import java.io.*; public class J2_4_4 { public static void main(String[] args) throws IOException { BufferedReader keyin; keyin = new BufferedReader(new InputStreamReader(System.in)); System.out.print("輸入整數字串: "); String st = keyin.readLine(); int num = Integer.parseInt(st); System.out.println("顯示整數數值: " + num); } }