在Java中從控制檯讀取

Question

這是我的代碼

import java.util.InputMismatchException; 
import java.util.NoSuchElementException; 
import java.util.Scanner; 

public class Person { 
    private static final String VALID_NAME = "Please enter a valid name!"; 
    private static final String VALID_ID = "ID must contain integers"; 
    private static final String VALID_ADDRESS = "Please enter a valid adress!"; 
    private static final String VALID_INPUT = "Bad input"; 

    public static Scanner input = new Scanner(System.in); 

    public static String inputAdress() { 
     String personAdress = null; 

     try { 
      if (input.hasNextLine()) { 
       personAdress = input.nextLine(); 
      } else { 
       System.err.println(VALID_ADDRESS); 
      } 
     } catch (InputMismatchException e) { 
      System.err.println(VALID_INPUT); 
     } catch (NoSuchElementException e) { 
      System.err.println(VALID_INPUT); 
     } catch (IllegalStateException e) { 
      System.err.println(VALID_INPUT); 
     } 

     return personAdress; 
    } 

    public static long inputID() { 

     long ID = 0; 
     try { 
      if (input.hasNextLong()) { 
       ID = input.nextLong(); 
      } else { 
       System.err.println(VALID_ID); 
      } 
     } catch (InputMismatchException e) { 
      System.err.println(VALID_INPUT); 
     } catch (NoSuchElementException e) { 
      System.err.println(VALID_INPUT); 
     } catch (IllegalStateException e) { 
      System.err.println(VALID_INPUT); 
     } 

     return ID; 
    } 

    public static String inputName() { 

     String personName = null; 
     try { 
      if (input.hasNextLine()) { 
       personName = input.nextLine(); 
      } else { 
       System.err.println(VALID_NAME); 
      } 
     } catch (InputMismatchException e) { 
      System.err.println(VALID_INPUT); 
     } catch (NoSuchElementException e) { 
      System.err.println(VALID_INPUT); 
     } catch (IllegalStateException e) { 
      System.err.println(VALID_INPUT); 
     } 

     return personName; 
    } 
} 

public static void main(String[] args) { 

     personName = Person.inputName(); 
     ID = Person.inputID(); 
     personAdress = Person.inputAdress(); 
     System.out.println(personName + " " + ID + " " + personAdress); 

    } 

的問題是，經過ID = Person.inputID（）;該程序終止並僅打印名稱和ID。 如果我最後調用inputID沒有問題。我試圖調試並且personAdress收到沒有任何輸入的空字符串。任何想法爲什麼？

Answer 1

這是完整的代碼？哪裏是變量的聲明，其中包含名稱地址和ID？我只看到他們聲明的方法 嘗試System.out.println（person.getName（）+ person.getID（）+ person.getaddress（））;