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Add Buttons to ToolBar

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.ToolBar; import org.eclipse.swt.widgets.ToolItem; public class ToolBarButtonsAdding {   public static void main(String[] args) {     Display display = new Display();     final Shell shell = new Shell(display);     GridLayout gridLayout = new GridLayout();     gridLayout.numColumns = 3;     shell.setLayout(gridLayout);     ToolBar toolbar = new ToolBar(shell, SWT.NONE);     ToolItem itemBack = new ToolItem(toolbar, SWT.PUSH);     itemBack.setText("Back");     ToolItem itemForward = new ToolItem(toolbar, SWT.PUSH);     itemForward.setText("Forward");     ToolItem itemStop = new ToolItem(toolbar, SWT.PUSH);     itemStop.setText("Stop");     ToolItem itemRefresh = new ToolItem(toolbar, SWT.PUSH);     itemRefresh.setText("Refresh");     ToolItem itemGo = new ToolItem(toolbar, SWT.PUSH);     itemGo.setText("Go");     GridData data = new GridData();     data.horizontalSpan = 3;     toolbar.setLayoutData(data);     Listener listener = new Listener() {       public void handleEvent(Event event) {         ToolItem item = (ToolItem) event.widget;         String string = item.getText();         if (string.equals("Back"))           System.out.println("Back");         else if (string.equals("Forward"))           System.out.println("Forward");         else if (string.equals("Stop"))           System.out.println("Stop");         else if (string.equals("Refresh"))           System.out.println("Refresh");         else if (string.equals("Go"))           System.out.println("Go");       }     };     itemBack.addListener(SWT.Selection, listener);     itemForward.addListener(SWT.Selection, listener);     itemStop.addListener(SWT.Selection, listener);     itemRefresh.addListener(SWT.Selection, listener);     itemGo.addListener(SWT.Selection, listener);     shell.open();     while (!shell.isDisposed()) {       if (!display.readAndDispatch())         display.sleep();     }     display.dispose();   } }