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GridLayout 2x2

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.Shell; public class GridLayout2x2 {   public static void main(String[] args) {     Display display = new Display();     Shell shell = new Shell(display);     GridLayout layout = new GridLayout();     layout.numColumns = 2;     layout.makeColumnsEqualWidth = true;     shell.setLayout(layout);     GridData data = new GridData(GridData.FILL_BOTH);     Button one = new Button(shell, SWT.PUSH);     one.setText("one");     one.setLayoutData(data);     data = new GridData(GridData.FILL_BOTH);     Button two = new Button(shell, SWT.PUSH);     two.setText("two");     two.setLayoutData(data);     data = new GridData(GridData.FILL_BOTH);     Button three = new Button(shell, SWT.PUSH);     three.setText("three");     three.setLayoutData(data);     data = new GridData(GridData.FILL_BOTH);     Button four = new Button(shell, SWT.PUSH);     four.setText("four");     four.setLayoutData(data);     shell.pack();     shell.open();     while (!shell.isDisposed()) {       if (!display.readAndDispatch()) {         display.sleep();       }     }     display.dispose();   } }