这是我的登录类：
package mangInasal;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class MILogin extends JFrame {
private JLabel lblUsername, lblPassword;
private JTextField txtUsername;
private JPasswordField txtPassword;
private JButton btnLogin, btnCancel;
public MILogin() {
super("Login");
setLayout(new FlowLayout());
lblUsername = new JLabel("Username: ");
add(lblUsername);
txtUsername = new JTextField(10);
add(txtUsername);
lblPassword = new JLabel("Password: ");
add(lblPassword);
txtPassword = new JPasswordField(10);
add(txtPassword);
btnLogin = new JButton("Login");
add(btnLogin);
btnCancel = new JButton("Cancel");
add(btnCancel);
ActionListener listener = new ButtonListener();
btnLogin.addActionListener(listener);
btnCancel.addActionListener(listener);
}
private class ButtonListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
JButton source = (JButton) e.getSource();
String username = txtUsername.getText().toUpperCase();
String pass = txtPassword.getText();
if (source == btnLogin) {
if (username.equals("TIPQC") && (pass.equals("ABET"))) {
String okay = "defimages/loginsuccess.gif";
java.net.URL imgURL = getClass().getClassLoader().getResource(okay);
ImageIcon okpic = new ImageIcon(imgURL);
JOptionPane.showMessageDialog(null, "WELCOME", "Correct Input", JOptionPane.PLAIN_MESSAGE, okpic);
dispose();
mangInasaldef manginasaldef = new mangInasaldef();
manginasaldef.run();
} else {
String okay = "defimages/loginfail.gif";
java.net.URL imgURL = getClass().getClassLoader().getResource(okay);
ImageIcon failpic = new ImageIcon(imgURL);
JOptionPane.showMessageDialog(null, "Incorrect Username or Password", "Message Dialog", JOptionPane.PLAIN_MESSAGE, failpic);
}
}
if (source == btnCancel) {
System.exit(1);
}
}
}
public void run() {
setSize(200, 200);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setResizable(false);
}
public static void main(String[] args) {
MILogin milogin = new MILogin();
milogin.run();
}
}
这是我的主要课程：
package mangInasal;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
public class mangInasaldef extends JFrame{ //class name
private static String username = "";
private static String customername = "";
private static String dineOut = "";
private String order = "";
private String order1 = "";
private String order2 = "";
private String order3 = "";
private String order4 = "";
private String order5 = "";
private String order6 = "";
private String order7 = "";
private String order8 = "";
private String order9 = "";
private String order10 = "";
private String order11 = "";
private String order12 = "";
private String order13 = "";
private String order14 = "";
private String order15 = "";
private String order16 = "";
private String order17 = "";
private int total = 0;
private int totalSpicy = 0;
private int total1 = 0;
private int total2= 0;
private int total3 = 0;
private int total4 = 0;
private int total5 = 0;
private int total6 = 0;
private int total7 = 0;
private int total8 = 0;
private int total9 = 0;
private int total10 = 0;
private int total11 = 0;
private int total12 = 0;
private int total13 = 0;
private int total14 = 0;
private int total15 = 0;
private int total16 = 0;
private int total17 = 0;
private int totalOrder = total + totalSpicy + total1 + total2 + total3 + total4 + total5 + total6 + total7 + total8 + total9 + total10 + total11 + total12 + total13 + total14 + total15;
private double vatCollected = totalOrder * 0.12;
private boolean exact = true; // a boolean variable that is declared private in order to be accessed by different methods
private double change, cashTendered;
private static int cashAmount;
private static Scanner inp = new Scanner(System.in); // private static declared Scanner which allows the user to input characters or strings by different methods
private JLabel lblUsername, lblPassword;
private JTextField txtUsername;
private JPasswordField txtPassword;
private JButton btnLogin, btnCancel;
public mangInasaldef() {
boolean repeatLoop = true;
System.out.print("\nInput Customer Name: ");
String customerName = inp.nextLine();
customername = customerName;
System.out.print("\nInput Cashier Name: ");
String user = inp.nextLine();
username = user;
do{
System.out.print("\nInput either Dine In or Take Out: ");
String dInDOut = inp.nextLine();
dineOut = dInDOut;
if (dineOut.equals("Dine In") || dineOut.equals("Take Out")){
System.out.print("");
repeatLoop = false;
}
else{
JOptionPane.showMessageDialog(null, "Try again! Please input Dine In or Take Out only!","Error", JOptionPane.ERROR_MESSAGE);
repeatLoop = true;
System.out.print ("\f");
}
}while(repeatLoop);
System.out.print("\n\n\t\tCashier: " +username);
System.out.print(" "+dineOut);
System.out.print("\n\t\tCustomer Name: " +customername);
EventQueue.invokeLater(new Runnable() {
@Override
public void run()
