Netbeans - Duda codigos

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package IP;

import java.io.UnsupportedEncodingException;

import java.net.Inet4Address;

import java.net.InetAddress;

import java.net.UnknownHostException;

/**

 *

 * @author HP-Invisible

 */

public class IPPC {

    private String PCTemp;

    String IPTempStr;

    InetAddress IPTemp;

    InetAddress IPTemp2;

    private ArrayIndexOutOfBoundsException ar;

    String argumento;

    String[] arreglo;

    private boolean bandera = true;

    public void Obtener() throws UnknownHostException, UnsupportedEncodingException {

       // InetAddress localHost = InetAddress.getLocalHost();

        //argumento = arreglo[0];

        //PCTemp = localHost.getHostName();

        IPTemp = InetAddress.getLocalHost();

       // IPTemp = localHost.getAddress();

        // InetAddress.getByName(String host)

        //  getBytes(IPTemp);

        //System.out.println(PCTemp);

        System.out.println(IPTemp);

    }

    public void validar() throws UnknownHostException {

        //InetAddress = IPTemp2;

        IPTemp2 = InetAddress.getLocalHost();

        if(IPTemp == IPTemp2){

        bandera = true;

            System.out.println("No cambio");

        }

        else

        {

        bandera = false;

            System.out.println("Cambio");

        }

    }

}