用Myeclipse怎么运行java swing

package
org.loon.chair.example1;
import
java.awt.*;
import
javax.swing.*;
public
class
Example1
extends
JPanel{
private
static
final
int
WIDTH
=
300;

private
static
final
int
HEIGHT
=
300;

public
Example1(){

setBackground(new
Color(255,255,255));

setPreferredSize(new
Dimension(WIDTH,
HEIGHT));

}

public
void
paintComponent(Graphics
g){

super.paintComponent(g);

g.drawString("Easy
Java",
40,
40);

} //要在这里加上一个main函数才可以运行这个程序。 public
static
void
main(String
[]
args){
JFrame
f
=
new
JFrame();

f.add(new
Example1());//注意这里，要把panel放到Frame上才可以显示出来。如果不理解，可以再问我

f.setSize(500,400);

f.setVisible(true);}}