constructor_overloading.java

来自「JAVA程序设计课程中各章节的程序实例。」· Java 代码 · 共 52 行

//Overloading constructor
class Box
{
	double width;
	double height;
	double depth;
	
	Box(double w, double h, double d)
	{
		width = w;
		height = h;
		depth = d; 
	}

	Box()
	{
		width = -1;
		height = -1;
		depth = -1;
	}

	Box(double len)
	{
		width = height = depth = len;
	}

	double volume()
	{
		return width*height*depth;
	}
}

class Constructor_overloading
{
	public static void main(String args[])
	{
		Box mybox1 = new Box(10,20,25);
		Box mybox2 = new Box();
		Box mycube = new Box(7);

		double vol;

		vol = mybox1.volume();
		System.out.println(vol);
		
		vol = mybox2.volume();
		System.out.println(vol);
		
		vol = mycube.volume();
		System.out.println(vol);
	}
}