这个写的算不算application.怎么显示啊
package test;
import java.awt.*;
import javax.swing.*;
/**
* <p>Title: annunciator javabean</p>
* <p>Description: 报警器</p>
* <p>Copyright: Copyright (c) 2003</p>
* <p>Company: cstsoft.com</p>
* @author teedywang
* @version 1.0
*/
public class test {
boolean packFrame = false;
JMenuBar jMenuBar1 = new JMenuBar();
//Construct the application
public test() {
Frame1 frame = new Frame1();
//Validate frames that have preset sizes
//Pack frames that have useful preferred size info, e.g. from their layout
if (packFrame) {
frame.pack();
}
else {
frame.validate();
}
//Center the window
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = frame.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
frame.setVisible(true);
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
//Main method
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch(Exception e) {
e.printStackTrace();
}
new test();
}
private void jbInit() throws Exception {
}
}
我觉得这个就是个application啊,但我不知道,怎么能看看它写出来的效果,我点了jbulilder的运行,出来的frame,上什么都没有,怎么回事