java实现图形卡片排序游戏

java实现图形卡片排序游戏

本文实例为大家分享了java实现图形卡片排序游戏的具体代码，供大家参考，具体内容如下

掌握类的继承、多态性使用方法以及接口的应用。

输入格式:

首先，在一行上输入一串数字（1~4，整数），其中，1代表圆形卡片，2代表矩形卡片，3代表三角形卡片，4代表梯形卡片。各数字之间以一个或多个空格分隔，以“0”结束。例如： 1 3 4 2 1 3 4 2 1 3 0

然后根据第一行数字所代表的卡片图形类型，依次输入各图形的相关参数，例如：圆形卡片需要输入圆的半径，矩形卡片需要输入矩形的宽和长，三角形卡片需要输入三角形的三条边长，梯形需要输入梯形的上底、下底以及高。各数据之间用一个或多个空格分隔。

输出格式:

如果图形数量非法（小于0）或图形属性值非法（数值小于0以及三角形三边不能组成三角形），则输出Wrong Format。

如果输入合法，则正常输出，所有数值计算后均保留小数点后两位即可。输出内容如下：

排序前的各图形类型及面积，格式为图形名称1:面积值1图形名称2:面积值2 …图形名称n:面积值n，注意，各图形输出之间用空格分开，且输出最后存在一个用于分隔的空格；

排序后的各图形类型及面积，格式同排序前的输出；

所有图形的面积总和，格式为Sum of area:总面积值。

输入样例1:

在这里给出一组输入。例如：

1 5 3 2 0

输出样例1:

在这里给出相应的输出。例如：

Wrong Format

输入样例2:

在这里给出一组输入。例如：

4 2 1 3 0

3.2 2.5 0.4 2.3 1.4 5.6 2.3 4.2 3.5

输出样例2:

在这里给出相应的输出。例如：

The original list:

Trapezoid:1.14 Rectangle:3.22 Circle:98.52 Triangle:4.02

The sorted list:

Circle:98.52 Triangle:4.02 Rectangle:3.22 Trapezoid:1.14

Sum of area:106.91

输入样例3:

在这里给出一组输入。例如：

4 2 1 3 0

3.2 2.5 0.4 2.3 1.4 5.6 2.3 4.2 8.4

输出样例3:

在这里给出相应的输出。例如：

Wrong Format

参考代码如下：

import java.util.ArrayList;

import java.util.Collections;

import java.util.Scanner;

public class Main {

//在Main类中定义一个静态Scanner对象，这样在其它类中如果想要使用该对象进行输入，则直接

//使用Main.input.next…即可（避免采坑）

public static Scanner input = new Scanner(System.in);

public static void main(String[] args){

ArrayList list = new ArrayList();

int num = input.nextInt();

while(num != 0){

if(num < 0 || num > 4){

System.out.println("Wrong Format");

System.exit(0);

}

list.add(num);

num = input.nextInt();

}

DealCardList dealCardList = new DealCardList(list);

if(!dealCardList.validate()){

System.out.println("Wrong Format");

System.exit(0);

}

dealCardList.showResult();

input.close();

}

}

class Card{

Shape shape;

Card(){

}

Card(Shape shape){

this.shape=shape;

}

public Shape getShape() {

return shape;

}

public void setShape(Shape Shapehttp://) {

this.shape=shape;

}

}

class DealCardList{

ArrayList cardList=new ArrayList();

DealCardList(){

}

DealCardList(ArrayList list){

for(int i=0;i

{

if(list.get(i)==1)

{

double r=Main.input.nextDouble();

Circle circle=new Circle(r);

Card card=new Card(circle);

card.getShape().setShapeName("Circle");

cardList.add(card);

}

if(list.get(i)==2) {

double a=Main.input.nextDouble();

double b=Main.input.nextDouble();

Rectangle rectangle=new Rectangle(a,b);

