SWT Java Tutorial

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  4. Start with the upper-left button, attach the top and left edges to the window, offsetting by five pixels
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class FormLayoutFormAttachmentSetButton {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    FormLayout layout = new FormLayout();
    layout.marginHeight = 5;
    layout.marginWidth = 10;
    shell.setLayout(layout);
    Button one = new Button(shell, SWT.PUSH);
    one.setText("One");
    FormData data = new FormData();
    data.top = new FormAttachment(0, 5);
    data.left = new FormAttachment(0, 5);
    data.bottom = new FormAttachment(50, -5);
    data.right = new FormAttachment(50, -5);
    one.setLayoutData(data);    
    
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
    display.dispose();
  }
}