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    Expert tip

    MySQL doesn't support some types of characters (such as emojis) with the utf8 encoding. You need to be on MySQL 5.5+ and force utf8mb4 (everywhere, client and server). You can do this sending the query "SET NAMES utf8mb4". Check this https://goo.gl/3E2qzg

Solutions on the web

via hsqldb by vampire0
, 1 year ago
Operation not allowed after ResultSet closed
via mysql.com by Unknown author, 1 year ago
via Stack Overflow by M Bta
, 2 years ago
Operation not allowed after ResultSet closed
via mysql.com by Unknown author, 1 year ago
via Stack Overflow by ratnesh
, 2 years ago
Operation not allowed after ResultSet closed
java.sql.SQLException: Operation not allowed after ResultSet closed	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1078)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:975)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:920)	at com.mysql.jdbc.ResultSetImpl.checkClosed(ResultSetImpl.java:804)	at com.mysql.jdbc.ResultSetImpl.next(ResultSetImpl.java:6986)	at Main.doIt(Main.java:28)	at Main.main(Main.java:12)