#29．编写一个Java应用程序,设计一个汽车类Vehicle,包含的属性有车轮个数 wheels和车重weight.小车类Car是Vehicle的子类,其中包含的属性有载人数 loader.卡车类Truck是Car类的子类,其中包含的属性有载重量payload.每个 类都有构造方法和输出相关数据的方法.最后,写一个测试类来测试这些类的功 能. package hanqi; public class Vehicle { private int wheels; private int weight
package car; public class Vehicle { //定义成员变量 private int wheels; private double weight; public int getWheels() { return wheels; } public void setWheels(int wheels) { this.wheels = wheels; } public double getWeight() { return weight; } public void set
package zhongqiuzuoye; //自己写的方法 public class Rect { public double width; public double height; Rect(double width,double height) //带有两个参数的构造方法,用于将width和height属性初化; { this.width=width; this.height=height; } Rect() //不带参数的构造方法,将矩形初始化为宽和高都为10. { width=10
package com.hanqi.test; public class Rect { ; ; public double getWidth() { return width; } public void setWidth(double width) { this.width = width; } public double getHeight() { return height; } public void setHeight(double height) { this.height = he
package a; public interface CentralPartyCommittee { void partyLeader(); } package a; public abstract class StateCouncil{ abstract void safetyInProduction(); } package a; public class Province extends StateCouncil implements CentralPartyCommittee { pu
package homework1; public class Monkey { //构造方法 Monkey(String s) { } //成员方法 public void speak() { System.out.println("咿咿呀呀......"); } } package homework1; public class People extends Monkey { //构造方法 People(String s) { super(s); } //重写父类方法speak p
