如何在循環外部使用BufferedReader從鍵盤輸入數據？

Question

InputStreamReader inp= new InputStreamReader(System.in); 
do 
{ 
    BufferedReader br = new BufferedReader(inp); 
    System.out.println("Enter Roll number : "); 
    int rno= Integer.parseInt(br.readLine()); 

    System.out.println("Enter name: "); 
    String name= br.readLine(); 

    System.out.println("Continue y/n: "); 
    char ans=(char)br.read(); 
} while(ans=='y');  

如何在環路外寫BufferedReader？如果我外面使用它，它顯示了以下異常：

java.lang.numberformatexception for input string at    
    java.lang.Integer.parseInt(Integer.java:468) 

是否有任何機制來刷新BufferedReader？可以做些什麼？

Answer 1

這不是「好」，但我的工作 - 我加br.readLine（）：

public static void main(String args[]) throws IOException { 
    BufferedReader br = null; 
    try { 
     InputStreamReader inp = new InputStreamReader(System.in); 
     br = new BufferedReader(inp); 
     char ans; 
     do { 
      System.out.println("Enter Roll number : "); 
      int rno = Integer.parseInt(br.readLine()); 

      System.out.println("Enter name: "); 
      String name = br.readLine(); 

      System.out.println("Continue y/n: "); 
      ans = (char) br.read(); 
      br.readLine(); 
     } while (ans == 'y'); 
    } finally { 
     if (br != null) { 
      br.close(); 
     } 
    } 
}