java - 怎样才能看到之前的记录呢？

Question

     public static BufferedReader reader = new BufferedReader (new InputStreamReader(System.in));
    public static int recno=0, recsize, choice, i=0, k=1;
    public static String ans;


     public static void main (String args[]) throws IOException
    {
        System.out.print("Enter Number of Records: ");
        recsize = Integer.parseInt(reader.readLine());
        String EmpNo[] = new String[recsize];
        String EmpName[] = new String[recsize];
        String Salary[] = new String[recsize];

        display_menu(EmpNo, EmpName, Salary,recno);
    }

我怎样才能重复这个？ System.out.print("\n你想看下一条记录吗？[按p]");例如，我将放置 3 条记录，并希望查看之前的其他记录，直到到达第一条记录。

        public static void pre_Rec(String EmpNo[], String EmpName[], String Salary[], int recno) throws IOException{

                String pre;
            System.out.print("\nEmployee Number: "+EmpNo[recno]);
            System.out.print("\nEmployee Number: "+EmpName[recno]);
            System.out.print("\nEmployee Number: "+Salary[recno]);
            System.out.print("\nDo you want to see the next record ? [press p]");
            pre = reader.readLine();


            if(pre!="p"){
                recno--;
                System.out.print("\nEmployee Number: "+EmpNo[recno]);
                System.out.print("\nEmployee Number: "+EmpName[recno]);
                System.out.print("\nEmployee Number: "+Salary[recno]);

                 }
                      System.out.println ("\n\nDo you want to go back in the Display Menu ? [y/n]: ");
                      ans = reader.readLine();
                      if (ans.equals("y")){
                      display_menu(EmpNo, EmpName, Salary,recno);
                    }
                      else{
                      System.out.println("Thank You for Using this Program!");
                    }


            }

Answer 1

您好，我想帮助您，但您的描述非常模糊且令人困惑，您能否列出一个列表来描述该程序打算执行的步骤。我查看了您的代码，并从您的描述中了解到这可能会有所帮助。

    Scanner scanner = new Scanner(System.in);

    System.out.print("Enter Number of Records: ");
    int numOfRecords = scanner.nextInt();

    for(int x = 0; x <= numOfRecords; x++) {
    String EmpNo[] = new String[numOfRecords];
    String EmpName[] = new String[numOfRecords];
    String Salary[] = new String[numOfRecords];
   }

   //Whatever else you want to do