Card card=new Card(rectangle);

card.getShape().setShapeName("Rectangle");

cardList.add(card);

}

if(list.get(i)==3) {

double a=Main.input.nextDouble();

double b=Main.input.nextDouble();

double c=Main.input.nextDouble();

Triangle triangle=new Triangle(a,b,c);

Card card=new Card(triangle);

card.getShape().setShapeName("Triangle");

cardList.add(card);

}

if(list.get(i)==4) {

double a=Main.input.nextDouble();

double b=Main.input.nextDouble();

double c=Main.input.nextDouble();

Traperoid traperoid=new Traperoid(a,b,c);

Card card=new Card(traperoid);

card.getShape().setShapeName("Trapezoid");

cardList.add(card);

}

}

}

public boolean validate() {

for(int i=0;i

{if(!cardList.get(i).getShape().vaildate())

return false;}

return true;

}

public void cardSort() {

for(int k=0;k

for(int i=k+1;i

{

if(cardList.get(k).getShape().getArea()&lhttp://t;cardList.get(i).getShape().getArea())

Collections.swap(cardList, k, i);

}

}

public double getAllArea() {

double s=0;

for(int i=0;i

s=s+cardList.get(i).getShape().getArea();

return s;

}

public void showResult() {

System.out.println("The original list:");

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("The sorted list:");

cardSort();

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("Sum of area:"+String.format("%.2f",getAllArea()));

}

}

class Shape {

private String shapeName;

Shape(){

}

Shape(String shapeName){

this.shapeName=shapeName;

}

public String getShapeName() {

return shapeName;

}

public void setShapeName(String shapeName) {

this.shapeName=shapeName;

}

public double getArea() {

return 0.0;

}

public boolean vaildate() {

return true;

}

}

class Circle extends Shape{

private double radius;

Circle(){

}

Circle(double radius){

this.radius=radius;

}

public double getArea() {

return Math.PI*radius*radius;

}

public boolean vaildate() {

if(radius>0)

return true;

else return false;

}

}

class Rectangle extends Shape{

private double width,length;

Rectangle (double width,double length){

this.width=width;

this.length=length;

}

public double getArea() {

return width*length;

}

public boolean vaildate() {

if(width>0&&length>0)

return true;

else return false;

}

}

class Triangle extends Shape{

double side1,side2,side3;

Triangle(double side1,double side2,double side3){

this.side1=side1;

this.side2=side2;

this.side3=side3;

}

public double getArea() {

double c=(side1+side2+side3)/2;

double s=Math.sqrt(c*(c-side1)*(c-side2)*(c-side3));

return s;

}

public boolean vaildate() {

if(side1+side2>side3&&side1+side3>side2&&side2+side3>side1)

return true;

else

return false;

}

}

class Traperoid extends Shape{

private double topSide,bottomSide,height;

Traperoid(){

}

Traperoid(double topSide,double bottomSide,double height){

this.bottomSide=bottomSide;

this.height=height;

this.topSide=topSide;

}

public double getArea() {

return (topSide+bottomSide)*height/2;

}

public boolean validate() {

if(topSide>0&&bottomSide>0&&height>0)

return true;

else return false;

}

}

{

if(list.get(i)==1)

{

double r=Main.input.nextDouble();

Circle circle=new Circle(r);

Card card=new Card(circle);

card.getShape().setShapeName("Circle");

cardList.add(card);

}

if(list.get(i)==2) {

double a=Main.input.nextDouble();

double b=Main.input.nextDouble();

Rectangle rectangle=new Rectangle(a,b);

Card card=new Card(rectangle);

card.getShape().setShapeName("Rectangle");

cardList.add(card);

}

if(list.get(i)==3) {

double a=Main.input.nextDouble();

double b=Main.input.nextDouble();

double c=Main.input.nextDouble();

Triangle triangle=new Triangle(a,b,c);

Card card=new Card(triangle);

card.getShape().setShapeName("Triangle");

cardList.add(card);

