JAVA求助

public void jButton1_actionPerformed(ActionEvent e) {

try {
//Connection con = connectionBao.getConnection();
Sjklj con = new Sjklj();
String user = jTextField1.getText();//获取 登陆名
String password= jTextField2.getText();//获取密码
Frame2 gz = new Frame2(); //登陆成功将弹出下一个界面
Statement s = con.getCon().createStatement();
int num=0;//★
ResultSet rs = s.executeQuery("select * from admin_user");
while(rs.next()){
if ((user.equals(rs.getString(2))) &&
(password.equals(rs.getString(3)))) {
num=1;//★
break;
}
}
if(num==1){//★
gz.show();
gz.setSize(new Dimension(800, 640));
this.dispose();
}else{
JOptionPane.showMessageDialog(null, "非法用户", "提示!",JOptionPane.E

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