButton("SAVE");
          save.addActionListener(this);
          save.setBounds(250, 400, 100, 20 );
          panel.add( save );
          jobs = new JButton("JOBS");
          jobs.addActionListener(this);
          jobs.setBounds(550, 360, 100, 20 );
          panel.add( jobs );
          close = new JButton("CLOSE");
          close.addActionListener(this);
          close.setBounds(550, 430, 100, 20 );
          panel.add( close );
          delete = new JButton("DELETE");
          delete.addActionListener(this);
          delete.setBounds(350, 400, 100, 20 );
          panel.add( delete );
     public void getTextFields(){
          currentCustomer.setCustomer_id(Integer.parseInt(textCustomer_id.getText()));
          currentCustomer.setCustomer_name(textCustomer_name.getText());
          currentCustomer.setAddress1(textAddress1.getText());
          currentCustomer.setAddress2(textAddress2.getText());
          currentCustomer.setTown(textTown.getText());
          currentCustomer.setCounty(textCounty.getText());
          currentCustomer.setPost_code(textPost_code.getText());
          currentCustomer.setCountry(textCountry.getText());
          currentCustomer.setFax(textFax.getText());
          currentCustomer.setTelephone(textTelephone.getText());
          currentCustomer.setContact_name(textContact_name.getText());
          currentCustomer.setEmail(textEmail.getText());
     public void setTextFields() throws SQLException{
          textCustomer_id.setText(String.valueOf(currentCustomer.getCustomer_id()));
          textCustomer_id.setEditable(false);
          textCustomer_name.setText(currentCustomer.getCustomer_name());
          textAddress1.setText(currentCustomer.getAddress1());
          textAddress2.setText(currentCustomer.getAddress2());
          textTown.setText(currentCustomer.getTown());
          textCounty.setText(currentCustomer.getCounty());
          textPost_code.setText(currentCustomer.getPost_code());
          textCountry.setText(currentCustomer.getCountry());
          textFax.setText(currentCustomer.getFax());
          textTelephone.setText(currentCustomer.getTelephone());
          textContact_name.setText(currentCustomer.getContact_name());
          textEmail.setText(currentCustomer.getEmail());
     public void actionPerformed(ActionEvent e) {
     Object source = e.getSource();
     try {
     if (source == nextCust)
     currentCustomer = inCustomerList.getNextCustomer();
     else if (source == prevCust)
     currentCustomer = inCustomerList.getPreviousCustomer();
     else if (source == findCust) {
     try {
     currentCustomer =
     inCustomerList.findCustomer(Integer.parseInt(textFind.getText()));
     catch (NumberFormatException ex) {
     JOptionPane.showMessageDialog(
     null, "Invalid Customer number", "ERROR",
     JOptionPane.ERROR_MESSAGE);
     if (currentCustomer == null) {
     JOptionPane.showMessageDialog(null, "Customer not found");
     currentCustomer = inCustomerList.getFirstCustomer();
     textFind.setText(null);
     else if (source == firstCust)
     currentCustomer = inCustomerList.getFirstCustomer();
     else if (source == lastCust)
     currentCustomer = inCustomerList.getLastCustomer();
     else if (source == add) {
     currentCustomer = inCustomerList.addCust();
     add.setEnabled(false);
     else if (source == delete) {
                    delete();
     else if (source == save) {
     add.setEnabled(true);
     getTextFields();
     currentCustomer = inCustomerList.saveCustomer(currentCustomer);
     //else if (source == jobs) {
     // JFrame newJobForm = new JobForm(currentCustomer.getJobList());
     //else if (source == delete) {
               //          setTextFields == null;
     else if (source == close) {
     dispose();
     setTextFields();
     nextCust.setEnabled(!inCustomerList.isLast());
     prevCust.setEnabled(!inCustomerList.isFirst());
     firstCust.setEnabled(!inCustomerList.isFirst());
     lastCust.setEnabled(!inCustomerList.isLast());
     catch (SQLException ex) {
     System.out.println("Failed");
     System.out.println(ex.getMessage());
     ex.printStackTrace();
     System.exit(-1);
THANKS A LOT TO WHO EVER THINKS THEY CAN DO THIS!!!

Answer 1

Hi Pcrighton:
Is this a trick question?
If you already knew how to trap the delete button, why can't you find out the record associated with the current customer and use Oracle SQL DELETE to delete that record from the table (assuming that user has permission to delete records from the database).
I don't have Oracle on my PC (have Oracle 7 on my RS/6000 but it's not hooked up to the network, also Java wasn't installed on that machine) so I can't show you anything.
V.V.