how to use setBounds() method??

[Kunal Lakhani]

i am not using any layout, but, instead using setBounds method. is there any restriction with setBounds method. See the following code.

   
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
/*<applet code="Login" width=300 height=250>
 * </applet>
*/

public class Login extends JFrame implements ActionListener {
    JLabel U_Name, Password;
    JTextField User;
    JPasswordField Pass;
    JButton L,E;
    public static void main(String[] args) {
        Login L1=new Login();
        L1.go();

    }
    public void go() {

    JFrame jf=new JFrame();
    JPanel jl=new JPanel();
  setLayout(null);
   U_Name=new JLabel("USERNAME");
   Password=new JLabel("PASSWORD");
   User=new JTextField(12);
   Pass=new JPasswordField(12);
   L=new JButton("LOGIN");
   E=new JButton("EXIT");
   
   jl.add(U_Name);
   jl.add(User);
   jl.add(Password);
   jl.add(Pass);
   jl.add(L);
    L.setBounds(150, 50, 50, 20 );
   L.addActionListener(this);
   ************************jf.getContentPane();
   jf.setSize(250,200);
   jf.setVisible(true);
   }

   public void actionPerformed(ActionEvent e) {
       if(e.getSource()==E)
		{
			System.exit(0);
		}
		if(e.getSource()==L)
		{
       String msg=User.getText();
       String msg1=Pass.getText();
       if(msg.equals("AUTHORIZED")&&(msg1.equals("100"))) {
           System.out.println("Welcome, Authorized User");
           MenuOptions mo=new MenuOptions();
           mo.go();
          // jf.dispose();
       }
       else if (msg.equals("OPERATOR")&&(msg1.equals("101")))
           System.out.println("Welcome, OPERATOR");
       else System.out.println("Login Unsuccessful");
   }
}
}


 

what should i provide in contentpane(marked '*')? and how will setBound work?

[Rob Spoor]

You need to add "jf.add(jl)" or call "jf.getContentPane().add(jl)" (these two actually do the same). However, the call to setBounds will still be ignored. That's because the direct parent of L, jl, still has a LayoutManager that will reposition L.

[Kunal Lakhani]

so, how can i use setBounds in this example?

[Michael Dunn]

> so, how can i use setBounds in this example?

how would anyone exist without the internet?

http://download.oracle.com/javase/tutorial/uiswing/layout/none.html

the smart ones would resort to reading.

[Kunal Lakhani]

In the above codings, how can i use dispose() method? I want that, if the user is AUTHORIZED, a new window named 'menuoptions' opens.. and previous window("login") is removed automatically.. i have removed the dispose method with comment in the coding provided above

[Kunal Lakhani]

In the above codings, how can i use dispose() method? I want that, if the user is AUTHORIZED, a new window named 'menuoptions' opens.. and previous window("login") is removed automatically.. i have removed the dispose method with comment in the coding provided above

[Michael Dunn]

the simple answer in an applet is to use a CardLayout