Java.awt.Container.add(Container.java:345) how can i handle this

Question

dear all,
i want to design an outlook for a chat applet. but this seems to tough as i am getting a run time error
my code is:
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
* the import that are required for this class
public class outer extends Frame //implements ActionListener, Runnable
private TextField txtusername,txtpassword,txtroomname;
private Label lblusername,lblpassword,lblroomname,lbllistofrooms;
Button okBtn,exitBut;
Color backColor=null,btnBackClr=null,btnForeClr=null;
String[] roomsavailable = {" one ", " two ", " three", " four"};
private JList rooms = new JList(roomsavailable);
/** the costructor*/
public outer()
{ // super(st);
backColor=new Color(200,200,255);
btnBackClr=new Color(225,240,255);
btnForeClr=new Color(205,205,205);
setBackground(backColor);
setLayout(null);
lblusername = new Label("Username");
lblusername.reshape(insets().left+5,insets().top+10,60,20);
add(lblusername);
txtusername=new TextField();
txtusername.reshape(insets().left+75,insets().top+10,60,20);
add(txtusername);
lblpassword = new Label("Password");
lblpassword.reshape(insets().left+5,insets().top+30,60,20);
add(lblpassword);
txtpassword=new TextField();
txtpassword.reshape(insets().left+75,insets().top+30,60,20);
add(txtpassword);
lblroomname = new Label("Select Room");
lblroomname.reshape(insets().left+5,insets().top+50,60,20);
add(lblroomname);
txtroomname=new TextField();
txtroomname.reshape(insets().left+75,insets().top+50,60,20);
add(txtroomname);
okBtn=new Button("Login");
okBtn.reshape(insets().left+25,insets().top+80,60,20);
add(okBtn);
// okBtn.addActionListener(this);
exitBut=new Button("EXIT");
exitBut.reshape(insets().left+50,insets().top+80,60,20);
add(exitBut);
// exitBut.addActionListener(this);
public static void main(String[] args)
// Create a JFrame
JFrame frame = new JFrame("client side");
// Create a outer class object
outer outerobj = new outer();
// Add the outer to the JFrame
frame.getContentPane().add(outerobj, BorderLayout.WEST);
// Set Jframe size
frame.setSize(800, 400);
//set resizable true
frame.setResizable(true);
// Set JFrame to visible
frame.setVisible(true);
// set the close operation so that the Application terminates when closed
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
when i compile it it compiles but gives run time error like this
RUN TIME error:
Exception in thread "main" java.lang.IllegalArgumentException: adding a window
to a container
at java.awt.Container.addImpl(Container.java:434)
at java.awt.Container.add(Container.java:345)
at outer.main(outer.java:75)
Press any key to continue...
i know erroe in this line
frame.getContentPane().add(outerobj, BorderLayout.WEST);
but how shall i add to get the proper layout by getting benifit of insets method
reply soon
please

Answer 1

You can't add a frame to a frame.
Try chaing the class definition from
public class outer extends Frameto
public class outer extends PanelPlease note to format your code (you'll get a faster response) use [ code]
Object names should always start with a capital letter. outer --> Outer