妳好，程序如下:導入Java . io . *；public class b { public static double sqrt(int I){ return math . sqrt(I)；} public static void main(String[]args)拋出io exception { buffered reader bfr = new buffered reader(new InputStreamReader(system . in))；System.out.println("請輸入壹個數字:")；string str = bfr . readline()；int I = integer . parse int(str)；double j = b . sqrt(I)；System.out.println(i+)的根等於:“+j”)；}}有問題請提出，望采納。
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