package espc;import javax.swing.*;import java.awt.*;/** * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2006</p> * <p>Company: </p> * @author not attributable * @version 1.0 */public class MainFrame extends JFrame {  JToolBar jToolBar1 = new JToolBar();  JButton jButton1 = new JButton();  public MainFrame() {    setSize(400,300);    setVisible(true);    try {      jbInit();    }    catch(Exception e) {      e.printStackTrace();    }  }  public static void main(String[] args) {    MainFrame mainFrame = new MainFrame();  }  private void jbInit() throws Exception {    this.setTitle("歡迎使用e質量控制系統");    jButton1.setText("測試");    this.getContentPane().add(jToolBar1, BorderLayout.NORTH);    jToolBar1.add(jButton1, null);  }}