/**
*柱体
*/
interfaceColumn{
doublePI=Math.PI;
doublegetArea();//求表面积
doublegetVolume();//求得柱体的体积
voiddisplay();//将柱体的表面积和体积输出
}
/**
*@authorAdministrator
*圆柱体
*/
classCylinderimplementsColumn{
privatedoubleradius;
privatedoubleheight;
publicCylinder(doubleradius,doubleheight){
this.radius=radius;
this.height=height;
}
@Override
publicdoublegetArea(){
return2*PI*radius*(radiusheight);
}
@Override
publicdoublegetVolume(){
returnPI*Math.pow(radius,2)*height;
}
@Override
publicvoiddisplay(){
System.out.println(\"%%%圆柱体:\\n表面积=\"getArea()\"，体积=\"getVolume());
}
publicdoublegetRadius(){
returnradius;
}
publicvoidsetRadius(doubleradius){
this.radius=radius;
}
publicdoublegetHeight(){
returnheight;
}
publicvoidsetHeight(doubleheight){
this.height=height;
}
}
/**
*@authorAdministrator
*立方体
*/
classCubeimplementsColumn{
privatedoublesideLength;
publicCube(doublesideLength){
this.sideLength=sideLength;
}
@Override
publicdoublegetArea(){
return6*Math.pow(sideLength,2);
}
@Override
publicdoublegetVolume(){
returnMath.pow(sideLength,3);
}
@Override
publicvoiddisplay(){
System.out.println(\"%%%立方体:\\n表面积=\"getArea()\"，体积=\"getVolume());
}
publicdoublegetSideLength(){
returnsideLength;
}
publicvoidsetSideLength(doublesideLength){
this.sideLength=sideLength;
}
}
/**
*@authorAdministrator
*球体
*/
classBallimplementsColumn{
privatedoubleradius;
publicBall(doubleradius){
this.radius=radius;
}
@Override
publicdoublegetArea(){
return4*PI*Math.pow(radius,2);
}
@Override
publicdoublegetVolume(){
return4.0/3*PI*Math.pow(radius,3);
}
@Override
publicvoiddisplay(){
System.out.println(\"%%%球体:\\n表面积=\"getArea()\"，体积=\"getVolume());
}
publicdoublegetRadius(){
returnradius;
}
publicvoidsetRadius(doubleradius){
this.radius=radius;
}
}
/**
*@authorAdministrator
*测试类
*/
publicclassTest{
/**
*@paramargs
*/
publicstaticvoidmain(String[]args){
Columncolumns[]={newCylinder(1,3),newCube(1),newBall(2)};
for(Columncolumn:columns){
column.display();
}
}
} |
