import javax.swing.*;
import java.awt.*; 
import javax.swing.border.*;               // For the border classes

public class TryGridLayout
{
  // The window object
  static JFrame aWindow = new JFrame("This is a Grid Layout"); 

  public static void main(String[] args)
  {
    Toolkit theKit = aWindow.getToolkit();       // Get the window toolkit
    Dimension wndSize = theKit.getScreenSize();  // Get screen size

    // Set the 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(WindowConstants.DISPOSE_ON_CLOSE);

    GridLayout grid = new GridLayout(3,4,30,20);    // Create a layout manager
    Container content = aWindow.getContentPane();   // Get the content pane
    content. setLayout(grid);                       // Set the container layout mgr

    EtchedBorder edge = new EtchedBorder(EtchedBorder.RAISED);  // Button border   

    // Now add ten Button components
    JButton button;                                             // Stores a button
    for(int i = 1; i <= 10; i++)
    {
      content.add(button = new JButton("Press " + i));          // Add a Button 
      button.setBorder(edge);                                   // Set the border
    }
      
    aWindow.setVisible(true);                              // Display the window
  }
}