}

if(list.get(i)==4) {

double a=Main.input.nextDouble();

double b=Main.input.nextDouble();

double c=Main.input.nextDouble();

Traperoid traperoid=new Traperoid(a,b,c);

Card card=new Card(traperoid);

card.getShape().setShapeName("Trapezoid");

cardList.add(card);

}

}

}

public boolean validate() {

for(int i=0;i

{if(!cardList.get(i).getShape().vaildate())

return false;}

return true;

}

public void cardSort() {

for(int k=0;k

for(int i=k+1;i

{

if(cardList.get(k).getShape().getArea()&lhttp://t;cardList.get(i).getShape().getArea())

Collections.swap(cardList, k, i);

}

}

public double getAllArea() {

double s=0;

for(int i=0;i

s=s+cardList.get(i).getShape().getArea();

return s;

}

public void showResult() {

System.out.println("The original list:");

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("The sorted list:");

cardSort();

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("Sum of area:"+String.format("%.2f",getAllArea()));

}

}

class Shape {

private String shapeName;

Shape(){

}

Shape(String shapeName){

this.shapeName=shapeName;

}

public String getShapeName() {

return shapeName;

}

public void setShapeName(String shapeName) {

this.shapeName=shapeName;

}

public double getArea() {

return 0.0;

}

public boolean vaildate() {

return true;

}

}

class Circle extends Shape{

private double radius;

Circle(){

}

Circle(double radius){

this.radius=radius;

}

public double getArea() {

return Math.PI*radius*radius;

}

public boolean vaildate() {

if(radius>0)

return true;

else return false;

}

}

class Rectangle extends Shape{

private double width,length;

Rectangle (double width,double length){

this.width=width;

this.length=length;

}

public double getArea() {

return width*length;

}

public boolean vaildate() {

if(width>0&&length>0)

return true;

else return false;

}

}

class Triangle extends Shape{

double side1,side2,side3;

Triangle(double side1,double side2,double side3){

this.side1=side1;

this.side2=side2;

this.side3=side3;

}

public double getArea() {

double c=(side1+side2+side3)/2;

double s=Math.sqrt(c*(c-side1)*(c-side2)*(c-side3));

return s;

}

public boolean vaildate() {

if(side1+side2>side3&&side1+side3>side2&&side2+side3>side1)

return true;

else

return false;

}

}

class Traperoid extends Shape{

private double topSide,bottomSide,height;

Traperoid(){

}

Traperoid(double topSide,double bottomSide,double height){

this.bottomSide=bottomSide;

this.height=height;

this.topSide=topSide;

}

public double getArea() {

return (topSide+bottomSide)*height/2;

}

public boolean validate() {

if(topSide>0&&bottomSide>0&&height>0)

return true;

else return false;

}

}

{if(!cardList.get(i).getShape().vaildate())

return false;}

return true;

}

public void cardSort() {

for(int k=0;k

for(int i=k+1;i

{

if(cardList.get(k).getShape().getArea()&lhttp://t;cardList.get(i).getShape().getArea())

Collections.swap(cardList, k, i);

}

}

public double getAllArea() {

double s=0;

for(int i=0;i

s=s+cardList.get(i).getShape().getArea();

return s;

}

public void showResult() {

System.out.println("The original list:");

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("The sorted list:");

cardSort();

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("Sum of area:"+String.format("%.2f",getAllArea()));

}

}

class Shape {

private String shapeName;

Shape(){

}

Shape(String shapeName){

this.shapeName=shapeName;

}

public String getShapeName() {

return shapeName;

}

public void setShapeName(String shapeName) {

this.shapeName=shapeName;

}

public double getArea() {

return 0.0;

}

public boolean vaildate() {

return true;

}

}

class Circle extends Shape{

private double radius;

Circle(){

}

Circle(double radius){

this.radius=radius;

