Run Java Code in Matlab

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PTP 2016-3-5

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评论： Geoff Hayes 2016-3-9

Hello Everyone,

I want to run the following Java Code in Matlab to open a UDP socket and listen for incoming multicast datagrams. ------------------------------------------------------------------------------------------------------------

socket = java.net.MultiSocket(streamPort);
socket.joinGroup(java.net.InetAddress.getByName(streamIP));
socket.setReuseAddress(1);
packet = java.net.DatagramPacket(zeros(1, intmax('uint16'), 'int8'), intmax('uint16'));
socket.receive(packet);
socket.leaveGroup(InetAddress.getByName(streamIP));
socket.close;
msg = packet.getData;
msg = msg(1:packet.getLength);

------------------------------------------------------------------------------------------------------------

I am trying to do the same in matlab but i get error: Undefined variable java or class java.net.MultiSocket. How to add javaclasspath?

Regards

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PTP 2016-3-9

编辑：PTP 2016-3-9

Hi Geoff,

I am working on a Java wrapper in matlab. Since Matlab cannot handle mutlicast transmission with respect to UDP so I had to run the Java code in matlab.

By setting classpath.txt and initializing the class object and then finally calling the main function of the class in java, I am able to receive the data from another node. But now I am successfull in doing that also, the only problem now that remains is that in the end I am unable to read the data received since it is some random binary characters.

How to convert that data into String/Character so that Humans can interpret it.

I would appreciate your help.

Geoff Hayes 2016-3-9

PTP - what happens when you create the received String variable? Are you expecting something else (a valid string) or ...? What data type is dgram? Does dgram.GetData() return an array of bytes?

I am unable to read the data received since it is some random binary characters. Should it be non-random instead?

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