java y mysql

[MARIAjava]

Hola, estoy haciendo unas tablas con sql y java pero me da este error y no entiendo donde me equivoco...

com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:

** BEGIN NESTED EXCEPTION **

java.net.SocketException
MESSAGE: java.net.ConnectException: Connection refused: connect

STACKTRACE:

java.net.SocketException: java.net.ConnectException: Connection refused: connect
at com.mysql.jdbc.StandardSocketFactory.connect(Stand ardSocketFactory.java:156)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:284)
at com.mysql.jdbc.Connection.createNewIO(Connection.j ava:2569)
at com.mysql.jdbc.Connection.<init>(Connection.java:1 485)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonReg isteringDriver.java:266)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at Conectar.creaConexion(Conectar.java:36)
at Tablas.main(Tablas.java:123)


** END NESTED EXCEPTION **



Last packet sent to the server was 33 ms ago.
Exception in thread "main" java.lang.NullPointerException
at Tablas.tablaJugadores(Tablas.java:90)
at Tablas.main(Tablas.java:125)



La linea del código es: stmt = con.createStatement();

Gracias de antemano!!!