我想了解如何只接受來自用戶的數字,並且我試圖使用try catch塊來這樣做,但我仍然會遇到錯誤。Java只接受用戶使用掃描器的號碼
Scanner scan = new Scanner(System.in);
boolean bidding;
int startbid;
int bid;
bidding = true;
System.out.println("Alright folks, who wants this unit?" +
"\nHow much. How much. How much money where?");
startbid = scan.nextInt();
try{
while(bidding){
System.out.println("$" + startbid + "! Whose going to bid higher?");
startbid =+ scan.nextInt();
}
}catch(NumberFormatException nfe){
System.out.println("Please enter a bid");
}
我想了解爲什麼它不工作。
我通過輸入到控制檯進行測試,我會收到一個錯誤,而不是有希望的「請輸入出價」解決方案。
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:909)
at java.util.Scanner.next(Scanner.java:1530)
at java.util.Scanner.nextInt(Scanner.java:2160)
at java.util.Scanner.nextInt(Scanner.java:2119)
at Auction.test.main(test.java:25)
謝謝!我會記得使用nextLine()和parseInt() – Streak324 2012-01-01 23:29:52