JDBC Trouble when exception appears .

Hello,
I got some pb with this configuration database pgsql 7.1 and connect with
jdbc driver from 7.2

I notice something that could be a jdbc bugs :
when connection is not set to autocommit (setAutocommit(false))
When you catch an exception, the next requests until the next commit are
totaly ingored ex code :

import java.sql.*;
import java.io.*;

class TestJDBC2_Pg {

static private String driver = "org.postgresql.Driver";
private static String url =
"jdbc:postgresql://10.0.1.42:5432/pgdb?compatible=7.1"; // compatible 7.1
and 7.2

static void main(String argv[]) throws Exception{

Connection con = null;
Statement statement = null;
ResultSet rset = null;

try {
Class.forName(driver).newInstance();
con = DriverManager.getConnection(url, "user", "passwd");
con.setAutoCommit(false);
statement = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE);
}
catch (java.sql.SQLException e) {System.out.println("plaintage sql"
+e );
}
String strquery = "SELECT VALUE FROM WRONGTABLENAME\n";
System.out.println(strquery);
try {
String result;
rset= statement.executeQuery(strquery);
if (rset !=null && rset.next())
result= rset.getString("VALUE");
int i=0;
con.commit();
}
catch (java.sql.SQLException e) {System.out.println("error sql "
+e );
//con.rollback();
}

strquery = "DROP INDEX WRONGINDEXNAME\n";
System.out.println(strquery);

try {
statement.executeUpdate(strquery);
int i=0;
con.commit();
}
catch (java.sql.SQLException e) {System.out.println("error sql "
+e );
}
}
}

excecute this code As you can see the second query is not excecuted (no
exception appears);

this does not appears if I do not comment the rollback() insinde the catch
exception (in red);

but you understand that during a connection I don't always what to rollback
all modif when I catch an exception.

So that cause me a lots of problems .

Is there any solutions ?