Apua pyydetään Java-osaajilta

package suomi24;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Vector;

/**
* Title:
* Description:
* Copyright: Copyright (c) 2003
* Company:
* @author not attributable
* @version 1.0
*/

public class PalkkaFrame extends JFrame {

private Vector data = new Vector();
private PersonData current = null; //liputtaa moden
private int currelement =-1;

JPanel contentPane;
JButton jButton1 = new JButton();
JButton jButton2 = new JButton();
JButton jButton4 = new JButton();
JTextField jTextField1 = new JTextField();
JTextField jTextField2 = new JTextField();
JTextField jTextField3 = new JTextField();
JLabel jLabel1 = new JLabel();
JLabel jLabel2 = new JLabel();
JLabel jLabel3 = new JLabel();
JTextField jTextField4 = new JTextField();
JLabel jLabel4 = new JLabel();
JButton jButton3 = new JButton();
JButton jButton5 = new JButton();

//Construct the frame
public PalkkaFrame() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}



private void validate(String first, String last,String age,String salary){
String error = "";
int iage=-1;double dSalary=-1.0;
try{ iage = Integer.parseInt(age);}catch(Exception ex){error = "Ikä on oltava luku";}
try{dSalary =Double.parseDouble(salary);}catch(Exception ex){
error = error " palkan on oltava luku";}
if(error.length() >0){
javax.swing.JOptionPane.showMessageDialog(this,error,"Error",JOptionPane.ERROR_MESSAGE);
}else{
current = new PersonData(first,last,iage,dSalary);
this.jTextField1.setText("");
this.jTextField2.setText("");
this.jTextField3.setText("");
this.jTextField4.setText("");
this.jButton4.setText("Talleta");
}

int size = this.data.size();
for(int i =0;i0){
PersonData values = (PersonData)data.elementAt(index);
if(values != null){
this.jTextField1.setText(values.firstname);
this.jTextField2.setText(values.surename);
this.jTextField3.setText("" values.age);
this.jTextField4.setText("" values.salary);
}else{
this.jTextField1.setText("");
this.jTextField2.setText("");
this.jTextField3.setText("");
this.jTextField4.setText("");
}
}
}

//Component initialization
private void jbInit() throws Exception {
contentPane = (JPanel) this.getContentPane();
jButton1.setBounds(new Rectangle(21, 257, 80, 30));
jButton1.setText("Alkuun");
jButton1.addActionListener(new PalkkaFrame_jButton1_actionAdapter(this));
contentPane.setLayout(null);
this.setSize(new Dimension(400, 300));
this.setTitle("suomi24_fi javaapuja");
jButton2.setBounds(new Rectangle(124, 215, 80, 30));
jButton2.setText("Edellinen");
jButton2.addActionListener(new PalkkaFrame_jButton2_actionAdapter(this));
jButton4.setBounds(new Rectangle(227, 215, 80, 30));
jButton4.setText("Lisää");
jButton4.addActionListener(new PalkkaFrame_jButton4_actionAdapter(this));
//jTextField1.setText("jTextField1");
jTextField1.setBounds(new Rectangle(201, 18, 178, 33));
//jTextField2.setText("jTextField2");
jTextField2.setBounds(new Rectangle(201, 66, 178, 33));
//jTextField3.setText("jTextField3");
jTextField3.setBounds(new Rectangle(201, 115, 178, 33));
jLabel1.setText("Etunimi");
jLabel1.setBounds(new Rectangle(93, 23, 85, 23));
jLabel2.setText("Sukunimi");
jLabel2.setBounds(new Rectangle(93, 71, 85, 23));
jLabel3.setText("Ikä");
jLabel3.setBounds(new Rectangle(93, 120, 85, 23));
//jTextField4.setText("jTextField4");
jTextField4.setBounds(new Rectangle(201, 163, 178, 33));
jLabel4.setText("Palkka");
jLabel4.setBounds(new Rectangle(93, 168, 85, 23));
jButton3.setBounds(new Rectangle(124, 257, 80, 30));
jButton3.setText("Seuraava");
jButton3.addActionListener(new PalkkaFrame_jButton3_actionAdapter(this));
jButton5.setBounds(new Rectangle(227, 257, 80, 30));
jButton5.setText("Poista");
jButton5.addActionListener(new PalkkaFrame_jButton5_actionAdapter(this));
contentPane.add(jTextField1, null);
contentPane.add(jTextField2, null);
contentPane.add(jTextField3, null);
contentPane.add(jTextField4, null);
contentPane.add(jLabel1, null);
contentPane.add(jLabel2, null);
contentPane.add(jLabel3, null);
contentPane.add(jLabel4, null);
contentPane.add(jButton1, null);
contentPane.add(jButton2, null);
contentPane.add(jButton3, null);
contentPane.add(jButton4, null);
contentPane.add(jButton5, null);
}
//Overridden so we can exit when window is closed
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
}
}

void jButton5_actionPerformed(ActionEvent e) {
if(this.currelement > 0)
this.data.remove(this.currelement);

}

void jButton4_actionPerformed(ActionEvent e) {
if(this.current ==null){
String n1=this.jTextField1.getText();
String n2= this.jTextField2.getText();
String age = this.jTextField3.getText();
String salary = this.jTextField4.getText();
this.validate(n1,n2,age,salary);
}else{
if(this.currelement ==-1)
this.data.addElement(current);
else
this.data.setElementAt(current,currelement);
this.jButton4.setText("Lisää");
current = null;
currelement=-1;
}
}

void jButton1_actionPerformed(ActionEvent e) {
this.getValuesFromData(0);
this.currelement =0;
}



void jButton2_actionPerformed(ActionEvent e) {
// int index =this.data.indexOf(current);
// if(index >0)
// this.getValuesFromData(--index);
if(this.currelement > 0)
this.getValuesFromData(--this.currelement);
else if(this.currelement==-1 && this.data.size() >0) {
this.currelement =this.data.size();
this.getValuesFromData(--this.currelement);
}

}

void jButton3_actionPerformed(ActionEvent e) {
// int index = this.data.indexOf(current);
// if(index