java - Removing items from an array -

just started taking java 2, , has been on 6-7 months since i've taken java 1 , done programming @ all, please kind if did dumb

the majority of 3 classes below previous assignment took listing book , had add method called getmax() returns value of highest key in array, or -1 if array empty.

this part worked fine.

for next part(the part having trouble with) had modify assignment item highest key not returned method, removed array.

to tried:

public long removemax(printwriter pw)  {     long maxindex;     maxindex = getmax();     delete(maxindex);     return maxindex;  } 

but maxindex = getmax(); , delete(maxindex); giving me errors , i'm not quite sure why. although i'm convinced i'm making small mistake due being rusty @ programming.

the error giving me actual , formal argument lists differ in length. tried changing , switching things around no matter did nothing seemed work.

below employee, higharrayobject , project21rev(class getmax , removemax are) classes in full.

public class employee {     protected int empno;            // employee number     protected string ssno;          // social security number     protected string lastname;     // last name     protected string firstname; // first name      //this constructor initializes variables  public employee(int eno, string ssn, string lname, string fname)      // aliases used in function header {     empno = eno;    // alias assigned actual value     ssno = ssn;     lastname = lname;     firstname = fname; }  // make no argument constructor  public employee()  {     empno = 0;       ssno = "";     lastname = "";     firstname = ""; }  /**      copy constructor initializes object      copy of employee object     @param object2 object copy */  public employee(employee object2) {     empno = object2.empno;     ssno = object2.ssno;     lastname = object2.lastname;     firstname = object2.firstname; }   // set method sets value each field  public void set(int eno, string ssn, string lname, string fname) // aliases used in function header {     empno = eno;    // alias assigned actual value     ssno = ssn;     lastname = lname;     firstname = fname; }  // getkey method returns employee number  public int getkey()     { return empno; }     // setkey method sets employee number    public void setkey(int id)   { empno = id; }  // tostring method // returns string containing instructor information  public string tostring() {     // create string representing object.     string str = "employee number: " + empno +                      "\nsocial security number: " + ssno +                      "\nlast name: " + lastname +                      "\nfirst name: " + firstname; // return string; return str; } } 

start of next class

import java.io.*;  class higharrayobject {     protected employee[] emp;     protected int nelems;  public higharrayobject(int max) // constructor {     emp = new employee[max];     nelems = 0; }  // createemployees method creates employee object // each element of array  public static void createemployees(employee[] emp, int maxsize) {     int empno;     string ssno;     string lastname;     string firstname;      // create employees     for(int index = 0; index < emp.length; index++)     {     // employee data          emp[index] = new employee();     } }  public boolean find(long searchkey, printwriter pw) {     system.out.println("trying find item employee number " + searchkey);     pw.println("trying find item employee number " + searchkey);      int j;     for(j=0; j<nelems; j++)         if(emp[j].empno == searchkey)       // == ok since empno primative             break;                          // exit loop before end         if(j == nelems)                 // gone end?             return false;         else             return true;                    // no, found }  // end find()  public void insert(int eno, string sno, string lname, string fname, printwriter pw) {     system.out.println("inserting employee employee number " + eno);     pw.println("inserting employee employee number " + eno);       employee temp = new employee();     temp.empno = eno;     temp.ssno = sno;     temp.lastname = lname;     temp.firstname = fname;     emp[nelems] = temp;     nelems++; }  public boolean delete(long value, printwriter pw) {     system.out.println("deleting employee number " + value);     pw.println("deleting employee number " + value);      int j;     for(j=0; j < nelems; j++)               //         if(value == emp[j].empno)             break;                              // can't find         if(j==nelems)             return false;         else                                        // found         {             for(int k=j; k<nelems; k++) // move higher ones down             {                 emp[k]=emp[k+1];                             }         nelems--;                               // decrement size         return true;     } } // end delete  public void display(printwriter pw) {     system.out.println("the array of employees is: ");     pw.println("the array of employees is: ");      for(int j=0; j<nelems; j++)     {         system.out.println(emp[j].empno + " " + emp[j].ssno + " "          + emp[j].lastname + " " + emp[j].firstname);           pw.println(emp[j].empno + " " + emp[j].ssno + " "          + emp[j].lastname + " " + emp[j].firstname);      }   // end } // end delete } // end higharrayobject 

start of next class

import java.io.*;  public class project21rev extends higharrayobject       //reference gaddis p.658 {     public project21rev(int max)        // subclass constructor {     super(max);                     // call superclass constructor }  public void getmax(printwriter pw)  // new functionality required assignment    {    int maxindex = -1;  // not found yet  if(nelems == 0)     system.out.println("number of elements 0");     else     {     int max = emp[0].empno;  // assume first value largest      maxindex = 0;      (int = 1; < nelems; i++)  //now check rest of values largest     {         if(emp[i].empno > max)         {            maxindex = i;         }      }      system.out.println("the largest value " + emp[maxindex].empno + " " + emp[maxindex].ssno + " " + emp[maxindex].lastname + " " + emp[maxindex].firstname);        pw.println("the largest value " + emp[maxindex].empno + " " + emp[maxindex].ssno + " " + emp[maxindex].lastname + " " + emp[maxindex].firstname);      system.out.println("at location " + maxindex);      pw.println("at location " + maxindex);     }    }       public long removemax(printwriter pw)  {     long maxindex;     maxindex = getmax();     delete(maxindex);     return maxindex;  }  // modified find method follows       public void find( int searchkey, printwriter pw)    {    system.out.println("trying find item employee number " + searchkey);   pw.println("trying find item employee number " + searchkey);    int j;   boolean found = false;   for(j=0; j < nelems; j++)      if(emp[j].empno == searchkey)      {         found = true;         system.out.println("found " + emp[j].empno + " " + emp[j].ssno + " " + emp[j].lastname + " " + emp[j].firstname);         pw.println("found " + emp[j].empno + " " + emp[j].ssno + " " + emp[j].lastname + " " + emp[j].firstname);         system.out.println("at location " + j);         pw.println("at location " + j);      }      if(found == false)      {         system.out.println(searchkey + " not found");         pw.println(searchkey + " not found");      } } }  class project21revapp {    public static void main(string[] args) throws ioexception    {     // set printer output file   printwriter pw = new printwriter(new bufferedwriter        (new filewriter("output21.dat")));    int maxsize = 100;            // array size   project21rev arr;                // reference array   arr = new project21rev(maxsize); // create array    arr.insert(77,"a","b","c",pw);     arr.insert(99,"d","e","f",pw);     arr.insert(44,"g","h","i",pw);     arr.insert(55,"j","k","l",pw);     arr.insert(22,"m","n","o",pw);     arr.insert(88,"p","q","r",pw);     arr.insert(11,"s","t","u",pw);     arr.insert(00,"v","w","x",pw);     arr.insert(66,"y","z","aa",pw);     arr.insert(33,"bb","cc","dd",pw);    arr.display(pw);                // display items    int searchkey = 35;           // search item   arr.find(searchkey, pw);                   searchkey = 22;           // search item   arr.find(searchkey, pw);    arr.delete(00, pw);               // delete 3 items   arr.delete(55, pw);   arr.delete(99, pw);    arr.display(pw);                // display items again    // new functionality follows     arr.getmax(pw);       pw.close();     }  // end main() }  // end class project21revapp 

well, error message tells what's wrong.

your method delete() accepts 2 parameters:

public boolean delete(long value, printwriter pw) {     // ... } 

you trying call one:

delete(maxindex); 

to fix error, pass right amount , types of parameters.