ActiveMQ in Eclipse to listen to remote broker - eclipse

Question

My goal is to listen to a broker on a port on a specific IP address with a given topic to receive JMS messages from there with ActiveMQ in Eclipse IDE.
Here is my code:
public static void main(String[] args) throws URISyntaxException, Exception {
Connection Connection = null;
try {
// Producer
ConnectionFactory ConnectionFactory = new ActiveMQConnectionFactory("tcp://1.2.3.4:5678");
Connection = ConnectionFactory.createConnection();
Connection.start();
Session session = Connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
Topic topic = session.createTopic("MyTopic");
// Consumer1 subscribes to customerTopic
MessageConsumer consumer1 = session.createConsumer(topic);
consumer1.setMessageListener(new MessageConsumeListener("MyTopic"));
System.out.print("connected");
Thread.sleep(3000);
/* session.close(); */
} finally {
if (Connection != null) {
Connection.close();
}
}
}
This is the error:
Exception in thread "main" javax.jms.JMSException: Could not connect to broker URL: tcp://1.2.3.4.5678 Reason: java.net.ConnectException: Connection refused (Connection refused)
at org.apache.activemq.util.JMSExceptionSupport.create(JMSExceptionSupport.java:36)
at org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:360)
at org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:305)
at org.apache.activemq.ActiveMQConnectionFactory.createConnection(ActiveMQConnectionFactory.java:245)
at My.Project.subscribelistener.main(subscribelistener.java:29)
And also this:
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.base/java.net.Socket.connect(Socket.java:609)
at org.apache.activemq.transport.tcp.TcpTransport.connect(TcpTransport.java:501)
at org.apache.activemq.transport.tcp.TcpTransport.doStart(TcpTransport.java:464)
at org.apache.activemq.util.ServiceSupport.start(ServiceSupport.java:55)
at org.apache.activemq.transport.AbstractInactivityMonitor.start(AbstractInactivityMonitor.java:168)
at org.apache.activemq.transport.InactivityMonitor.start(InactivityMonitor.java:50)
at org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58)
at org.apache.activemq.transport.WireFormatNegotiator.start(WireFormatNegotiator.java:72)
at org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58)
at org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58)
at org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:340)
... 3 more
I can also ping the IP address and with telnet I can connect to the port.
How can I connect to a remote broker?