Ex9_4 코드
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package org.javaro.lecture;
public class Ex9_4 {
public static void main(String [] args) {
System.out.println("조병수-20191114-인터페이스");
double sum; float x,y,z;
x=Float.parseFloat(args[0]);y=Float.parseFloat(args[1]);z=Float.parseFloat(args[2]);
AreaTest1 object1 = new AreaTest1(x);
sum = object1.CalArea(x);
System.out.println("원 면적은 "+sum +"입니다");
AreaTest1 object2 = new AreaTest1(x,y);
sum = object2.CalArea(x,y);
System.out.println("직사각형 면적은 "+sum +"입니다");
AreaTest2 object3 = new AreaTest2(x,y,z);
sum = object3.CalArea(x,y,z);
System.out.println("부피는 "+sum +"입니다");
object3.rtcal(x,y); object3.rhcal(x,y); object3.ccal(x);
}
}
class AreaTest1 {
float width,height, depth;
public AreaTest1(float h) {
height= h;
}
public AreaTest1(float h,float w) {
height = h;
width = w;
}
public double CalArea(float a) {
double sum1;
sum1 = a * a* 3.14;
return sum1;
}
public float CalArea(float a, float b) {
float sum2;
sum2 = a * b;
return sum2;
}
}
interface RectangleCal {
// float base = 10.0, height = 20.0;
public float rtcal(float b, float h);
}
interface RhombusCal {
// float diagonal1= 5.0, dialgonal2 = 4.5;
public float rtcal(float d1, float d2);
}
interface AreaCal extends RectangleCal, RhombusCal {
}
interface CircleCal{
// float radius = 10.0;
double ccal(float r);
}
class AreaTest2 extends AreaTest1 implements AreaCal, CircleCal {
public AreaTest2(float h, float w, float d) {
super(h,w);
depth = d; }
public float CalArea(float a, float b, float c) {
float sum3;
sum3 = (a * b) * c;
return sum3; }
public float rtcal(float a, float b) {
float rtarea;
rtarea = a * b;
System.out.println("인터페이스에 의한 사각형 면적은 "+rtarea +"입니다");
return rtarea; }
public float rhcal(float a, float b) {
float rharea;
rharea = a * b / 2;
System.out.println("인터페이스에 의한 마름모 면적은 "+rharea +"입니다");
return rharea; }
public double ccal(float a) {
double ccarea;
ccarea = a * a * 3.14;
System.out.println("인터페이스에 의한 원 면적은 "+ccarea +"입니다");
return ccarea; }
}
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