cylinder.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter8;

class Cylinder
{
    double radius;
    double depth;
    Cylinder (double r, double d)
    {
        this.radius = r;
        this.depth = d;
    }

    public String toString()
    {
        return " Dimensions are " + this.radius + " by " + this.depth + ".";
    }
}
	
class ToStringDemo
{
    public static void main(String args[])
    {
        Cylinder c = new Cylinder (10, 14);
        String s = "Cylinder c: " + c; // concatenate Cylinder object
        System.out.println(c); // convert Cylinder to string
        System.out.println(s);
    }
}