How to use

centerComponentInWindow

method

in

org.apache.jorphan.gui.ComponentUtil

/**
 * Use this static method if you want to center and set its position
 * compared to the size of the current users screen size. Valid percent is
 * between +-(0-100) minus is treated as plus, bigger than 100 is always set
 * to 100.
 *
 * @param component
 *            the component you want to center and set size on
 * @param percentOfScreen
 *            the percent of the current screensize you want the component
 *            to be
 */
public static void centerComponentInWindow(Component component, int percentOfScreen) {
  if (percentOfScreen < 0) {
    centerComponentInWindow(component, -percentOfScreen);
    return;
  }
  if (percentOfScreen > 100) {
    centerComponentInWindow(component, 100);
    return;
  }
  double percent = percentOfScreen / 100.d;
  Rectangle bounds = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration().getBounds();
  component.setSize((int) (bounds.getWidth() * percent), (int) (bounds.getHeight() * percent));
  centerComponentInWindow(component);
}

/**
 * @return {@link JDialog} Help window and initializes it if necessary
 */
private static JDialog initHelpWindow() {
  if (helpWindow == null) {
    helpWindow = new EscapeDialog(new Frame(),// independent frame to
                        // allow it to be overlaid
                        // by the main frame
        JMeterUtils.getResString("help"),//$NON-NLS-1$
        false);
    helpWindow.getContentPane().setLayout(new GridLayout(1, 1));
    helpWindow.getContentPane().removeAll();
    helpWindow.getContentPane().add(scroller);
    ComponentUtil.centerComponentInWindow(helpWindow, 60);
  }
  return helpWindow;
}

ComponentUtil.centerComponentInWindow(this);

private void init() { // WARNING: called from ctor so must not be overridden (i.e. must be private or final)
  templateList.setValues(TemplateManager.getInstance().getTemplateNames());            
  templateList.addChangeListener(this);
  reloadTemplateButton.addActionListener(this);
  reloadTemplateButton.setFont(FONT_SMALL);
  this.getContentPane().setLayout(new BorderLayout(10, 0));
  
  JPanel templateBar = new JPanel(new BorderLayout());
  templateBar.add(templateList, BorderLayout.CENTER);
  JPanel reloadBtnBar = new JPanel();
  reloadBtnBar.add(reloadTemplateButton);
  templateBar.add(reloadBtnBar, BorderLayout.EAST);
  this.getContentPane().add(templateBar, BorderLayout.NORTH);
  helpDoc.setContentType("text/html"); //$NON-NLS-1$
  helpDoc.setEditable(false);
  helpDoc.addHyperlinkListener(this);
  this.getContentPane().add(scroller, BorderLayout.CENTER);
  applyTemplateButton.addActionListener(this);
  cancelButton.addActionListener(this);
  // Bottom buttons bar
  JPanel actionBtnBar = new JPanel(new FlowLayout());
  actionBtnBar.add(applyTemplateButton);
  actionBtnBar.add(cancelButton);
  this.getContentPane().add(actionBtnBar, BorderLayout.SOUTH);
  this.pack();
  this.setMinimumSize(new Dimension(MINIMAL_BOX_WIDTH, MINIMAL_BOX_HEIGHT));
  ComponentUtil.centerComponentInWindow(this, 50); // center position and 50% of screen size
  populateTemplatePage();
}

ComponentUtil.centerComponentInWindow(this);

ComponentUtil.centerComponentInWindow(this);

MainFrame main = new MainFrame(treeModel, treeLis);
splash.setProgress(100);
ComponentUtil.centerComponentInWindow(main, 80);
main.setLocationRelativeTo(splash);
main.setVisible(true);