求教怎么把一个简单的显示HelloWorld的窗体打包成为一个可执行的Jar文件?
程序的代码如下:
import javax.swing.*;
import java.awt.*;
class MainFrame extends JFrame
{
public MainFrame()
{
setSize(WIDTH,HEIGHT);
setTitle("NoNameFrame");
HelloPanel panel=new HelloPanel();
Container contentPane=getContentPane();
contentPane.add(panel);
}
public static final int WIDTH=300;
public static final int HEIGHT=200;
}
class HelloPanel extends JPanel
{
public void paintComponent(Graphics g)
{
super.paintComponent(g);
g.drawString("Hello,World",75,100);
}
}
public class HelloWorld
{
public static void main(String [] args)
{
MainFrame frame=new MainFrame();
frame.setDefaultCloseOperation(3);
frame.show();
}
}
是否要加如例如package test;这样的语句才可以,或者是环境变量中要指定jre的路径?