Java 越界错误

Question

当我输入 1 条记录并选择 1. 添加记录时，它总是出现错误。当我输入 2 条记录时，我只能输入 1 条记录，当我选择 1. 再次添加记录时，它会显示 OutofBounds。我该如何修复该错误？

public static int recno=0, recsize, choice, i=0;

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];

  display_menu(EmpNo,recno);
}

public static void add_Rec(String EmpNo[],  int recno) throws IOException{
  ++recno;
  EmpNo[recno]= "EMP-"+ recno;
  System.out.print("Employee Number: " + EmpNo[recno]);

  System.out.print("\nEmployee Name: ");

  display_menu(EmpNo,recno);
}


public static void display_menu(String EmpNo[],  int recno) throws IOException{
  System.out.println("Main Menu");
  System.out.println("1. Add record");
  System.out.println("Enter Your Choice");
  choice = Integer.parseInt(reader.readLine());
  if (choice==1){
    add_Rec(EmpNo,recno);
  }
}

Answer 1

您应该替换以下内容:

++recno;
EmpNo[recno] = "EMP-" + recno;

与:

if (recno < recsize) {
    EmpNo[recno++] = "EMP-" + recno;
    // ...
}