boxdemo.java

Java 程序设计源码 只提供了部分

class Box {
	private int width = 4;
	private int height = 4;
	private int depth = 4;

	public Box(int width, int height, int depth) {
		this.width = width;
		this.height = height;
		this.depth = depth;
	}
	
	public double volume() {
		double volume;

		volume = 4 * width * height * depth;
	
		return volume;
	}
}

public class BoxDemo {
	public static void main(String[] args) {
		Box b = new Box(30,30,30);

		System.out.println(b.volume());
	}
}