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楼主，程序如下：
测试62616964757a686964616fe4b893e5b19e31333332636430类：
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class ShapeSystem {
static List sList = new ArrayList();
static float square = 0;
public static void main(String[] args) {
while(true)
{
show();
}
}
public static void show()
{
print("***图形类对象的管理***", 1);
print("-------------------", 1);
print("1.创建一个圆", 1);
print("2.创建一个矩形", 1);
print("3.创建一个长方体", 1);
print("4.创建一个圆柱体", 1);
print("5.显示已经创建的图形", 1);
print("6.求各图形的面积之和", 1);
print("7.退出系统", 1);
print("请选择操作项：", 2);
Scanner scanner = new Scanner(System.in);
int action = 0;
try {
action = scanner.nextInt();
} catch (RuntimeException e) {
print("输入必须是整数!", 1);
}
float pi = 3.14f;
String name = "";
float x;
float y;
float h;
float r;
switch (action) {
case 1:
print("请输入圆的名称：", 2);
name = scanner.next();
print("请输入圆心x坐标：", 2);
x = scanner.nextInt();
print("请输入圆心y坐标：", 2);
y = scanner.nextInt();
print("请输入圆的半径：", 2);
r = scanner.nextFloat();
Circle c = new Circle(name,x,y,r);
sList.add(c);
square += pi*r*r;
break;
case 2:
print("请输入矩形的名称：", 2);
name = scanner.next();
print("请输入矩形的长：", 2);
x = scanner.nextInt();
print("请输入矩形的宽：", 2);
y = scanner.nextInt();
Rectangle ra = new Rectangle(name,x,y);
sList.add(ra);
square += x*y;
break;
case 3:
print("请输入长方体的名称：", 2);
name = scanner.next();
print("请输入长方体的长：", 2);
x = scanner.nextInt();
print("请输入长方体的宽：", 2);
y = scanner.nextInt();
print("请输入长方体的高：", 2);
h = scanner.nextInt();
Cube cb = new Cube(name,x,y,h);
sList.add(cb);
square += 2*x*y + 2*x*h +2*h*y;
break;
case 4:
print("请输入圆柱体的名称：", 2);
name = scanner.next();
print("请输入圆柱体的底圆心x坐标：", 2);
x = scanner.nextInt();
print("请输入圆柱体的底圆心y坐标：", 2);
y = scanner.nextInt();
print("请输入圆柱体的底圆的半径：", 2);
r = scanner.nextFloat();
print("请输入圆柱体的高：", 2);
h = scanner.nextFloat();
Clinder ccd = new Clinder(name,x,y,r,h);
sList.add(ccd);
square += 2*pi*r*h;
break;
case 5:
for(Shape s : sList)
{
print(s.getName(), 1);
}
break;
case 6:
print("各图形的面积和为："+square, 1);
break;
case 7:
print("系统退出...", 1);
System.exit(0);
break;
default:
print("无效的操作项...", 1);
break;
}
}
public static void print(String info,int flag)
{
if(flag == 1)
{
System.out.println(info);
}
else
{
System.out.print(info);
}
}
}
=========================华丽的分割线=============================
图形Shape类：
public abstract class Shape {
private String name;
public Shape(String name)
{
this.name = name;
}
public abstract void show();
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
=========================华丽的分割线=============================
矩形类：
public class Rectangle extends Shape {
private float x;
private float y;
public Rectangle(String name,float x,float y) {
super(name);
this.x = x;
this.y = y;
}
@Override
public void show() {
System.out.println(this.getName());
}
public String toString()
{
return this.getName() + "：长=" + this.x + " 宽=" + this.y;
}
public float getX() {
return x;
}
public void setX(float x) {
this.x = x;
}
public float getY() {
return y;
}
public void setY(float y) {
this.y = y;
}
}
}
=========================华丽的分割线=============================
长方体为：
public class Cube extends Rectangle {
private float h;
public Cube(String name,float x,float y,float h) {
super(name,x,y);
this.h = h;
}
@Override
public void show() {
System.out.println(this.getName());
}
public String toString()
{
return this.getName() + "：长=" + this.getX() + " 宽=" + this.getY() + " 高=" + this.h;
}
}
=========================华丽的分割线=============================
圆：
public class Circle extends Shape {
private float x;
private float y;
private float r;
public Circle(String name, float x, float y, float r) {
super(name);
this.x = x;
this.y = y;
this.r = r;
}
@Override
public void show() {
System.out.println(this.getName());
}
public float getX() {
return x;
}
public void setX(float x) {
this.x = x;
}
public float getY() {
return y;
}
public void setY(float y) {
this.y = y;
}
public float getR() {
return r;
}
public void setR(float r) {
this.r = r;
}
public String toString()
{
return this.getName() + "：圆心x=" + this.x + " y=" + this.y + " 半径=" + this.r;
}
}
=========================华丽的分割线=============================
圆柱体：
public class Clinder extends Circle {
private float h;
public Clinder(String name, float x, float y, float r,float h) {
super(name, x, y, r);
this.h = h;
}
@Override
public void show() {
System.out.println(this.getName());
}
public String toString()
{
return this.getName() + "：圆心x=" + this.getX() + " y=" + this.getY() + " 半径=" + this.getR() + " 高=" + this.h;
}
}
程序运行效果图：
具体请自行运行程序操作，细节部分需自己完善。
有问题欢迎提问，满意请采纳！有分就加点，谢谢！