sql - Exception generated when updating table - java -


the following code works - table updated (confirmed on sql server looking @ table contents before , after code executed).

but, when run program in netbeans , command line, exception caught catch block "rs = stmt.executequery(sqlquery);" executed.

i know because line "system.out.println("updated successfully!");" before catch block never executed. nor executed if move after "rs = stmt.executequery(sqlquery);".

the exception error is:

run: statement did not return result set. build successful (total time: 0 seconds)

i can't understand have done wrong.

i did try using "rs = stmt.executeupdate(sqlquery);" instead of "rs = stmt.executequery(sqlquery);", netbeans has red exclamation mark note when hover on it:

incompatible types     required: resultset     found: int

and if compile it, netbeans spits out:

c:\java\example\src\example\example.java:56: error: incompatible types             rs = stmt.executeupdate(sqlquery);                                    ^   required: resultset   found:    int 1 error

grrr. i'm going nuts! please help!

package example;  import java.io.bufferedreader; import java.io.filereader; import java.io.filewriter; import java.io.printwriter;  import java.sql.connection; import java.sql.drivermanager; import java.sql.resultset; import java.sql.sqlexception; import java.sql.statement;  class example {     public static void main(string args[])     {         string host = "jdbc:sqlserver://server1\\primrose;databasename=primrose";         string uname = "sa";         string upwd = "pr1m@f@ct";          string sqlquery = "";          int totalfolders = 4;          int getrecid = 0;         string getuser = "";         string getsection = "";         string getkey = "";         string getvalue = "";         string getextrainfo = "";          try         {             connection con = drivermanager.getconnection(host, uname, upwd);             statement stmt = con.createstatement();              sqlquery = "select * _registry (section = 'recids' , key_ = '_folders' , user_ = 'sc_general')";              resultset rs = stmt.executequery(sqlquery);              while (rs.next())             {                 getrecid = rs.getint("recid");                 getuser = rs.getstring("user_");                 getsection = rs.getstring("section");                 getkey = rs.getstring("key_");                 getvalue = rs.getstring("value");                 getextrainfo = rs.getstring("extrainfo");                  getvalue = getvalue.trim();                         // strip trailing spaces string                 int newvalue = integer.parseint(getvalue) + 1;      // convert string number can add total folders                 newvalue = newvalue + totalfolders;                 // change total + existing value write db                 getvalue = integer.tostring(newvalue);              // convert string required table             }              sqlquery = "update _registry set value=" + getvalue + " (recid = 5 , user_ = 'sc_general' , section = 'recids' , key_ = '_folders')";              rs = stmt.executequery(sqlquery);              rs.updateint( "recid", getrecid );             rs.updatestring( "user_", getuser );             rs.updatestring( "section", getsection );             rs.updatestring( "key_", getkey );             rs.updatestring( "value", getvalue );             rs.updatestring( "extrainfo", getextrainfo );             rs.updaterow();              system.out.println("updated successfully!");         }          catch ( sqlexception err )           {            system.out.println( err.getmessage( ) );         }     } }

the function "stmt.executeupdate(sqlquery);" returns integer, because not retrieving data database. try this:

integer c = stmt.executeupdate(sqlquery);

the integer value indicates how many rows have been changed.


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