How do I use or create a variable of a private class in Java -

i'm creating inventory system(doing fun) , have chose use queues data structure in java. use private class within public class , when i'm trying run test queue can't declare variable of private class. here's code

the class contains private class

public class customer {//begining of class      private class custque //creating private class use node    {         private int    trn;          private string lname;         private string fname;         private string mname;         private string mstatus;         private string dob;         private string email;         private string permanentadd;         private string mailingadd;         custque next;             public  custque()//default constructor           {             trn=0;             lname="";             fname="";             mname="";             mstatus="";             dob="";             email="";             permanentadd="";             mailingadd="";             this.next= next;            }            public custque(int t, string ln, string fn,string mn, string ms, string dob, string email, string pa, string ma)//primary constructor           {                trn=t;                lname=ln;                fname=fn;                mname=mn;                mstatus=ms;                dob=dob;                email=email;                permanentadd=pa;                mailingadd=ma;            }           public void settrn(int t)//trn setter          {            this.trn= t;           }           public int gettrn() // trn getter          {            return trn;           }          public void setlname(string ln)         {           this.lname=ln;         }          public string getlname()         {          return lname;         }          public void setfname(string fn)         {          this.fname=fn;         }         public string getfname()        {         return fname;        }         public void setmname(string mn)        {         this.mname=mn;        }        public string getmname()       {          return mname;       }        public void setmstatus(string ms)       {         this.mstatus=ms;       }        public string getmstatus()       {        return mstatus;       }       public void setdob(string dob)      {       this.dob=dob;      }        public string getdob()      {        return dob;      }       public void setemail(string email)      {       this.email=email;      }        public string getemail()       {        return email;       }         public void setpermanentadd(string pa)        {          this.permanentadd=pa;        }         public string getpermanentadd()         {           return permanentadd;         }        public void setmailingadd(string ma)        {          this.mailingadd=ma;        }         public string getmailingadd()       {        return mailingadd;       }   }// end of private class   private custque front;  private custque last;   public void enqueue (int trn, string ln, string fn, string mn, string ms,string dob,string email,string pa, string ma)  {      custque que = new custque();//  creating variable queue null      if (que.equals(null))// testing if queue null         system.out.println("an error has occur");         que.settrn(trn);        que.setlname(ln);        que.setfname(fn);        que.setmname(mn);        que.setmstatus(ms);        que.setdob(dob);        que.setemail(email);        que.setpermanentadd(pa);        que.setmailingadd(ma);        if(front.equals(null))         last=front=que;       else         last.next = que;          last = que;    }// end of enqueue   public custque dequeue()  {      if (front.equals(null))       {          system.out.printf("queue empty");          return null;      }       custque i;      i=front;      front = front.next;      return front ;   }// end of dequeue     void display()  {       custque d;       if(front != null)       {          d=front;          system.out.printf("" + d);       }  }   }//end of main class 

my driver class

import java.util.scanner;   public class driver  {  public static void main(string[] args) {         int t,i;         string ln,fn,mn,ms,dob,email,pa,ma;         custque s;/* line of error*/          for(i=0; i<5;i++)         {             system.out.printf("");             scanner num = new scanner(system.in);             t= num.nextint();              system.out.printf("");             scanner l = new scanner(system.in);             ln = l.nextline();              system.out.printf("");             scanner f = new scanner(system.in);             fn = f.nextline();              system.out.printf("");             scanner m = new scanner(system.in);             mn = m.nextline();              system.out.printf("");             scanner mar = new scanner(system.in);             ms = mar.nextline();              system.out.printf("");             scanner d = new scanner(system.in);             dob = d.nextline();              system.out.printf("");             scanner e = new scanner(system.in);             email = e.nextline();              system.out.printf("");             scanner per = new scanner(system.in);             pa = per.nextline();              system.out.printf("");             scanner mai = new scanner(system.in);             ma = mai.nextline();           }// end of loop  }  }//end of driver 

a private inner class means can access inside outer class, in case customer. in fact, if declaring private inner class saying: "i want nobody can see class". going against 1 code.

but, @hovercraft full of eels says, requiremnt behind this. maybe can more. or it's doubt java semantics?