}

public double getArea() {

return Math.PI*radius*radius;

}

public boolean vaildate() {

if(radius>0)

return true;

else return false;

}

}

class Rectangle extends Shape{

private double width,length;

Rectangle (double width,double length){

this.width=width;

this.length=length;

}

public double getArea() {

return width*length;

}

public boolean vaildate() {

if(width>0&&length>0)

return true;

else return false;

}

}

class Triangle extends Shape{

double side1,side2,side3;

Triangle(double side1,double side2,double side3){

this.side1=side1;

this.side2=side2;

this.side3=side3;

}

public double getArea() {

double c=(side1+side2+side3)/2;

double s=Math.sqrt(c*(c-side1)*(c-side2)*(c-side3));

return s;

}

public boolean vaildate() {

if(side1+side2>side3&&side1+side3>side2&&side2+side3>side1)

return true;

else

return false;

}

}

class Traperoid extends Shape{

private double topSide,bottomSide,height;

Traperoid(){

}

Traperoid(double topSide,double bottomSide,double height){

this.bottomSide=bottomSide;

this.height=height;

this.topSide=topSide;

}

public double getArea() {

return (topSide+bottomSide)*height/2;

}

public boolean validate() {

if(topSide>0&&bottomSide>0&&height>0)

return true;

else return false;

}

}

for(int i=k+1;i

{

if(cardList.get(k).getShape().getArea()&lhttp://t;cardList.get(i).getShape().getArea())

Collections.swap(cardList, k, i);

}

}

public double getAllArea() {

double s=0;

for(int i=0;i

s=s+cardList.get(i).getShape().getArea();

return s;

}

public void showResult() {

System.out.println("The original list:");

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("The sorted list:");

cardSort();

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("Sum of area:"+String.format("%.2f",getAllArea()));

}

}

class Shape {

private String shapeName;

Shape(){

}

Shape(String shapeName){

this.shapeName=shapeName;

}

public String getShapeName() {

return shapeName;

}

public void setShapeName(String shapeName) {

this.shapeName=shapeName;

}

public double getArea() {

return 0.0;

}

public boolean vaildate() {

return true;

}

}

class Circle extends Shape{

private double radius;

Circle(){

}

Circle(double radius){

this.radius=radius;

}

public double getArea() {

return Math.PI*radius*radius;

}

public boolean vaildate() {

if(radius>0)

return true;

else return false;

}

}

class Rectangle extends Shape{

private double width,length;

Rectangle (double width,double length){

this.width=width;

this.length=length;

}

public double getArea() {

return width*length;

}

public boolean vaildate() {

if(width>0&&length>0)

return true;

else return false;

}

}

class Triangle extends Shape{

double side1,side2,side3;

Triangle(double side1,double side2,double side3){

this.side1=side1;

this.side2=side2;

this.side3=side3;

}

public double getArea() {

double c=(side1+side2+side3)/2;

double s=Math.sqrt(c*(c-side1)*(c-side2)*(c-side3));

return s;

}

public boolean vaildate() {

if(side1+side2>side3&&side1+side3>side2&&side2+side3>side1)

return true;

else

return false;

}

}

class Traperoid extends Shape{

private double topSide,bottomSide,height;

Traperoid(){

}

Traperoid(double topSide,double bottomSide,double height){

this.bottomSide=bottomSide;

this.height=height;

this.topSide=topSide;

}

public double getArea() {

return (topSide+bottomSide)*height/2;

}

public boolean validate() {

if(topSide>0&&bottomSide>0&&height>0)

return true;

else return false;

}

}

{

if(cardList.get(k).getShape().getArea()&lhttp://t;cardList.get(i).getShape().getArea())

Collections.swap(cardList, k, i);

}

}

public double getAllArea() {

double s=0;

for(int i=0;i

s=s+cardList.get(i).getShape().getArea();

return s;

}

public void showResult() {

System.out.println("The original list:");

