$(2$ java codes$)$

$1-$Use a Queue for handling patients requests ER Room, considering its attributes and operations$($have the user enter the patient and use linked list$).$

$2-$What if the user tried to dequeue an empty queue. discuss how would you check such case, execute a test case and create an error handling method for such case in specific$($queue $,$ de queue $,$ if statment$).$