{
new mangInasaldef();
}
});
}
public mangInasaldef() {
JFrame frame = new JFrame("Mang Inasal Ordering System");
JPanel panel = new JPanel();
String choices[] = {"Paborito Meal 1 Paa","Paborito Meal 1.5 (Spicy Paa with Thigh part)","Paborito Meal 2 (Pecho)","Paborito Meal 3 (Pork Barbeque 4 pcs)","Paborito Meal 4 (Bangus Sisig)","Paborito Meal 5 (Pork Sisig)","Paborito Meal 6 (Bangus Inihaw)","Sulit Meal 1 (Paa)","Sulit Meal 2 (Pork Barbeque 2 pcs)","Pancit Bihon","Dinuguan at Puto","Ensaladang Talong","Softdrinks","Iced Tea","HaloHalo","Leche Flan","Turon Split","Print Receipt"};
JComboBox combo = new JComboBox(choices);
combo.setBackground(Color.black);
combo.setForeground(Color.yellow);
panel.add(combo);
frame.add(panel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(350,100);
frame.setVisible(true);
combo.addItemListener(new ItemListener () {
@Override
public void itemStateChanged(ItemEvent e)
{
String item = (String)e.getItem();
if (e.getStateChange () == ItemEvent.SELECTED)
{
System.out.print("\nYou chose " +item);
if (item.equals("Paborito Meal 1 Paa"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of PM1");
Integer bilang= Integer.valueOf((String)val);
total = bilang * 99;
order = " " + bilang + " " + " PM1 PAA W/ RICE" +" "+ total + ".00V" + "\n"; //stores the values of the variables bilang and total in the variable order and prints them
}
if (item.equals("Paborito Meal 1.5 (Spicy Paa with Thigh part)"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of PM1.5");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
totalSpicy = bilang * 99;
order1 = " " + bilang + " " + " PM1.5 PAA" +" "+ totalSpicy + ".00V" + "\n"; //stores the values of the variables bilang and total in the variable order and prints them
}
if (item.equals("Paborito Meal 2 (Pecho)"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of PM2");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total1 = bilang * 99;
order2 = " " + bilang + " " + " PM2 PECHO W/ RICE" +" "+ total1 + ".00V" + "\n";
}
if (item.equals("Paborito Meal 3 (Pork Barbeque 4 pcs)"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of PM3");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total2 = bilang * 99;
order3 = " " + bilang + " " + " PM3 PORK BBQ W/ RICE " +" "+ total2 + ".00V" + "\n";
}
if (item.equals("Paborito Meal 4 (Bangus Sisig)"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of PM4");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total3 = bilang * 99;
order4 = " " + bilang + " " + " PM4 BANGUS SISIG " +" "+ total3 + ".00V" + "\n";
}
if (item.equals("Paborito Meal 5 (Pork Sisig)"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of PM5");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total4 = bilang * 99;
order5 = " " + bilang + " " + " PM5 PORK SISIG " +" "+ total4 + ".00V" + "\n";
}
if (item.equals("Paborito Meal 6 (Bangus Inihaw)"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of PM6");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total5 = bilang * 99;
order6 = " " + bilang + " " + " PM6 BANGUS INIHAW " +" "+ total5 + ".00V" + "\n";
}
if (item.equals("Sulit Meal 1 (Paa)"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of SM1");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total6 = bilang * 59;
order7 = " " + bilang + " " + " SM1 PAA " +" "+ total6 + ".00V" + "\n";
}
if (item.equals("Sulit Meal 2 (Pork Barbeque 2 pcs)"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of SM2");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total7 = bilang * 59;
order8 = " " + bilang + " " + " SM2 PORK BBQ 2 " +" "+ total7 + ".00V" + "\n";
}
if (item.equals("Pancit Bihon"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of Pancit Bihon");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total8 = bilang * 49;
order9 = " " + bilang + " " + " Pancit Bihon " +" "+ total8 + ".00V" + "\n";
}
if (item.equals("Dinuguan at Puto"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of Dinuguan");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total9 = bilang * 49;
order10 = " " + bilang + " " + " Dinuguan at Puto " +" "+ total9 + ".00V" + "\n";
}
if (item.equals("Ensaladang Talong"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of Ensaladang Talong");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total10 = bilang * 29;
order12 = " " + bilang + " " + " Ensaladang Talong " +" "+ total10 + ".00V" + "\n";
}
if (item.equals("Softdrinks"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of Softdrinks");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total11 = bilang * 25;
order13 = " " + bilang + " " + " Softdrinks " +" "+ total11 + ".00V" + "\n";
}
if (item.equals("Iced Tea"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of Iced Tea");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total12 = bilang * 25;
