嵌套的循环问题

这段代码在Netbeans Java中返回了一个问题

public static void main(String str[]) throws Exception {
    NetworkInterface[] devices = JpcapCaptor.getDeviceList();

    for (int i = 0; i < devices.length; i++) {
        System.out.println(i + " :" + devices[i].name + "(" + devices[i].description + ")");
        System.out.println("    data link:" + devices[i].datalink_name + "(" + devices[i].datalink_description + ")");
        System.out.print("    MAC address:");            
        for (byte b : devices[i].mac_address) {                 
            System.out.print(Integer.toHexString(b & 0xff) + ":");
        }
        System.out.println();
        for (NetworkInterfaceAddress a : devices[i].addresses) {
            System.out.println("    address:" + a.address + " " + a.subnet + " " + a.broadcast);
        }
    }

    JpcapCaptor jpcap = JpcapCaptor.openDevice(devices[1], 2000, true, 20);    
    jpcap.loopPacket(-1, new packet_cap());
}

两行代码被列为“非声明”，并且被预期为）和}。

for (int i = 0; i < devices.length; i++)

和

System.out.print(Integer.toHexString(b & 0xff) + ":");

我确定这些问题是相关的。