jdbc - How it works; "executeUpdate()"? -

i new jdbc , testing purpose passed select queries in executeupdate() instead of dml queries; , result got, made me confused.

i tested on scott user's tables of oracle 11g.

for dept , salgrade table returns integer no. 4 , 5 no. of records in these tables think. , emp table should return 14, returned 10; why ?

my code is:

import java.sql.*;  public class jdbctest2 {  public static void main(string args[])throws exception     {         class.forname("oracle.jdbc.oracledriver");          connection con = drivermanager.getconnection("jdbc:oracle:thin:@localhost:1521:orcl","scott","tiger");          statement st=con.createstatement();          system.out.println(st.executeupdate("select * dept"));         system.out.println(st.executeupdate("select * salgrade"));         system.out.println(st.executeupdate("select * emp"));          st.close();         con.close();      } } 

i know executeupdate() not meant select queries; happening here please explain me , let me come out confusion.thank you