package bar;import java.awt.*;import javax.swing.*;import java.sql.*;/** * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2003</p> * <p>Company: </p> * @author not attributable * @version 1.0 */public class cardMoneyPanel extends JPanel {  JLabel jLabel1 = new JLabel();  JLabel jLabel2 = new JLabel();  JLabel jLabel3 = new JLabel();  JLabel jLabel4 = new JLabel();  public cardMoneyPanel(mainFrame mFrame1,int ID) {    try {      Frame1 = mFrame1;      CardID = ID;      jbInit();    }    catch(Exception ex) {      ex.printStackTrace();    }  }  void jbInit() throws Exception {    this.setLayout(null);    jLabel1.setFont(new java.awt.Font("Serif", 0, 16));    jLabel1.setText("卡號：");    jLabel1.setBounds(new Rectangle(100, 75, 60, 30));    jLabel2.setText(Integer.toString(CardID));    jLabel2.setBounds(new Rectangle(180, 75, 90, 30));    jLabel3.setFont(new java.awt.Font("Serif", 0, 16));    jLabel3.setText("余額：");    jLabel3.setBounds(new Rectangle(100, 135, 60, 30));    jLabel4.setBounds(new Rectangle(180, 135, 90, 30));    this.add(jLabel1, null);    this.add(jLabel2, null);    this.add(jLabel3, null);    this.add(jLabel4, null);    //Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");    //String url = "jdbc:microsoft:sqlserver://keweixing:1433;DatabaseName=dbbar";    //String username = "sa";    //String password = "";    con = barConnect.getconn();    Statement stmt = con.createStatement();    ResultSet rs = stmt.executeQuery("select LeaveMoney from Card where CardID ="+CardID);    rs.next();    jLabel4.setText(rs.getString("LeaveMoney"));    con.close();    Frame1.login_false();    Frame1.SetCardID(0);  }  private mainFrame Frame1;  private Connection con;  private int CardID;}