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Using GridData Objects

The GridData class is the layout data associated with the GridLayout class. Horizontal Alignment and Vertical Alignment. Specify how a control is positioned horizontally and vertically in a cell. Several possible values for horizontalAlignment are as follows: BEGINNING: Left-aligned (the default value) CENTER: Center-aligned END: Right-aligned FILL: Filling all the available horizontal space import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.List; import org.eclipse.swt.widgets.Shell; public class GridLayoutAlignmentHoriVerical {   public static void main(String[] args) {     Display display = new Display();     final Shell shell = new Shell(display);     GridLayout gridLayout = new GridLayout();     gridLayout.numColumns = 2;     gridLayout.makeColumnsEqualWidth = true;          shell.setLayout(gridLayout);     Button button1 = new Button(shell, SWT.PUSH);     button1.setText("button1"); // Default alignment     List list = new List(shell, SWT.BORDER);     list.add("item 1");     list.add("item 2");     list.add("item 3");     list.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_CENTER));     Button button2 = new Button(shell, SWT.PUSH);     button2.setText("button #2");     button2.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_END));     Button button3 = new Button(shell, SWT.PUSH);     button3.setText("3");     button3.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));          shell.setSize(450, 400);     shell.open();     while (!shell.isDisposed()) {       if (!display.readAndDispatch()) {         display.sleep();       }     }     display.dispose();   } }