netbeans!!!

[saeedprz]

دوستان من تو نت بینز جدیدم و فقط به خاطر gui خوبش واردش شدم ولی ساده ترین چیزا نظیر اینرو ایراد میگیره


public boolean query_on_DB( String _query )
{
try
{
stmt= conn.createStatement();
resSet = stmt.executeQuery( _query );
if(resSet.next())
{
return true;
}
else
{
JOptionPane.showMessageDialog(null, "nothing! ");
return false;
}

} catch (Exception e)
{
JOptionPane.showMessageDialog(null, "can not execut query! ");
return false;
}
}


/**
* Creates new form main
*/
public main() {
initComponents();
}


/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {


jPanel1 = new javax.swing.JPanel();
jPanel2 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
txtUserName = new javax.swing.JTextField();
txtPassword = new javax.swing.JPasswordField();
jLabel2 = new javax.swing.JLabel();
jLabel1 = new javax.swing.JLabel();


setDefaultCloseOperation(javax.swing.WindowConstan ts.EXIT_ON_CLOSE);


jPanel2.setBorder(javax.swing.BorderFactory.create TitledBorder(null, "Login", javax.swing.border.TitledBorder.CENTER, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Tahoma", 0, 18), new java.awt.Color(51, 51, 255))); // NOI18N


jButton1.setText("Login");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});


jLabel2.setText("password ->");


jLabel1.setText("username ->");


javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.Grou pLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel2Layout.createParallelGroup(javax. swing.GroupLayout.Alignment.TRAILING)
.addComponent(jButton1)
.addGroup(jPanel2Layout.createParallelGroup(javax. swing.GroupLayout.Alignment.LEADING, false)
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(jLabel2)
.addGap(18, 18, 18)
.addComponent(txtPassword))
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(jLabel1)
.addGap(18, 18, 18)
.addComponent(txtUserName, javax.swing.GroupLayout.PREFERRED_SIZE, 145, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addContainerGap())
);
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.Grou pLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel2Layout.createParallelGroup(javax. swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(txtUserName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.Component Placement.UNRELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax. swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(txtPassword, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addComponent(jButton1)
.addContainerGap())
);


javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.Grou pLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILI NG, jPanel1Layout.createSequentialGroup()
.addContainerGap(267, Short.MAX_VALUE)
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.Grou pLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(235, Short.MAX_VALUE))
);


javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout .Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout .Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);


pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String uName = txtUserName.getText();
String uPass = txtPassword.getText();

String sql = "select * from users where user_uname='"+uName+"'"+ "and user_upass='"+uPass+"'";


if(connect_to_DB())
{
if(query_on_DB(sql))
{
JOptionPane.showMessageDialog(null, "OK!");
}
else
{
JOptionPane.showMessageDialog(null, "incorrect info!");
}
}


مثلا .next چرا نمیشناسه چیز به این سادگیو تو netbeans
و چرا باید result باید cast بشه عین همین تو eclips هسج مشکلی نداره

ممنون میشم راه نمایی کنید