package chap2;import java.util. Scanner;public class Exam2_ _8 { publicstatic void main(String[ args){ Scanner sC = newScanner(System.in); System.out.println("請(qǐng)輸入矩形的長(zhǎng): "); double a = sc.nextDouble(); System.out.println("請(qǐng)輸入矩形的寬: "); doubleb = sc.nextDouble(); double ZC = 2*(a+b); doublemj= a * b; System.out.printIn("矩形的周長(zhǎng) 是"+zc); System.out.println("矩形的面積是"+mj);