JAVA簡單的鍵盤輸入

來源:互聯網
上載者:User
import java.util.Scanner;

public class Jieshou ...{

    public static void main(String[] args) throws Exception ...{

        Scanner in = new Scanner(System.in);

        while (true) ...{                                   //設計一個迴圈                          
            try ...{

                System.out.println("請輸入一個(1-100)之間的整形數:");

                int Temp = Integer.parseInt(in.nextLine());    //從鍵盤接收一個數

                if (Temp < 1 || Temp > 100)             //約定 必須是1-100之間的數
                                                                                    ...{
                                                                                          System.out.println("對不起,你輸入錯誤!");
                                                                                           throw new RuntimeException();
                                                                                    }

                                

                System.out.println("恭喜~!終於對了,你輸入的是:" + Temp);
                 break;                               //退出迴圈
            }

            catch (RuntimeException e) ...{

                System.out.println("請確認您老人家輸入的是一個整數!");
            }

        }

    }

}

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