الاسئله والاستفسارات فى ماده برمجه الشبكات

public class root{


public static void main(String args[]){


int A=2,B=3,C=4;
double D;
D=B*B-4*A*C;

if(D<0)
{
System.out.print("Imag. roots"); //where is the value of D that we want??!!
}
else
{
System.out.print("Real roots"); // there is nothing to print except this words without the value!!
}






}

}

public class mob extends thread
{
int ipad,my ip;
public mob(ipad)
{
my ip=ip ad,
}
public void run()
{
if(my ip=1)
{
system.out.println("myip="+myip)
}
else
{
system.out.println("myip="+myip)
}
else
system.out.println("myip="+myip)
}
public class driver
{
mob[]ms=new mob[2];
for(inti=1;i<3;i++)
{
int ipad=i;
ms[i]=mob(ipad);
}