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("The sorted list:");

cardSort();

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("Sum of area:"+String.format("%.2f",getAllArea()));

}

}

class Shape {

private String shapeName;

Shape(){

}

Shape(String shapeName){

this.shapeName=shapeName;

}

public String getShapeName() {

return shapeName;

}

public void setShapeName(String shapeName) {

this.shapeName=shapeName;

}

public double getArea() {

return 0.0;

}

public boolean vaildate() {

return true;

}

}

class Circle extends Shape{

private double radius;

Circle(){

}

Circle(double radius){

this.radius=radius;

}

public double getArea() {

return Math.PI*radius*radius;

}

public boolean vaildate() {

if(radius>0)

return true;

else return false;

}

}

class Rectangle extends Shape{

private double width,length;

Rectangle (double width,double length){

this.width=width;

this.length=length;

}

public double getArea() {

return width*length;

}

public boolean vaildate() {

if(width>0&&length>0)

return true;

else return false;

}

}

class Triangle extends Shape{

double side1,side2,side3;

Triangle(double side1,double side2,double side3){

this.side1=side1;

this.side2=side2;

this.side3=side3;

}

public double getArea() {

double c=(side1+side2+side3)/2;

double s=Math.sqrt(c*(c-side1)*(c-side2)*(c-side3));

return s;

}

public boolean vaildate() {

if(side1+side2>side3&&side1+side3>side2&&side2+side3>side1)

return true;

else

return false;

}

}

class Traperoid extends Shape{

private double topSide,bottomSide,height;

Traperoid(){

}

Traperoid(double topSide,double bottomSide,double height){

this.bottomSide=bottomSide;

this.height=height;

this.topSide=topSide;

}

public double getArea() {

return (topSide+bottomSide)*height/2;

}

public boolean validate() {

if(topSide>0&&bottomSide>0&&height>0)

return true;

else return false;

}

}

s=s+cardList.get(i).getShape().getArea();

return s;

}

public void showResult() {

System.out.println("The original list:");

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("The sorted list:");

cardSort();

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("Sum of area:"+String.format("%.2f",getAllArea()));

}

}

class Shape {

private String shapeName;

Shape(){

}

Shape(String shapeName){

this.shapeName=shapeName;

}

public String getShapeName() {

return shapeName;

}

public void setShapeName(String shapeName) {

this.shapeName=shapeName;

}

public double getArea() {

return 0.0;

}

public boolean vaildate() {

return true;

}

}

class Circle extends Shape{

private double radius;

Circle(){

}

Circle(double radius){

this.radius=radius;

}

public double getArea() {

return Math.PI*radius*radius;

}

public boolean vaildate() {

if(radius>0)

return true;

else return false;

}

}

class Rectangle extends Shape{

private double width,length;

Rectangle (double width,double length){

this.width=width;

this.length=length;

}

public double getArea() {

return width*length;

}

public boolean vaildate() {

if(width>0&&length>0)

return true;

else return false;

}

}

class Triangle extends Shape{

double side1,side2,side3;

Triangle(double side1,double side2,double side3){

this.side1=side1;

this.side2=side2;

this.side3=side3;

}

public double getArea() {

double c=(side1+side2+side3)/2;

double s=Math.sqrt(c*(c-side1)*(c-side2)*(c-side3));

return s;

}

public boolean vaildate() {

if(side1+side2>side3&&side1+side3>side2&&side2+side3>side1)

return true;

else

return false;

}

}

class Traperoid extends Shape{

private double topSide,bottomSide,height;

Traperoid(){

}

Traperoid(double topSide,double bottomSide,double height){

this.bottomSide=bottomSide;

this.height=height;

this.topSide=topSide;

}

public double getArea() {

return (topSide+bottomSide)*height/2;

}

public boolean validate() {

if(topSide>0&&bottomSide>0&&height>0)

return true;

else return false;

