kotlin获取属性

The task is to get system MAC address.

任务是获取系统MAC地址。

package com.includehelp
import java.net.InetAddress
import java.net.NetworkInterface
//Function to get System MAC
fun getSystemMac(): String? {
return try {
val OSName = System.getProperty("os.name")     //Get Operating System Name
if (OSName.contains("Windows")) {
getMAC4Windows()                           // Call if OS is Windows
} else {
var mac = getMAC4Linux("eth0")
if (mac == null) {
mac = getMAC4Linux("eth1")
if (mac == null) {
mac = getMAC4Linux("eth2")
if (mac == null) {
mac = getMAC4Linux("usb0")
}
}
}
mac
}
} catch (E: Exception) {
System.err.println("System Mac Exp : " + E.message)
null
}
}
/**
* Method for get MAc of Linux Machine
*/
fun getMAC4Linux(name: String): String? {
return try {
val network = NetworkInterface.getByName(name)
val mac = network.hardwareAddress
val sb = StringBuilder()
for (i in mac.indices) {
sb.append(String.format("%02X%s", mac[i], if (i < mac.size - 1) "-" else ""))
}
sb.toString()
} catch (E: Exception) {
System.err.println("System Linux MAC Exp : " + E.message)
null
}
}
/**
* Method for get Mac Address of Windows Machine
*/
fun getMAC4Windows(): String? {
return try {
val addr = InetAddress.getLocalHost()
val network = NetworkInterface.getByInetAddress(addr)
val mac = network.hardwareAddress
val sb = StringBuilder()
for (i in mac.indices) {
sb.append(String.format("%02X%s", mac[i], if (i < mac.size - 1) "-" else ""))
}
sb.toString()
} catch (E: Exception) {
System.err.println("System Windows MAC Exp : " + E.message)
null
}
}
//Main Function, Entry Point of Program
fun main(args: Array<String>) {
//Call Function to get MAC Address
val macAddress = getSystemMac()
//Print MAC Address
println("System Mac Address : $macAddress")
}

Output

输出量

System Mac Address : 02-12-FE-11-00-05

翻译自: https://www.includehelp.com/kotlin/get-system-mac-address.aspx

kotlin获取属性