Register and Login
Register and Login
This program show a simple user interface with two buttons, one button for registration and another from login. User can register with the system; user has to click register button; as register button is clicked a form with username, password and retype password textfield will appear, user has to provide name, password twice, then that inforamtion will be stored in ArrayList object.
The user can login into the system by clicking on the login button. After clicking on the login button user has to provide user name and password; the user name and password will be compared with the user name and password stored in the list of users; if found welcome message is shown otherwise not welcome.
This program stores user information only if the system is running.Two buttons and two jpanels objects are created. One panel contains controls to take user information, another panel contains controls for providing username and password. The panel as visible only after clicking login or register button. There is a third button which shows the name of registered users.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
class users{
String name,pwd;
public users() {
}
public void set(String name,String pwd) {
this.name = name;
this.pwd = pwd;
}
public String getName() {
return name;
}
public String getPassword() {
return pwd;
}
}
public class log_reg extends JFrame implements ActionListener {
ArrayList u = new ArrayList();
users uu;
JPanel p1, p2;
JButton btn1,btn2,btnLog,btnReg,btnshowusers;
JTextField tname, tpwd;
JTextField rtname,rtpwd,rertpwd;
JList list;
DefaultListModel dlm;
public log_reg() {
uu = new users();
btn1 = new JButton("Login");btn1.setBounds(20,20,100,22);
btn2 = new JButton("Register");btn2.setBounds(20,45,100,22);
btnshowusers = new JButton("Show Users");btnshowusers.setBounds(20,70,100,22);
dlm = new DefaultListModel();
list = new JList(dlm);list.setBounds(130,20,200,300);
p1 = new JPanel();p1.setBounds(130,20,300,300);
p1.setLayout(null);
tname = new JTextField(10);tname.setBounds(20,20,100,22);
tpwd = new JTextField(10);tpwd.setBounds(20,45,200,22);
btnLog = new JButton("Login");btnLog.setBounds(20,70,200,22);
p1.setBackground(Color.BLUE);
p1.add(tname);
p1.add(tpwd);
p1.add(btnLog);
p1.setVisible(false);
p2 = new JPanel();p2.setBounds(130,20,300,300);
p2.setBackground(Color.CYAN);
rtname = new JTextField(10);rtname.setBounds(20,20,100,22);
rtpwd = new JTextField(10);rtpwd.setBounds(20,45,200,22);
rertpwd = new JTextField(10);rertpwd.setBounds(20,70,200,22);
btnReg = new JButton("Register");btnReg.setBounds(20,95,200,22);
p2.setVisible(false);
p2.setLayout(null);
p2.add(rtname);
p2.add(rtpwd);
p2.add(rertpwd);
p2.add(btnReg);
setLayout(null);
setVisible(true);
setSize(500,400);
add(btn1);
add(btn2);
add(btnshowusers);
add(p1);//login form
add(p2);//registration form
add(list);
list.setVisible(false);
btn1.addActionListener(this);
btn2.addActionListener(this);
btnshowusers.addActionListener(this);
btnLog.addActionListener(this);
btnReg.addActionListener(this);
}
public void actionPerformed(ActionEvent ae) {
if(ae.getSource()==btn1) {
p1.setVisible(true);
p2.setVisible(false);
list.setVisible(false);
}else if(ae.getSource()==btn2) {
p1.setVisible(false);
p2.setVisible(true);
list.setVisible(false);
}else if(ae.getSource()==btnshowusers) {
dlm.clear();
for(int i=0;i<u.size();i++) {
dlm.addElement(u.get(i).getName());
System.out.println("Name: "+u.get(i).getName());
list.setVisible(true);
p1.setVisible(false);
p2.setVisible(false);
}
}else if(ae.getSource()==btnReg) {
uu = new users();
uu.set(rtname.getText(),rtpwd.getText());
u.add(uu);
rtname.setText("");rtpwd.setText("");rertpwd.setText("");
}else if(ae.getSource()== btnLog) {
for(int i=0;i<u.size();i++) {
if(u.get(i).getName().equals(tname.getText()) && u.get(i).getPassword().equals(tpwd.getText())) {
btnLog.setText("WelCome !!!");
btnLog.setBackground(Color.RED);
break;
}else {
btnLog.setText("Not WelCome !!!");
btnLog.setBackground(Color.yellow);
}
}
}
}
public static void main(String[] owl) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new log_reg();
}
});
}
}
