i'm java beginner. Can some java master teach me how to write a login applet? combine with my coding

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

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

public void init(){ setLayout(null);

lab=new Label("WELCOME TO PIN'S BOAT RENTAL");
lab.setBounds(100,20,200,20);
add(lab);

label1 = new Label("Select Boat: ");
label1.setBounds(20,50,180,20);
add(label1);
combo=new JComboBox();
combo.addItem("--Select--");
combo.addItem("Taurus");
combo.addItem("Leo");
combo.addItem("Virgo");
combo.addItem("Libra");
combo.addItem("Scorpio");
combo.addItem("Capricorn");
combo.setBounds(200,50,120,20);
add(combo);
label2 = new Label("Enter hours of rent: ");
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 Contact 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 Credit Card Numbers: ");
label8.setBounds(20,210,210,20);
add(label8);

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

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);
text1.setVisible(false);
text2.setVisible(false);
text3.setVisible(false);
text4.setVisible(false);
text5.setVisible(false);
text6.setVisible(false);
b2.setVisible(false);

}

public void actionPerformed(ActionEvent ae){ String value=combo.getSelectedItem().toString(); int hour=Integer.parseInt(text.getText()); if(value.equals("Taurus")){ if(hour>0){ final double amount=(hour-0)*50.00 + 100.00; JOptionPane.showMessageDialog(null," Boat Name = Taurus \n" + " Deposit = RM100 \n " + "Hours Rate = RM50 \n" + " Rent Hours = " + hour+ "\n"+" Total Charges = "+df.format(amount)); String st=JOptionPane.showInputDialog(null,"Do you want to proceed to next step?( 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); text1.setVisible(true); text2.setVisible(true); text3.setVisible(true); text4.setVisible(true); text5.setVisible(true); text6.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 Contact Number: " +text4.getText()+ "\n E-mail Address: " +text5.getText()+ "\n Credit Card Numbers: " +text6.getText()+ "\n Total Charges:  "+ df.format(amount) );
    }
});
}

else{
    JOptionPane.showMessageDialog(null,"Thank You and See you Again!!!");
}
}
}
else if(value.equals("Leo")){
        if(hour>0){
final double amount=(hour-0)*55.00 + 100.00;
JOptionPane.showMessageDialog(null," Boat Name = Leo \n" + " Deposit = RM100 \n " + "Hours Rate= RM55 \n" + " Rent Hours = " + hour+"\n"+" Total Charges = "+df.format(amount));
String st=JOptionPane.showInputDialog(null,"Do you want to proceed to next step?( 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);
text1.setVisible(true);
text2.setVisible(true);
text3.setVisible(true);
text4.setVisible(true);
text5.setVisible(true);
text6.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 Contact Number: " +text4.getText()+ "\n E-mail Address: " +text5.getText()+ "\n Credit Card Numbers: " +text6.getText()+ "\n Total Charges:  "+ df.format(amount) );
    }
}); }
else{
    JOptionPane.showMessageDialog(null,"Thank You and See you Again!!!");
}
}
}

else if(value.equals("Virgo")){ if(hour>0){ final double amount=(hour-0)*60.00 + 100.00; JOptionPane.showMessageDialog(null," Boat Name = Virgo \n" + " Deposit = RM100 \n " + "Hours Rate = RM60 \n" + " Rent Hours = " + hour+"\n"+" Total Charges = "+df.format(amount)); String st=JOptionPane.showInputDialog(null,"Do you want to proceed to next step?( 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); text1.setVisible(true); text2.setVisible(true); text3.setVisible(true); text4.setVisible(true); text5.setVisible(true); text6.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 Contact Number: " +text4.getText()+ "\n E-mail Address: " +text5.getText()+ "\n Credit Card Numbers: " +text6.getText()+ "\n Total Charges: "+ df.format(amount) ); } }); } else{ JOptionPane.showMessageDialog(null,"Thank You and See you Again!!!"); } } } else if(value.equals("Libra")){ if(hour>0){ final double amount=(hour-0)*65.00 + 100.00; JOptionPane.showMessageDialog(null," Boat Name = Libra \n" + " Deposit = RM100 \n " + "Hours Rate= RM65 \n" + " Rent Hours = " + hour+"\n"+" Total Charges = "+df.format(amount)); String st=JOptionPane.showInputDialog(null,"Do you want to proceed to next step?( 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); text1.setVisible(true); text2.setVisible(true); text3.setVisible(true); text4.setVisible(true); text5.setVisible(true); text6.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 Contact Number: " +text4.getText()+ "\n E-mail Address: " +text5.getText()+ "\n Credit Card Numbers: " +text6.getText()+ "\n Total Charges:  "+ df.format(amount) );
    }
}); }
else{
    JOptionPane.showMessageDialog(null,"Thank You and See you Again!!!");
}
}
}
else if(value.equals("Scorpio")){
        if(hour>0){
final double amount=(hour-0)*70.00 + 100.00;
JOptionPane.showMessageDialog(null," Boat Name = Scorpio \n" + " Deposit = RM100 \n " + "Hours Rate= RM70 \n" + " Rent Hours = " + hour+"\n"+" Total Charges = "+df.format(amount));
String st=JOptionPane.showInputDialog(null,"Do you want to proceed to next step?( 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);
text1.setVisible(true);
text2.setVisible(true);
text3.setVisible(true);
text4.setVisible(true);
text5.setVisible(true);
text6.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 Contact Number: " +text4.getText()+ "\n E-mail Address: " +text5.getText()+ "\n Credit Card Numbers: " +text6.getText()+ "\n Total Charges:  "+ df.format(amount) );
    }
}); }
else{
    JOptionPane.showMessageDialog(null,"Thank You and See you Again!!!");
}
}
}
else if(value.equals("Capricorn")){
        if(hour>0){
final double amount=(hour-0)*75.00 + 100.00;
JOptionPane.showMessageDialog(null," Boat Name = Capricorn \n" + " Deposit = RM100 \n " + "Hours Rate= RM75 \n" + " Rent Hours = " + hour+"\n"+" Total Charges = "+df.format(amount));
String st=JOptionPane.showInputDialog(null,"Do you want to proceed to next step?( 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);
text1.setVisible(true);
text2.setVisible(true);
text3.setVisible(true);
text4.setVisible(true);
text5.setVisible(true);
text6.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 Contact Number: " +text4.getText()+ "\n E-mail Address: " +text5.getText()+ "\n Credit Card Numbers: " +text6.getText()+ "\n Total Charges:  "+ df.format(amount) );
    }
}); }
else{
    JOptionPane.showMessageDialog(null,"Thank You and See you Again!!!");
}
}
}
}

}