廣東海洋大學(xué)實(shí)驗(yàn)類的綜合應(yīng)用 計(jì)科

1、實(shí)驗(yàn)六 類的綜合應(yīng)用實(shí)驗(yàn)?zāi)康模海?）掌握類的繼承，實(shí)現(xiàn)構(gòu)造函數(shù)的繼承。（2）多態(tài)，通過(guò)相同的方法名實(shí)現(xiàn)不同的功能以及通過(guò)上型轉(zhuǎn)換實(shí)現(xiàn)多態(tài)。實(shí)驗(yàn)內(nèi)容：1、 有一個(gè)shape接口，利用該接口來(lái)編寫圓柱體，圓錐，長(zhǎng)方體，和正方體的表面積與體積的應(yīng)用程序（其中正方體是長(zhǎng)方體的子類，圓錐是圓柱的子類），要求接口回調(diào)技術(shù)來(lái)求這些幾何圖形的體積和表面積。Interface shapePublic double vol();/體積Public double area();/表面積2 有一個(gè)抽象類CompareObject,其中定義一個(gè)抽象方法abstract int compareTo(Object obj)

2、用于比較兩個(gè)對(duì)象。然后設(shè)計(jì)一個(gè)類Posisition從CompareObject類派生，該類有x和y兩個(gè)成員變量表示坐標(biāo)，該類實(shí)現(xiàn)compareTo()方法，用比較兩個(gè)Posisition對(duì)象到原點(diǎn)（0，0）的距離之差。代碼1、public class sy6666611111111 public static void main(String args) Cuboid cuboid = new Cuboid(2,3,4);System.out.println("長(zhǎng)，寬，高為2，3，4的長(zhǎng)方體的體積是："+cuboid.vol();System.out.println(&q

3、uot;長(zhǎng)，寬，高為2，3，4的長(zhǎng)方體的表面積是："+cuboid.area();Cube cube = new Cube(2);System.out.println("邊長(zhǎng)為2的正方體的體積是："+cube.vol();System.out.println("邊長(zhǎng)為2的正方體的表面積是："+cube.area();circularCylinder circular = new circularCylinder(3,5);System.out.println("半徑為3，高為5的圓柱的體積是："+circular.vol()

4、;System.out.println("半徑為3，高為5的圓柱的表面積是："+circular.area();Cone cone = new Cone(3,4);System.out.println("半徑為3，高為5的圓錐的體積是："+cone.vol();System.out.println("半徑為3，高為5的圓錐的表面積是："+cone.area();Ball ball = new Ball(5);System.out.println("半徑為5的球的體積："+ball.vol();System.out.

5、println("半徑為5的球的表面積："+ball.area();interface shape public double vol(); /體積public double area(); /表面積class Cuboid implements shape /長(zhǎng)方體double a,b,c;Cuboid()Cuboid(double a,double b,double c)this.a = a;this.b = b;this.c = c;public double vol()double v = a*b*c;return v;public double area() do

6、uble s = 2*(a*b+b*c+a*c);return s;class Cube extends Cuboid /正方體Cube(double a)this.a = a;this.b = a;this.c = a;class circularCylinder implements shape /圓柱double radius;double height;circularCylinder()circularCylinder(double r,double h) this.radius = r;this.height = h;public double vol()double v = 3.

7、14*radius*radius*height;return v;public double area() double a = 3.14*radius*radius;double b = 2*3.14*radius*height;double s = b+2*a;return s;class Cone extends circularCylinder /圓錐 Cone()Cone(double r,double h) super(r,h);public double vol()double v = super.vol()/3;return v;public double area() dou

8、ble l = Math.sqrt(radius*radius+height*height);double s = 3.14*radius*radius+3.14*radius*l;return s; class Ball implements shape double r;public Ball(double r) this.r=r; public double vol() return (4/3)*3.14*r*r*r;public double area() / TODO Auto-generated method stubreturn 4*3.14*r*r;2、package GDOU

9、_JIKE;import java.util.Scanner;abstract class CompareObject /定義抽象類abstract int compareTo(Posisition a,Posisition b);class Posisition extends CompareObject /定義Posisition類int x;int y;Posisition()x=0;y=0;Posisition(int a,int b)x=a;y=b;int compareTo(Posisition a,Posisition b)int ci; int ai=a.x*a.x+a.y*a

10、.y; int bi=b.x*b.x+b.y*b.y; ai=(int) Math.sqrt(ai); bi=(int) Math.sqrt(bi); ci=ai-bi; if(ci<0) ci=0-ci; return ci; public class Exercise5 public static void main(String args)System.out.print("創(chuàng)建點(diǎn)A，請(qǐng)輸入橫坐標(biāo)和縱坐標(biāo)：");Scanner input = new Scanner(System.in);Scanner input2 = new Scanner(System.in);int ai = input.nextInt(); / 輸入int bi = input2.nextInt();Posisition A=new Posisition(ai,bi);System.out.print("創(chuàng)建點(diǎn)B，請(qǐng)輸入橫坐標(biāo)和縱坐標(biāo)：");Scanner input3 = new Scanner(System.in);Scanner input4 = new Scanner(System.in);int ci = input3.nextInt(); / 輸入int di = input4.nextInt();Posis