Urgent please help(program to kill running process)

Question

I am trying to execute "alter system kill session '9,32'" from my java program.But the query doesn't seem to get executed.
please help me.
Here is my code.....
package package6;
import java.sql.*;
public class killProcess{
public static void createTable() {
Connection con=null;
Statement st;
try{
String alterSql = "alter system kill session '9,32'";
st = con.createStatement();
st.executeQuery(alterSql);
}catch(SQLException sql){
System.out.println("SQLException se"+sql);
public static Connection getConnection() throws SQLException{
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}catch(ClassNotFoundException e){
System.out.println("Class Not Found Exception");
Connection con =DriverManager.getConnection("jdbc:odbc:abc","system","manager");
return con;
public static void main(String args[]){
dbconn2.createTable();

Answer 1

There is a lot of principial mistakes in youp example (I hope it just an example)
1. Never use a sun.jdbc.odbc.JdbcOdbcDriver in serious application - it is a lot of problems in this bridge. It can be used in tutorials only. You should use JDBC-diver from a manufacturer of your DB (http://industry.java.sun.com/products/jdbc/drivers)
2. NEVER create a staic variables for obtaining a connection - connection is a complicated object with limited lifetime. Connection should be obtained from a spesial pool or DataSource. See http://developer.java.sun.com/developer/technicalArticles/J2EE/pooling/ if you use enterprise-java or http://developer.java.sun.com/developer/onlineTraining/Programming/JDCBook/conpool.html for single application (but this is a tutorial only - the code is not work - contact me for obtaining a corrected code)
3. This code is ungrammatical
try{
String sql="alter system kill session '?,?'";
PreparedStatement ps = con.prepareStatement(sql);
}catch(SQLException sql){
System.out.println("SQLException se"+sql);
you should write at least:
String sql="alter system kill session '?,?'";
Connection con = null;
PreparedStatement ps = null;
try{
con = getConnection();
ps = con.prepareStatement(sql);
}catch(SQLException e){
System.out.println("SQLException se"+e);
e.printStackTrace();
}finally{
try{
if(ps!=null)
ps.close();
}catch(Throwable ee){
ee.printStackTrace()
try{
con.close();
}catch(Throwable ee){
ee.printStackTrace()
And whot are you mean in command "alter system kill session '?,?'"
Whot is it '?,?' - may be '?','?'?
You should check syntax of your SQL-instruction.
but your problem is not in Java -
May be syntax of the SQL-command
May be you should use CallableStatement extends of PreparedStatement
It can depend on DataDase.
And don't forget to commin your connection.