}

}

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("The sorted list:");

cardSort();

for(int i=0;i

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("Sum of area:"+String.format("%.2f",getAllArea()));

}

}

class Shape {

private String shapeName;

Shape(){

}

Shape(String shapeName){

this.shapeName=shapeName;

}

public String getShapeName() {

return shapeName;

}

public void setShapeName(String shapeName) {

this.shapeName=shapeName;

}

public double getArea() {

return 0.0;

}

public boolean vaildate() {

return true;

}

}

class Circle extends Shape{

private double radius;

Circle(){

}

Circle(double radius){

this.radius=radius;

}

public double getArea() {

return Math.PI*radius*radius;

}

public boolean vaildate() {

if(radius>0)

return true;

else return false;

}

}

class Rectangle extends Shape{

private double width,length;

Rectangle (double width,double length){

this.width=width;

this.length=length;

}

public double getArea() {

return width*length;

}

public boolean vaildate() {

if(width>0&&length>0)

return true;

else return false;

}

}

class Triangle extends Shape{

double side1,side2,side3;

Triangle(double side1,double side2,double side3){

this.side1=side1;

this.side2=side2;

this.side3=side3;

}

public double getArea() {

double c=(side1+side2+side3)/2;

double s=Math.sqrt(c*(c-side1)*(c-side2)*(c-side3));

return s;

}

public boolean vaildate() {

if(side1+side2>side3&&side1+side3>side2&&side2+side3>side1)

return true;

else

return false;

}

}

class Traperoid extends Shape{

private double topSide,bottomSide,height;

Traperoid(){

}

Traperoid(double topSide,double bottomSide,double height){

this.bottomSide=bottomSide;

this.height=height;

this.topSide=topSide;

}

public double getArea() {

return (topSide+bottomSide)*height/2;

}

public boolean validate() {

if(topSide>0&&bottomSide>0&&height>0)

return true;

else return false;

}

}

System.out.print(cardList.get(i).getShape().getShapeName()+":"+String.format("%.2f",cardList.get(i).getShape().getArea())+" ");

System.out.println();

System.out.println("Sum of area:"+String.format("%.2f",getAllArea()));

}

}

class Shape {

private String shapeName;

Shape(){

}

Shape(String shapeName){

this.shapeName=shapeName;

}

public String getShapeName() {

return shapeName;

}

public void setShapeName(String shapeName) {

this.shapeName=shapeName;

}

public double getArea() {

return 0.0;

}

public boolean vaildate() {

return true;

}

}

class Circle extends Shape{

private double radius;

Circle(){

}

Circle(double radius){

this.radius=radius;

}

public double getArea() {

return Math.PI*radius*radius;

}

public boolean vaildate() {

if(radius>0)

return true;

else return false;

}

}

class Rectangle extends Shape{

private double width,length;

Rectangle (double width,double length){

this.width=width;

this.length=length;

}

public double getArea() {

return width*length;

}

public boolean vaildate() {

if(width>0&&length>0)

return true;

else return false;

}

}

class Triangle extends Shape{

double side1,side2,side3;

Triangle(double side1,double side2,double side3){

this.side1=side1;

this.side2=side2;

this.side3=side3;

}

public double getArea() {

double c=(side1+side2+side3)/2;

double s=Math.sqrt(c*(c-side1)*(c-side2)*(c-side3));

return s;

}

public boolean vaildate() {

if(side1+side2>side3&&side1+side3>side2&&side2+side3>side1)

return true;

else

return false;

}

}

class Traperoid extends Shape{

private double topSide,bottomSide,height;

Traperoid(){

}

Traperoid(double topSide,double bottomSide,double height){

this.bottomSide=bottomSide;

this.height=height;

this.topSide=topSide;

}

public double getArea() {

return (topSide+bottomSide)*height/2;

}

public boolean validate() {

if(topSide>0&&bottomSide>0&&height>0)

return true;

else return false;

}

}

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