SwingUtilities class of java

**Owen Fernandes** · 12-02-2010

Hello friend,

I am beginner to the advanced java programming. I need youe help to know about the 'SwingUtilities class' of java. I don't have any idea about it's use. I also want to know the methods as well as the constructors of the SwingUtilities class of java. If you posses sound knowledge about the SwingUtilities class of java, then please let me know that. It will be greatly appreciated if you give suitable example for SwingUtilities class.

**Praetor** · 12-02-2010

Hi,

The SwingUtilities class of java is basically implements all the interfaces from 'SwingConstants class'. This java class is taken from 'java.lang.Object' package. The SwingUtilities class of java is nothing but the collection of the swing utility methods. To sue the properties of this class you just need to use the 'javax.swing.SwingUtilities' package in you java program. The 'windowForComponent()' of SwingUtilities class is used for o return the component of window.

**Katty** · 12-02-2010

Refer following example of SwingUtilities class of java:

Code:

import javax.swing.SwingUtilities;
import javax.swing.JFrame;
public class Main extends JFrame
 {
  public Main()
 {
    this.setDefaultCloseOperation(JFrame.EXIT_CLOSE);
    this.setSize(500, 200);
    this.setLayout(new FlowLayout(FlowLayout.LEFT));
    JButton button1 = new JButton("Change Color");
    button1.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        Component component4 = (Component) e.getSource();
        JFrame frame3 = (JFrame) SwingUtilities.getRoot(component4);
        frame3.setBackground(Color.BLUE);
      }
    });
    this.getContentPane().add(button);
  }
  public static void main(String[] ars) {
    new Main().setVisible(true);
  }
}

**kelfro** · 12-02-2010

Hello friend,

The there are lots of method of SwingUtilities class are available, some of them are mentioned below:

updateComponentTreeUI(Component cmp)
replaceUIInputMap(JComponent comp, int typeOf cmp, InputMap uiInputMap)
processKeyBindings(KeyEvent evn)
paintComponent(Graphics gr, Component cmp, Container pr, Rectangle rc)
notifyAction(Action ac, KeyStroke kys, KeyEvent evn, Object sender, int modifiers)

**Zecho** · 12-02-2010

If you want to know how to use the methods of SwingUtilities class, then I suggest you to refer following given java code:

Code:

Runnable run1 = new Runnable()
{

public void run1()
{

selectAllInEditor();

}

};

SwingUtilities.invokeLater(run);// methos of SwingUtilities class

}

protected void removeEditor()
	
{
                ...
	if (scrollPane != null)

	{    
		scrollPane = null;
		scrollPane.setVisible(false);
		
}

**Reegan** · 12-02-2010

Hi friend, Below I have mentioned the two important methods of SwingUtilities class:

* convertPoint(Component src, int x1, int y1, Component dstn) : This method of SwingUtilities is basically used for the conversion of point (x1,1y) into destination coordinate system.

* convertPoint(Component src, Point pt, Component dstn): This method of SwingUtilities is basically used for the conversion of 'pt' into destination coordinate system.