Examples of java.awt.Component

java.awt.Component
, now aButton has a listener with a reference // to bigOne! aButton.addActionListener(this); } public void actionPerformed(ActionEvent e) { System.out.println("Hello There"); } } In this example, serializing aButton by itself will cause MyApp and everything it refers to to be serialized as well. The problem is that the listener is serializable by coincidence, not by design. To separate the decisions about MyApp and the ActionListener being serializable one can use a nested class, as in the following example:
```
 import java.awt.*; import java.awt.event.*; import java.io.Serializable; class MyApp java.io.Serializable { BigObjectThatShouldNotBeSerializedWithAButton bigOne; Button aButton = new Button(); static class MyActionListener implements ActionListener { public void actionPerformed(ActionEvent e) { System.out.println("Hello There"); } } MyApp() { aButton.addActionListener(new MyActionListener()); } } 
```
Note: For more information on the paint mechanisms utilitized by AWT and Swing, including information on how to write the most efficient painting code, see Painting in AWT and Swing.
For details on the focus subsystem, see How to Use the Focus Subsystem, a section in The Java Tutorial, and the Focus Specification for more information. @version 1.451, 07/29/09 @author Arthur van Hoff @author Sami Shaio

            defaultForegroundColor = getForeground();
        }


        public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected,
                                                      boolean cellHasFocus) {
            Component component = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);


            setIcon(null);  //just remove the icon entirely


            boolean isAllowed = isAllowed((String) value);

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            component.setAlignmentX(ba.getAlignmentX());
            component.setAlignmentY(ba.getAlignmentY());
            anchor = null;
          }
        } else {
          Component comp = (Component) childWidget.getWidget();


          if (comp != null && comp instanceof JComponent) {
            JComponent component = (JComponent) comp;


            component.setAlignmentX(0.0f);

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    super(parent, name);
    panel = new JPanel(new BorderLayout());
  }
  
  public void addChild(Widget widget, Object constraint) throws GUIException {
    Component component = widget.getWidget();
    if (constraint == null)
      constraint = BorderLayout.CENTER;
    panel.add(component, constraint);
    addChild(widget);
  }

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      for (int i=0; i<widgets.size(); i++) {
        WeakReference ref = (WeakReference) widgets.get(i);
        Widget referent = (Widget) ref.get();
        
        if (referent != null) {
          Component component = referent.getWidget();
          if (component != null)
            SwingUtilities.updateComponentTreeUI(component);
        }
      }
    }

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            if (    !ignoreEdit && 
                    (e.getType() == TableModelEvent.INSERT || e.getType() == TableModelEvent.UPDATE)) {


                int row = getSelectedRow();


                Component component = null;


                try {
                    component = getEditorComponent();
                } catch (Exception ignore) {}


                if (component == null) {
                    addRowToCache(row, e.getColumn());
                } else {
                    int field = getFieldForColumnIndex(e.getColumn());
                    try {
                        if (component.isEnabled() && !module.getField(field).isUiOnly())
                            addRowToCache(row, e.getColumn());
                    } catch (Exception whatever) {
                        addRowToCache(row, e.getColumn());
                    }
                }

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   * @param component the component for which the Window should be returned.
   * @return the AWT-Window that is the (possibly indirect) parent of this component.
   */
  protected static Window getWindowAncestor(final Component component)
  {
    Component parent = component.getParent();
    while (parent != null)
    {
      if (parent instanceof Window)
      {
        return (Window) parent;
      }
      parent = parent.getParent();
    }
    return null;
  }

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      final JComponent jc = (JComponent) c;
      jc.setDoubleBuffered(false);
      final Component[] childs = jc.getComponents();
      for (int i = 0; i < childs.length; i++)
      {
        final Component child = childs[i];
        prepareComponent(child);
      }
    }
  }

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     */
    public void run()
    {
      try
      {
        final Component component = getComponent();
        if (component instanceof Window)
        {
          final Window w = (Window) component;
          w.validate();
        }
        else if (isOwnPeerConnected())
        {
          final Window w = ComponentDrawable.getWindowAncestor(component);
          if (w != null)
          {
            w.validate();
          }
        }
        else
        {
          peerSupply.pack();
          contentPane.add(component);
        }


        component.setBounds
            ((int) area.getX(), (int) area.getY(),
                (int) area.getWidth(), (int) area.getHeight());
        component.validate();
        component.paint(graphics);
      }
      finally
      {
        cleanUp();
      }

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    public void run()
    {
      retval = null;
      try
      {
        final Component component = getComponent();
        if (component instanceof Window == false && isOwnPeerConnected() == false)
        {
          peerSupply.pack();
          contentPane.add(component);
          contentPane.validate();
          component.validate();
        }
        else if (isOwnPeerConnected())
        {
          retval = component.getSize();
          return;
        }
        else
        {
          component.validate();
        }
        retval = component.getPreferredSize();
      }
      finally
      {
        cleanUp();
      }

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    public void run()
    {
      retval = null;
      try
      {
        final Component component = getComponent();
        if (component instanceof Window == false && isOwnPeerConnected() == false)
        {
          peerSupply.pack();
          contentPane.add(component);
        }
        retval = component.getSize();
      }
      finally
      {
        cleanUp();
      }

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