这是dmesg |grep usb的输出:[ 29.580760] usb2-7: device not accepting address 5, error -71
[ 29.692831] usb 2-7: new full-speed USB device number] usb 2-7: New USB device strings: Mfr=0, Product=
7: reset high-speed USB device number 8 using ehci_hcd[216219.096159] usb 2-7: USB disconnect, device number 8
[216221.100042] usb 2-7: new high-speed USB device num
input20[ 16.392232] uvcvideo 2-[ 16.392236] uvcvideo 2-7:1.0: Entity type for entity Processing 2 was not initialized![ 16.392240] uvcvideo 2-7:1.0: Entity type for entity Camera 1 was not initiali
entrants = 0;boolean valid = false; //this is for the initial numberof runners question - it will stay false and keep us in the loop until a number between 2-7 is enteredSystem.out.println("Please enter the number<