C:\floatqueue>javac TestQueue.java

C:\floatqueue>java TestQueue
java.lang.IllegalArgumentException: initialize a negative capacity queue
[]
[1.5]
[1.5 2.0]
[1.5 2.0 2.5]
[1.5 2.0 2.5 3.0]
[1.5 2.0 2.5 3.0 3.5]
java.lang.IllegalStateException: enqueue a full queue
dequeue 1.5[2.0 2.5 3.0 3.5]
dequeue 2.0[2.5 3.0 3.5]
dequeue 2.5[3.0 3.5]
dequeue 3.0[3.5]
dequeue 3.5[]
java.lang.IllegalStateException: dequeue an empty queue
[-1.5]
[-1.5 -2.0]
[-1.5 -2.0 -2.5]
dequeue -1.5[-2.0 -2.5]
dequeue -2.0[-2.5]
dequeue -2.5[]
[-15.1]
[-15.1 -20.1]
[-15.1 -20.1 -25.1]
[-15.1 -20.1 -25.1 -30.1]
dequeue -15.1[-20.1 -25.1 -30.1]
dequeue -20.1[-25.1 -30.1]
dequeue -25.1[-30.1]
dequeue -30.1[]

C:\floatqueue>em.out.print("dequeue "+Q.dequeue()); Q.selfPrint();