order14 = " " + bilang + " " + " Iced Tea " +" "+ total12 + ".00V" + "\n";
}
if (item.equals("HaloHalo"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of HaloHalo");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total13 = bilang * 49;
order15 = " " + bilang + " " + " HaloHalo " +" "+ total13 + ".00V" + "\n";
}
if (item.equals("Leche Flan"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of Leche Flan");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total14 = bilang * 29;
order16 = " " + bilang + " " + " Leche Flan " +" "+ total14 + ".00V" + "\n";
}
if (item.equals("Turon Split"))
{
Object val = JOptionPane.showInputDialog("Please input quantity of Turon Split");
System.out.print(val);
Integer bilang= Integer.valueOf((String)val);
total15 = bilang * 39;
order17 = " " + bilang + " " + " Turon Split " +" "+ total15 + ".00V";
}
if (item.equals("Print Receipt")) // if Print Receipt was selected it will go to the method computeReceipt
{
System.out.print("\f"); // clears the screen
computeReceipt();
}
}
}
});
}
public void computeReceipt() {
totalOrder = total + totalSpicy + total1 + total2 + total3 + total4 + total5 + total6 + total7 + total8 + total9 + total10 + total11 + total12 + total13 + total14 + total15;
vatCollected = totalOrder * 0.12;
exact = true;
do{
System.out.print("\n\n\tYour total bill is: "+totalOrder);
exact = false;
Object cashMo = JOptionPane.showInputDialog("Please input here your cash");
System.out.println(cashMo);
cashAmount = Integer.valueOf((String)cashMo);
exact = false;
change = cashAmount - totalOrder;
if (cashAmount < totalOrder) {
JOptionPane.showMessageDialog(null, "Try again. Please enter sufficient money to proceed.","Invalid Input", JOptionPane.ERROR_MESSAGE);
exact = true;
}
}while(exact);
System.out.print("\f");
etoPoeReceipt();
}
public void etoPoeReceipt() {
DateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss");
Date date = new Date();
System.out.print("\n MANG INASAL");
System.out.print("\n BLUMENTRITT BRANCH");
System.out.print("\n #1631-1633 BLUMENTRITT ST.,");
System.out.print("\n STA CRUZ. MANILA 0000");
System.out.print("\n (932) 885-5844");
System.out.print("\n Operated by: R L YU");
System.out.print("\n TIN 202-161-017-000 VAT");
System.out.print("\n ACC. NO.: 050-204079836-000019");
System.out.print("\n Tel. #: (02)493-6801");
System.out.print("\n\n Cashier: " +username);
System.out.print(" STATION: 2");
System.out.print("\n ---------------------------------------------");
System.out.print("\n O.R #: 84486");
System.out.print(" "+dineOut);
System.out.print("\n Customer Name: " +customername);
System.out.print(" 24");
System.out.print("\n ---------------------------------------------");
System.out.print("\n >>SETTLED<<\n");
System.out.print(""+order );
System.out.print(""+order1 );
System.out.print(""+order2 );
System.out.print(""+order3 );
System.out.print(""+order4 );
System.out.print(""+order5 );
System.out.print(""+order6 );
System.out.print(""+order7 );
System.out.print(""+order8 );
System.out.print(""+order9 );
System.out.print(""+order10 );
System.out.print(""+order11 );
System.out.print(""+order12 );
System.out.print(""+order13 );
System.out.print(""+order14 );
System.out.print(""+order15 );
System.out.print(""+order16 );
System.out.print(""+order17 );
System.out.print("\n\n SUB TOTAL: "+totalOrder+ ".00");
System.out.print("\n DELIVERY VAT: 0.00");
System.out.print("\n ======");
System.out.print("\n AMOUNT DUE: "+totalOrder+ ".00\n\n");
System.out.printf(" VAT COLLECTED %.2f",vatCollected); // declares that the variable should be in two decimal places. % is called format specifier and f is the converter
System.out.println("");
System.out.print(" CASH Tendered: "+cashAmount+ ".00");
System.out.print("\n ======");
System.out.printf("\n CHANGE: %.2f",change);
System.out.print("\n >>Ticket #: 62<<");
System.out.print("\n Created: ");
System.out.print(dateFormat.format(date));
System.out.print("\n SETTLED: ");
System.out.print(dateFormat.format(date));
System.out.print("\n\n *********************************************");
System.out.print("\n THIS SERVES AS AN OFFICIAL RECEIPT.");
System.out.print("\n\n For Feedback: TEXT MIO467(Comments/ Suggest");
System.out.print("\n ions) and SEND to 0917-5941111 or CALL US");
System.out.print("\n at 0917-5596258");
System.out.print("\n Email: feedback@manginasal.com");
System.out.print("\n\n THANK YOU FOR DINING WITH US!");
System.out.print("\n\n *********************************************");
System.out.print("\n S/N: 120416ASL03/1105-6105-9230");
System.out.print("\n DT S/N: 41-L6971 (P0S1)");
System.out.print("\n PERMIT NO: 0412-031-125295-000");
System.out.print("\n MIN: 120276752");
}
}
登录类成功访问后，不再继续main方法。我不知道需要操作哪些代码才能将登录类连接到主类。感谢那些愿意提供帮助的人！:)