import java.io.*;

class ReadMAC  
{
	
	public  static String physicalAddress = "read MAC error";
	
	public ReadMAC()
	{
	}

	public static String checkPhysicalAddress()
	{
		try
		{
			String line;
			Process process = Runtime.getRuntime().exec("C:\\WINDOWS\\system32\\ipconfig /all");
		    //Process process = Runtime.getRuntime().exec("cmd /c ipconfig /all");
			//Process process = Runtime.getRuntime().exec("E:\\QQ\\QQ.exe" );
			System.out.println("begin to read mac address" );
			BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream())); 
			System.out.println( "hehe" );
			while( ( line = br.readLine() ) != null )

			{
				if( line.indexOf( "Physical Address. . . . . . . . . :")  != -1 )
				{
					if ( line.indexOf( ":" ) != -1 )
					{
						physicalAddress = line.substring( line.indexOf(":") + 2 );
						break;
					}
				}
			}
			line = br.readLine();
			System.out.println( line );
			System.out.println( "ok" );
			process.waitFor(); 

		}
		catch ( Exception e )
		{
			e.printStackTrace();
		}
		return physicalAddress;
	}


	public static void main(String[] args) 
	{
		System.out.println("Hello World!");
		System.out.println( "本機(jī)的MAC地址是：" + ReadMAC.checkPhysicalAddress() );

	}
}