Problems connecting java with mysql local network

I have a server Mysql installed and started in Raspberry pi with local address 192.xxx.0.1xx connected to the network and from another computer I try to establish a connection with a Java program with this code:

public class BaseDatosMySQL {

private Connection conexion;

public static void main(String[] args) {
    BaseDatosMySQL baseDatos = new BaseDatosMySQL();
    baseDatos.conectar();
    Tabla tabla = new Tabla(baseDatos.getConexion());
    String[] nombreColumnas = { "id", "nick" };
    String[] tipoColumnas = { "INT AUTO_INCREMENT, PRIMARY KEY(id)", "TEXT" };
    tabla.crearTabla("usuarios", nombreColumnas, tipoColumnas);
    baseDatos.desconectar();
}

public void conectar() {
    try {

        Class.forName("com.mysql.jdbc.Driver");
        conexion = DriverManager.getConnection("jdbc:mysql://1XX.168.0.1XX/localhost:3306/ChatEscrito",
                "root", "lapasscorrecta");
        System.out.println("Conexion a la base de datos realizada");
    } catch (ClassNotFoundException | SQLException e) {
        e.printStackTrace();
    }
}

public void desconectar() {
    try {
        conexion.close();
    } catch (SQLException e) {
        e.printStackTrace();
    }
}

public Connection getConexion() {
    return conexion;
}

public void setConexion(Connection conexion) {
    this.conexion = conexion;
}

}

What causes me these errors:

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications     link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:989)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:341)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2192)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2225)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2024)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:779)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:389)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at cuerpo.BaseDatosMySQL.conectar(BaseDatosMySQL.java:30)
at cuerpo.BaseDatosMySQL.main(BaseDatosMySQL.java:16)
Caused by: java.net.ConnectException: Conexión rehusada (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:300)
... 16 more
Exception in thread "main" java.lang.NullPointerException
at utilidades.Tabla.crearTabla(Tabla.java:22)
at cuerpo.BaseDatosMySQL.main(BaseDatosMySQL.java:20)

Let's see if you can help me.

  

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