Method is used to simulate the ability, action or behavior of a class. It is usually a noun.
class Cylinder //定义Cylinder类
{
double radius;
int height;
double pi=3.14;
double area() //定义返回值为double型的方法area (),计算底面积
{
return pi* radius* radius;
}
double volume() //定义返回值为double型的方法volume (),计算体积
{
return area()*height; //在类内调用area()方法
}
}
public class javase_02 //定义公共类
{
public static void main(String[] args)
{
Cylinder volu;
volu=new Cylinder(); //创建新的对象
volu.radius=2.8; //赋值圆柱volu的底半径
volu.height=5; //赋值圆柱volu的高
System.out.println("底圆半径="+volu.radius);
System.out.println("圆柱的高="+volu.height);
System.out.print("圆柱");
System.out.println("底面积="+volu.area());
System.out.println("圆柱体体积="+volu.volume());
}
}