how to add database in Java Applet

hi every java master or Java Professional my name is vincent i'm java beginners hope u all can ,tech me how to add database in Java Applet below this code is my applet source code .

thank you

import javax.swing.*; import java.applet.*; import java.awt.*; import java.util.*; import java.text.*; import java.awt.event.*;

public class RC extends Applet implements ActionListener{ TextField text,text1,text2,text3,text4,text5,text6,text7; Label label1,label2,label3,label4,label5,label6,label7,label8,label9; Label lab; Button b1,b2; JComboBox combo; DecimalFormat df = new DecimalFormat("$##.##"); public void init(){ setLayout(null);

lab=new Label("Welcome to Rental Car System");
lab.setBounds(100,20,200,20);
add(lab);

label1 = new Label("Select Type of Car: ");
label1.setBounds(20,50,180,20);
add(label1);
combo=new JComboBox();
combo.addItem("--Select--");
combo.addItem("Honda City");
combo.addItem("Toyota Vios");
combo.addItem("Nissan Latio");
combo.addItem("Proton Iswara");
combo.addItem("Proton Waja");
combo.addItem("Perodua Myvi");
combo.addItem("Toyota Avenza");
combo.addItem("Honda Stream");
combo.addItem("Nissan Grand Livina");
combo.addItem("Perodua Alza");
combo.addItem("Proton Exora");
combo.setBounds(200,50,120,20);
add(combo);
label2 = new Label("Enter number of days: ");
label2.setBounds(20,80,180,20);
add(label2);

text = new TextField(5);
text.setBounds(200,80,100,20);
add(text);

b1 = new Button("Submit");
b1.setBounds(200,140,100,20);
add(b1);
b1.addActionListener(this);

label3=new Label("Enter Customer Name: ");
label3.setBounds(20,60,180,20);
add(label3);

text1=new TextField(10);
text1.setBounds(230,60,150,20);
add(text1);

label4=new Label("Enter IC Number: ");
label4.setBounds(20,90,180,20);
add(label4);

text2=new TextField(10);
text2.setBounds(230,90,150,20);
add(text2);

label5=new Label("Enter Age: ");
label5.setBounds(20,120,180,20);
add(label5);

text3=new TextField(10);
text3.setBounds(230,120,150,20);
add(text3);

label6=new Label("Enter Mobile Number: ");
label6.setBounds(20,150,180,20);
add(label6);

text4=new TextField(10);
text4.setBounds(230,150,150,20);
add(text4);
label7=new Label("Enter  E-Mail Address: ");
label7.setBounds(20,180,180,20);
add(label7);

text5=new TextField(10);
text5.setBounds(230,180,150,20);
add(text5);

label8=new Label("Enter  16 Digit of Credit Card Number: ");
label8.setBounds(20,210,210,20);
add(label8);

text6=new TextField(10);
text6.setBounds(230,210,150,20);
add(text6);

label9=new Label("Enter Pin Code of Credit Card: ");
label9.setBounds(20,240,180,20);
add(label9);

text7=new TextField(10);
text7.setBounds(230,240,150,20);
add(text7);

b2=new Button("Submit");
b2.setBounds(230,270,100,20);
add(b2);
label3.setVisible(false);
label4.setVisible(false);
label5.setVisible(false);
label6.setVisible(false);
label7.setVisible(false);
label8.setVisible(false);
label9.setVisible(false);
text1.setVisible(false);
text2.setVisible(false);
text3.setVisible(false);
text4.setVisible(false);
text5.setVisible(false);
text6.setVisible(false);
text7.setVisible(false);
b2.setVisible(false);
 }
     public void actionPerformed(ActionEvent ae){
String value=combo.getSelectedItem().toString();
int day=Integer.parseInt(text.getText());
if(value.equals("Honda City")){
    if(day>0){
final double amount=(day-0)*60.00 + 100.00; JOptionPane.showMessageDialog(null,"Vehicle type= Honda City \n" + " Deposit= Rm100 \n " + " Daily Rate= 60 \n" + "days= " + day+"\n\n"+"Rental Total Charges= "+df.format(amount)); String st=JOptionPane.showInputDialog(null,"Do you want to continue next Process?( y/n ): "); if(st.equals("y")){ label1.setVisible(false); label2.setVisible(false); text.setVisible(false); combo.setVisible(false); b1.setVisible(false); b2.setVisible(true); label3.setVisible(true); label4.setVisible(true); label5.setVisible(true); label6.setVisible(true); label7.setVisible(true); label8.setVisible(true); label9.setVisible(true); text1.setVisible(true); text2.setVisible(true); text3.setVisible(true); text4.setVisible(true); text5.setVisible(true); text6.setVisible(true); text7.setVisible(true); b2.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JOptionPane.showMessageDialog(null," Customer Name: " +text1.getText()+ "\n IC Number: " +text2.getText()+ "\n Age: " +text3.getText()+ "\n Mobile Number: " +text4.getText()+ "\n Rental Charger: "+ df.format(amount) ); } }); }

else{
    JOptionPane.showMessageDialog(null,"Thank survey to Rental Car System and See you Again....!");
}
}
}
else if(value.equals("Toyota Vios")){
    if(day>0){
final double amount=(day-0)*60.00 + 100.00; JOptionPane.showMessageDialog(null,"Vehicle type= Toyota Vios \n" + " Deposit= Rm100 \n " + " Daily Rate= 60 \n" + "days= " + day+"\n\n"+"Rental Total Charges= "+df.format(amount)); String st=JOptionPane.showInputDialog(null,"Do you want to continue next Process?( y/n ): "); if(st.equals("y")){ label1.setVisible(false); label2.setVisible(false); text.setVisible(false); combo.setVisible(false); b1.setVisible(false); b2.setVisible(true); label3.setVisible(true); label4.setVisible(true); label5.setVisible(true); label6.setVisible(true);

text1.setVisible(true);
text2.setVisible(true);
text3.setVisible(true);
text4.setVisible(true);
b2.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JOptionPane.showMessageDialog(null," Customer Name: " +text1.getText()+ "\n IC Number: " +text2.getText()+ "\n Age: " +text3.getText()+ "\n Mobile Number: " +text4.getText()+ "\n Rental Charger: "+ df.format(amount) ); } }); } else{ JOptionPane.showMessageDialog(null,"Thank survey to Rental Car System and See you Again....!"); } } } else if(value.equals("Nissan Latio")){ if(day>0){ final double amount=(day-0)*70.00 + 100.00; JOptionPane.showMessageDialog(null,"Vehicle type= Nissan Latio \n" + " Deposit= Rm100 \n " + " Daily Rate= 70 \n" + "days= " + day+"\n\n"+"Rental Total Charges= "+df.format(amount)); String st=JOptionPane.showInputDialog(null,"Do you want to continue next Process?( y/n ): "); if(st.equals("y")){ label1.setVisible(false); label2.setVisible(false); text.setVisible(false); combo.setVisible(false); b1.setVisible(false); b2.setVisible(true); label3.setVisible(true); label4.setVisible(true); label5.setVisible(true); label6.setVisible(true);

text1.setVisible(true);
text2.setVisible(true);
text3.setVisible(true);
text4.setVisible(true);
b2.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JOptionPane.showMessageDialog(null," Customer Name: " +text1.getText()+ "\n IC Number: " +text2.getText()+ "\n Age: " +text3.getText()+ "\n Mobile Number: " +text4.getText()+ "\n Rental Charger: "+ df.format(amount) ); } }); } else{ JOptionPane.showMessageDialog(null,"Thank survey to Rental Car System and See you Again....!"); } } } } }