package zuoye8; public abstract class Shape { private double zhouchang ; private double mianji ; public Shape(double zhouchang, double mianji) { super(); this.zhouchang = zhouchang; this.mianji = mianji; } public Shape() { super(); } //抽象一个周长方法 publi…

22．编写一个类A,该类创建的对象可以调用方法showA输出小写的英文字母表.然后再编写一个A类的子类B,子类B创建的对象不仅可以调用方法showA输出小写的英文字母表,而且可以调用子类新增的方法showB输出大写的英文字母表.最后编写主类C,在主类的main方法 中测试类A与类B. package jicheng; public class A { public void showA() { System.out.println("asdfsdf"); } } package jic…

package shape; public class Shape { //定义成员变量 private double zhouchang; private double mianji; public double getZhouchang() { return zhouchang; } public void setZhouchang(double zhouchang) { this.zhouchang = zhouchang; } public double getMianji() { re…

public class A { private int a=1; public int getA() { return a; } public void setA(int a) { this.a = a; } public void a() { System.out.println("a="+a); } public void c() { System.out.println("a-1="+(a-1)); } } package jicheng; public c…

///Animal类 package d922A; public class Animal { private String kind; public String getKind() { System.out.println(kind); return kind; } public void setKind(String kind) { this.kind = kind; } public void eat() { System.out.println("I can eat.");…

package zhongqiuzuoye; public class Car { String brand; public void drive() {} } package zhongqiuzuoye; public class Aodi extends Car{ public double price; public String model; public double speed; public Aodi(double price,String model,double speed)…

Ladder package com.hanqi.test; public class Ladder { //属性 double shangdi,xiadi,gao,mianji; //构造方法 Ladder(double sd,double xd,double g) { shangdi=sd; xiadi=xd; gao=g; mianji=(sd+xd)*g/2; } //成员方法 //返回面积 //返回类型 方法名(参数列表) double getMianJi() { //返回语句 ret…

//Vehicle类 package d922A; public class Vehicle { private int wheels; private double weight; Vehicle() { weight=1;wheels=4; } Vehicle(int lun, double zizhong) { wheels=lun; weight=zizhong; } public int getWheels() { return wheels; } public void setWhe…

//Monkey类 package d922; public class Monkey { Monkey() { } Monkey (String s) { System.out.println(s); } public void speak() { System.out.println("咿呀"); } } //人类 package d922; public class Mankind extends Monkey { public void speak() { System.out…

Print类: package com.bao; public class Print { int g,s,b; void outPut() { for(int i=100;i<1000;i++) {g=i%10; s=i/10%10; b=i/100; if(ggg+sss+bbb==i) {System.out.println(i);} } } } 主类E: package com.bao; public class E { public static void main(String[]…