RFID TAGS using Java netbeans

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Java

Hi everyone
i am doing a project on smart classroom in Java. :confused:
in this project i have to make an application in Java using RFID Tags. I have to create an application which will get the students attendance using RFID. when the student enter in the class they should scan their hands and the information should go to the main server. After this the teacher should need to confirm that every one in the class room so teacher will use the P.D.A and when teacher will press the ok button on the P.D.A the information should go the main server wirelessly . would any one please help me about this problem thanks