刚下了个新项目,跑了下maven报错了: E:\workspace\portalframe>mvn clean install [INFO] Scanning for projects... [WARNING] [WARNING] Some problems were encountered while building the effective model for com.migu.reading.portalFrame:ues:war:trunk-SNAPSHOT [WARNING] ,
创建如下三个类:(People类中的三个方法分别输出一些信息,ChinaPeople 和AmericanPeople类重写父类的三个方法). ackage com.chuoji.text01; public class People { protected double height; protected double weight; public double getHeight() { return height; } public void setHeight(double height)
#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
实现如下类之间的继承关系,并编写Music类来测试这些类. package com.hanqi.test; public class Instrument { //输出弹奏乐器 public void play() { System.out.println("弹奏乐器"); } } package com.hanqi.test; public class Wind extends Instrument { //弹奏wind public void play() { System.out