Java Error In comapitable Type in statement

Here I want to Check wheter entered id is already Exists in Database or Not
with Access Database,
Plz Help Me Sir
import java.io.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.sql.*;
import java.util.*;
class faculty3
{
JFrame j;
JPanel j1,j2,j3;
JTabbedPane tp;
JLabel l1,l2,l3,l4,l5,l6,l7,l8,l9;
JTextField t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12;
JButton addbtn,editbtn,resbtn,delbtn,savebtn; //Buttons
Connection con;
PreparedStatement st;
//Statement st;
faculty3() //constructor
{
j=new JFrame("faculty");
j1=new JPanel(new GridLayout(6,3));
j2=new JPanel(new GridLayout(5,2));
j3=new JPanel(new GridLayout(3,2));
tp=new JTabbedPane();
l1=new JLabel(" id");
l2=new JLabel("name");
l3=new JLabel("qualification");
l4=new JLabel("department"); //for panel j1
l5=new JLabel("id");
l6=new JLabel("name");
l7=new JLabel("qualification");
l8=new JLabel("department"); //for panel j2
l9=new JLabel("Enter the id"); //for panel j3
t1=new JTextField(20);
t1=new JTextField(20);
t2=new JTextField(20);
t3=new JTextField(20);
t4=new JTextField(20);
t5=new JTextField(20);
t6=new JTextField(20);
t7=new JTextField(20);
t8=new JTextField(20);
t9=new JTextField(20);
addbtn=new JButton("Add");
resbtn=new JButton ("Reset");
editbtn=new JButton("Edit");
savebtn=new JButton("Save");
delbtn=new JButton("Delete");
j1.add(l1);
j1.add(t1);
j1.add(l2);
j1.add(t2);
j1.add(l3);
j1.add(t3);
j1.add(l4);
j1.add(t4);
j1.add(addbtn);
j1.add(resbtn); //complete the j1 panel
j2.add(l5);
j2.add(t5);
j2.add(l6);
j2.add(t6);
j2.add(l7);
j2.add(t7);
j2.add(l8);
j2.add(t8);
j2.add(editbtn); //for Edit purpose
j2.add(savebtn); //for save the edit effect
j3.add(l9);
j3.add(t9);
j3.add(delbtn); //for j3 pan
//complete the reset action

addbtn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
//String v1=t1.getText();
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con =DriverManager.getConnection("jdbc:odbc:mydsn","","");
try
{
PreparedStatement st = con.createStatement();

int ide;//=Integer.parseInt(v1);
ResultSet rs=st.executeQuery("select id from faculty where id like '"+'%'+ide+'%'+"'");
if(rs.next())
{
JOptionPane.showMessageDialog(null,"Already Exists");
}
}//end try
catch(Exception e)
{
JOptionPane.showMessageDialog(j1,"Error in submitting data!");
}//end catch
}// end Action Performed
});//end Action Listener
}
void dis()
{
j.getContentPane().add(tp);
tp.addTab("Additional record",j1);
tp.addTab("Edit the record",j2);
tp.addTab("Deletion the Record",j3);
j.setSize(400,380);
j.setVisible(true);
j.setResizable(true);
}//end display method
public static void main(String args[])
{
faculty3 f=new faculty3();
f.dis();
}// end main method
}//end Class