java - Invalid Column Index -

below part of code. keep getting errors database part. i've looked them multiple places , can't seem find answer. suggestions? code , what's printed errors shown below!

public void deleteemployee() {     string sqlquery;     sqlquery = "delete javauser.employee";     system.out.println(sqlquery);     senddbcommand(sqlquery);     }  public void deleteaccident() {     string sqlquery;     sqlquery = "delete javauser.accident";     system.out.println(sqlquery);     senddbcommand(sqlquery); }   public void deletetruck() {     string sqlquery;     sqlquery = "delete javauser.truck";     system.out.println(sqlquery);     senddbcommand(sqlquery); }  public void deletehomestate() {     string sqlquery;     sqlquery = "delete javauser.homestate";     system.out.println(sqlquery);     senddbcommand(sqlquery); }  public void deletecountry() {     string sqlquery;     sqlquery = "delete javauser.country";     system.out.println(sqlquery);     senddbcommand(sqlquery); } 

here errors keep popping up:

run: delete javauser.homestate java.sql.sqlexception: ora-01002: fetch out of sequence  delete javauser.country java.sql.sqlexception: ora-01002: fetch out of sequence  delete javauser.truck java.sql.sqlexception: ora-01002: fetch out of sequence  delete javauser.accident java.sql.sqlexception: ora-01002: fetch out of sequence  delete javauser.employee java.sql.sqlexception: ora-01002: fetch out of sequence 

also, call delete methods in order when program presses "insert button"

how can rid of these error messages?

here's senddbcommand:

public static void senddbcommand(string sqlquery) {     string jdbcconnectionurl = "jdbc:oracle:thin:@localhost:1521:xe";     string userid = "javauser";     string userpass = "javapass";      try     {         connection conn = getdbconnection(jdbcconnectionurl, userid, userpass);         stmt = conn.createstatement(resultset.type_scroll_sensitive,                  resultset.concur_read_only);         rset = stmt.executequery(sqlquery);          int traverse = 0;         while (rset.next())         {             system.out.println(rset.getstring(1) + " " + rset.getstring(2));         }     }     catch (sqlexception e)     {         system.out.println(e.tostring());     } }  

you should include counter , print result, maybe should have clue, , well, delete there no resultset should executeupdate instead.