如何将int数组值传递给Java中的另一个类

Question

我有三个类，一个是链接列表类，一个LinkLLiat1类和一个LinkList2类。任何一个都可以帮助我将getStudentID值传递给链接列表类。

这是LinkList1类

   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;
       }
    }

这是在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("");
           }



}

我需要将上述类的getStudentID值获取到位于mainlinklist类中的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("");  
        }


    }


}

我想做的是将LinkList1中的EmployeeID vlues链接到LinkList2和Linklist ..我想收集值EmployeeID ..我不知道我在做什么，完全是错误的.. :)这意味着下面的myStudentNo到链接列表中的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

您可以通过构造函数传递它。

例如。 当您创建类的实例时

CLASS name = new CLASS(variableToPass);

更新：

创建要传递给该类的实例时，请将该变量用作该类的构造函数的参数。 我希望现在更容易理解。

创建类的新实例时，将调用构造函数。

这是构造函数的示例：

public ClassName() {
}

该构造函数不带参数，因此创建该类的实例如下：

ClassName class = new ClassName();

构造函数还可以接受参数并将其设置为值：

int i = 0;

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

ClassName class = new ClassName(1);

这会将i的实例变量设置为给定i的值。 这个。 引用实例变量。

您应该以这种方式添加要通过构造函数传递的内容。