如何將int數組值傳遞給Java中的另一個類

Question

我有三個類，一個是鏈接列表類，一個LinkLLiat1類和一個LinkList2類。任何一個都可以幫助我將getStudentID值傳遞給鏈接列表類。

這是LinkList1類

   public class LinkList1 
    {
       public LinkList1 next;

       private int EmployeeID;
       private String EmployeeName;
       private String EmpContactNo;
       private String DOB;
       private String DateofJoined;
       private String DepatmentName;  


       public LinkList1 (int Employeeid, String Employeename, String EmpContactno, String dob, String Dateofjoined, String Depatmentname)
       {

           EmployeeID=Employeeid; // initialized class variable
           EmployeeName=Employeename; // initialized class variable
           EmpContactNo=EmpContactno; // initialized class variable
           DOB=dob; // initialized class variable
           DateofJoined=Dateofjoined; // initialized class variable
           DepatmentName=Depatmentname; // initialized class variable
       }
       public void DisplayLink()
       {
           System.out.println("("+EmployeeID+","+EmployeeName+","+EmpContactNo+","+DOB
                   +","+DateofJoined+","+DepatmentName.toUpperCase()+")");
       }
            public int getStudentID()
       {
           return EmployeeID;
       }
    }

這是在LinkList2中。

public class LinkList2 
{
    private LinkList1 first; // refer tp first link on the list
       public LinkList2 () // constructor
       {
           first = null; // no items on list yet
       }
       public boolean empty()
       {
           return (first==null);
       }
       public void insert(int Employeeid, String Employeename, String EmpContactno, String dob, String Dateofjoined, String Depatmentname)
       {
           LinkList1 newLinkList1= new LinkList1(Employeeid, Employeename, EmpContactno, dob, Dateofjoined, Depatmentname);
           newLinkList1.next= first; // newlink --> old first
           first = newLinkList1; // first --> new link

       }

       public LinkList1 delete() // elete first item
       {
           LinkList1 tem=first; //save reference to link
           first = first.next; //selete it: first--> old next
           return tem; // return deleted link
       }
  public int[] myListStudent(LinkList2 thelist)
  {
      int myStudentNo[]=new int[5];
       LinkList1 current = first;
       int i=0;
        while (thelist!=null) // until end of list
           {
            int a=current.getStudentID();
               myStudentNo[i]=current.getStudentID();
               current = current.next; //move to next link
           }

      return myStudentNo;

  }
       public void displaylist()
       {
           System.out.println(" ID, Name, Contact No" + 
                   "Date of Birth. Date of Joined, Work Department ID");
           LinkList1 current = first; // start at beginning of list
           while (current!=null) // until end of list
           {
               current.DisplayLink(); //print data
               current = current.next; //move to next link
           }
           System.out.println("");
           }



}

我需要將上述類的getStudentID值獲取到位於mainlinklist類中的myArray。

    public class LinkList 
{




    public static void main(String[] args) 
    {
        LinkList2 thelist = new LinkList2(); // make new list

        thelist.insert(1, "ssd", "071123456", "9.10.1993", "10.11.2010", "HR");
        thelist.insert(12, "dcfs", "071123456", "9.10.1993", "10.11.2010", "ACC");

        thelist.displaylist();

         LinkList2 myStudent = new LinkList2();
         int myArray[];
         myArray=myStudent.myListStudent(thelist);
        while(!thelist.empty())
        {
            LinkList1 aLink = thelist.delete();
            System.out.println("Deleted");
            aLink.DisplayLink();
            System.out.println();
            System.out.println("");  
        }


    }


}

我想做的是將LinkList1中的EmployeeID vlues鏈接到LinkList2和Linklist ..我想收集值EmployeeID ..我不知道我在做什么，完全是錯誤的.. :)這意味着下面的myStudentNo到鏈接列表中的MyArray。

 public int[] myListStudent(LinkList2 thelist)
      {
          int myStudentNo[]=new int[5];
           LinkList1 current = first;
           int i=0;
            while (thelist!=null) // until end of list
               {
                int a=current.getStudentID();
                   myStudentNo[i]=current.getStudentID();
                   current = current.next; //move to next link
               }

          return myStudentNo;

      }

Answer 1

您可以通過構造函數傳遞它。

例如。 當您創建類的實例時

CLASS name = new CLASS(variableToPass);

更新：

創建要傳遞給該類的實例時，請將該變量用作該類的構造函數的參數。 我希望現在更容易理解。

創建類的新實例時，將調用構造函數。

這是構造函數的示例：

public ClassName() {
}

該構造函數不帶參數，因此創建該類的實例如下：

ClassName class = new ClassName();

構造函數還可以接受參數並將其設置為值：

int i = 0;

public ClassName(int i){
this.i = i;
}

ClassName class = new ClassName(1);

這會將i的實例變量設置為給定i的值。 這個。 引用實例變量。

您應該以這種方式添加要通過構造函數傳遞的內容。