Java SWT FillLayout Tutorial

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1- FillLayout
2- FillLayout Example

1- FillLayout

FillLayout is the simplest layout class. It lays out controls in a single row or column, forcing them to be the same size.
Horizontal FillLayout:
Vertical FillLayout: 
//  Create a Horizontal FillLayout.
FillLayout fillLayout= new FillLayout(SWT.HORIZONTAL);

// Set Layout for component
component.setLayout(fillLayout);


// Create a Vertical FillLayout.
FillLayout fillLayout= new FillLayout(SWT.VERTICAL);

// Set Layout for component
component.setLayout(fillLayout);
margin & spacing 
FillLayout fillLayout= new FillLayout(SWT.HORIZONTAL);
fillLayout.marginHeight= 20;
fillLayout.marginWidth= 20;
fillLayout.spacing=15;

2- FillLayout Example

Horizontal FillLayout example:
HorizontalFillLayoutDemo.java 
package org.o7planning.swt.filllayout;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class HorizontalFillLayoutDemo {


  public static void main(String[] args) {

      Display display = new Display();
      Shell shell = new Shell(display);
      shell.setText("SWT FillLayout (o7planning.org)");

      //  Create a Horizontal FillLayout.
      FillLayout fillLayout= new FillLayout(SWT.HORIZONTAL);
      shell.setLayout(fillLayout);
   
      Button button1=  new Button(shell, SWT.NONE);
      button1.setText("Button 1");
 
      Button button2=  new Button(shell, SWT.NONE);
      button2.setText("Button 2");
   
      Button button3=  new Button(shell, SWT.NONE);
      button3.setText("Button 3");

      shell.setSize(400, 250);
      shell.open();
      while (!shell.isDisposed()) {
          if (!display.readAndDispatch())
              display.sleep();
      }
      display.dispose();
  }

}
Horizontal FillLayout with margin & spacing:
HorizontalFillLayoutDemo2.java 
package org.o7planning.swt.filllayout;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class HorizontalFillLayoutDemo2 {
   
   
    public static void main(String[] args) {

        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("SWT FillLayout (o7planning.org)");
   
        FillLayout fillLayout= new FillLayout(SWT.HORIZONTAL);
        fillLayout.marginHeight= 20;
        fillLayout.marginWidth= 20;
        fillLayout.spacing=15;
       
        shell.setLayout(fillLayout);
       
        Button button1=  new Button(shell, SWT.NONE);
        button1.setText("Button 1");
     
        Button button2=  new Button(shell, SWT.NONE);
        button2.setText("Button 2");
       
        Button button3=  new Button(shell, SWT.NONE);
        button3.setText("Button 3");

        shell.setSize(400, 250);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }

}

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