Question

我无法将新变量从adminadd类获取到adminview类。我想将新客户添加到管理员视图，但我不能。请帮助大家这是我的两个类的代码

  public class adminview {
      public void view() {
          String table[] = {
              "Account Number",
              "Account Name",
              "Balance",
              "Pin Number"
          };
          String acct[] = {
              "0123-4567-8901",
              "2345-6789-0123",
              "3456-7890-1234",
              "4567-8901-2345",
              "5678-9012-3456"
          };
          String name[] = {
              "Dina Balle",
              "Mally Gaya",
              "Toto Lee",
              "Mina Mahal",
              "Cory Pot"
          };
          int bal[] = {
              5000,
              0,
              10000,
              2500,
              10000
          };
          int pinarr[] = {
              0000,
              1111,
              2222,
              3333,
              4444,
              5555
          }; {
              System.out.print("====================FBC====================\n\nFILIPINAS BANKING CORPORATION\n\n" + table[0] + "\t\t" + table[1] + "\t\t" + table[2] + "\t\t" + table[3] + "\n");
              System.out.println(acct[0] + "\t\t" + name[0] + "\t\t\t" + bal[0] + "\t\t\t" + pinarr[1]);
              System.out.println(acct[1] + "\t\t" + name[1] + "\t\t\t" + bal[0] + "\t\t\t" + pinarr[2]);
              System.out.println(acct[2] + "\t\t" + name[2] + "\t\t\t" + bal[2] + "\t\t\t" + pinarr[3]);
              System.out.println(acct[3] + "\t\t" + name[3] + "\t\t\t" + bal[3] + "\t\t\t" + pinarr[4]);
              System.out.println(acct[4] + "\t\t" + name[4] + "\t\t\t" + bal[4] + "\t\t\t" + pinarr[5]);
          }
      }
  }
  import java.util.Scanner;
  public class adminadd {
      public static void add() {
          Scanner sc = new Scanner(System.in);
          String nname;
          String nacct;
          int nbal;
          int npin;
          String table[] = {
              "Account Number",
              "Account Name",
              "Balance",
              "Pin Number"
          };
          String acct[] = {
              "0123-4567-8901",
              "2345-6789-0123",
              "3456-7890-1234",
              "4567-8901-2345",
              "5678-9012-3456"
          };
          String newaact[] = {
              ""
          };
          String name[] = {
              "Dina Balle",
              "Mally Gaya",
              "Toto Lee",
              "Mina Mahal",
              "Cory Pot"
          };
          String newname[] = {
              ""
          };
          int bal[] = {
              5000,
              0,
              10000,
              2500,
              10000
          };
          int pinarr[] = {
              0000,
              1111,
              2222,
              3333,
              4444,
              5555
          };
          System.out.print("====================FBC====================\n\nFILIPINAS BANKING CORPORATION\n");
          System.out.print("Enter New Account #: ");
          nacct = sc.nextLine();
          System.out.print("Enter New Customer: ");
          nname = sc.nextLine();
          System.out.print("Enter New Balance: ");
          nbal = sc.nextInt();
          System.out.print("Enter New Pin: ");
          npin = sc.nextInt();
          System.out.print("\n\n");
          System.out.println("Account #\t\t\tAccount Name\t\tBalance\t\t\tPin");
          System.out.println(acct[0] + "\t\t" + name[0] + "\t\t\t" + bal[0] + "\t\t\t" + pinarr[1]);
          System.out.println(acct[1] + "\t\t" + name[1] + "\t\t\t" + bal[0] + "\t\t\t" + pinarr[2]);
          System.out.println(acct[2] + "\t\t" + name[2] + "\t\t\t" + bal[2] + "\t\t\t" + pinarr[3]);
          System.out.println(acct[3] + "\t\t" + name[3] + "\t\t\t" + bal[3] + "\t\t\t" + pinarr[4]);
          System.out.println(acct[4] + "\t\t" + name[4] + "\t\t\t" + bal[4] + "\t\t\t" + pinarr[5]);
          System.out.println(nacct + "\t\t" + nname + "\t\t\t" + nbal + "\t\t\t" + npin);
      }
  }

Answer 1

虽然不是很好的做法，但你可以通过调用它来获得一个公共变量从一个类到另一个类，就像这个“class.yourvariable”

通常，建议将实例变量设置为private，并通过getter和setter获取它们。

Answer 2

使用吸气剂。如果不可能，请使用反射。

我认为它会是这样的：

Object val = YourClass.class.getDeclaredField("fieldName").get(YourInstance);

如何从另一个类中获取变量的值？

2 个答案: