7.6实战练习
Juxing类的代码:
1 package org.hanqi.pn0120; 2 3 public class Juxing { 4 5 double chang; 6 double kuan; 7 Juxing(double chang,double kuan) 8 { 9 this.chang=chang; 10 this.kuan=kuan; 11 } 12 13 double mianji() 14 { 15 double s=chang*kuan; 16 return(s); 17 } 18 }
Test类的代码:
1 package org.hanqi.pn0120; 2 3 public class Test1 { 4 public static void main(String[] args) { 5 Juxing myjuxing=new Juxing(5d,10d); 6 7 System.out.println("矩形面积="+myjuxing.mianji()); 8 } 9 }
运行结果图: