package Project;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class mydlg extends JDialog
{
JButton b1,b2;
JLabel f1;
public mydlg(JFrame f,String t,boolean b)
{
super(f,t,b);
Container con=getContentPane();
con.setLayout(new FlowLayout());
b1=new JButton(new ImageIcon("images/diamond.gif"));
f1=new JLabel("Oops!!! You Must Enter the correct Password.");
b2=new JButton("OK");
con.setLocation(250, 250);
con.add(b1);
con.add(f1);
con.add(b2);
f.setDefaultCloseOperation(HIDE_ON_CLOSE);
b2.setSize(250,250);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
con.setBackground(Color.orange);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
b2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
});
}
}
public class Login extends JFrame implements ActionListener{
String str;
JTextField lt;
TextField pt;
JButton ba;
JLabel ll,pl,jb1;
public Login() throws Exception
{
Container con=getContentPane();
con.setLayout(new FlowLayout());
jb1=new JLabel(new ImageIcon("images/login1.jpg"));
con.add(jb1);
con.setBackground(Color.cyan);
//con.setSize(1300, 1400);
lt=new JTextField(20);
pt=new TextField(20);
pt.setEchoChar('*');
ll=new JLabel("Username:");
pl=new JLabel("Password:");
lt.setText("Admin");
ba=new JButton("LOGIN");
ll.setBounds(45,80,150,30);
lt.setBounds(140,80,150,30);
pl.setBounds(45,140,150,30);
pt.setBounds(140,140,150,30);
ba.setBounds(140,200,90,30);
con.add(ll);
con.add(lt);
con.add(pl);
con.add(pt);
con.add(ba);
ba.addActionListener(this);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
public void actionPerformed(ActionEvent ae){
try{
if(ae.getSource()==ba){
if(pt.getText().equals("TDJSS")){
new PrjtMain();
//rm.setSize(700,700);
//rm.setVisible(true);
}
else{
mydlg md=new mydlg(this,"Error Login Message",false);
md.setSize(300,200);
md.setLocationRelativeTo( null );
md.setVisible(true);
String cmd = ae.getActionCommand();
if(cmd.equals("OK"))
{
System.exit(0);
}
}
}
}catch(Exception ex){}
}
public static void main(String arg[])throws Exception
{
Login l=new Login();
l.setSize(350,350);
l.setLocationRelativeTo( null );
l.setTitle("LOGIN");
l.setVisible(true);
}
}
海....我成功运行此代码。但是当我单击登录按钮而不输入密码时,它显示一条错误消息。之后,当我单击“确定”按钮时,两个框架同时关闭。我想让主登录页面保持不变..请帮助我..提前致谢。