Layout Managers

ironchef · October 16th, 2006, 06:13 AM

I've just started to work with windows and every time i try to add simple buttons using a layout manager(so far i have only flow and border layout), I keep getting the same error massages. I'm using the code below for my border layout and the error massages:

import javax.swing.JFrame;
import javax.swing.JButton;

import javax.swing.border.EtchedBorder;

import java.awt.Toolkit;
import java.awt.Dimension;
import java.awt.Container;
import java.awt.BorderLayout;

public class BorderLayout {
//window object
static JFrame aWindow = new JFrame("Border Layout");

public static void main(String[] args) {
  Toolkit theKit = aWindow.getToolkit();
  Dimension wndSize = theKit.getScreenSize();

  //set position to screen center & size to half screen size
  aWindow.setBounds(wndSize.width/4, wndSize.height/4, //position
            wndSize.width/2, wndSize.height/2); //size
  aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CL OSE);

  BorderLayout border = new BorderLayout();
  Container content = aWindow.getContentPane();
  content.setLayout(new BorderLayout());
  EtchedBorder edge = new EtchedBorder(EtchedBorder.RAISED);
  //add 5 JButtons and set their borders
  JButton button;
  content.add(button = new JButton("EAST"), BorderLayout.EAST);
  button.setBorder(edge);
  content.add(button = new JButton("WEST"), BorderLayout.WEST);
  button.setBorder(edge);
  content.add(button = new JButton("NORTH"), BorderLayout.NORTH);
  button.setBorder(edge);
  content.add(button = new JButton("SOUTH"), BorderLayout.SOUTH);
  button.setBorder(edge);
  content.add(button = new JButton("CENTER"), BorderLayout.CENTER);
  button.setBorder(edge);

  aWindow.setVisible(true);
}
}

error messages:

BorderLayout.java:9: BorderLayout is already defined in this compilation unit
import java.awt.BorderLayout;
^
BorderLayout.java:25: setLayout(java.awt.LayoutManager) in java.awt.Container cannot be applied to (BorderLayout)
content.setLayout(border);
          ^

others that dont matter as much.....

IronChef - http://www.freewebs.com/cool_recipes

annienell · October 20th, 2006, 05:09 AM

Hi, IronChef!
the problem is that the class you have written has the same name with the one you import.
you named your class "BorderLayout" and also imported the class with the same name

(java.awt.BorderLayout).
I guess the compiler mixes that things
I can suggest you to change the name of your class to something like "Borders".
I did it on my machine and that worked well for me.
Cheers,
Ann