[英]How to use BufferedReader outside the loop for taking input from keyboard?
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');
如何在循環外編寫BufferedReader
? 如果我在外面使用它,它將顯示以下異常:
java.lang.numberformatexception for input string at
java.lang.Integer.parseInt(Integer.java:468)
是否有任何刷新BufferedReader
機制? 可以做什么?
它不是'nice'而是對我有用-我添加了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();
}
}
}
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