testpoint.java

来自「常用的java控件使用实例源代码」· Java 代码 · 共 68 行

public class TestPoint {
	public static void main(String[] args) {
		double s = 0;
		Point p = new Point(3,4,5);
		Point p1 = new Point(0,0,0);
		System.out.println(p.getDistance(p1));
		
		p.setX(2.0);
		System.out.println(p.getDistance(new Point(1.0,2.0,3.0)));
/*		


		p.display();
		//s = p.compulateQuare();
		//System.out.println("s=" + s);
		
		p.setX(3);
		p.display();
		//System.out.println("s=" + s);
		
		p.setY(4);
		p.display();
	//	p.compulateQuare();
		//System.out.println("s=" + s);
		*/
	}

}

class Point {
	double x;
	double y;
	double z;
	
	Point(double _x,double _y, double _z) {
		x = _x;
		y = _y;
		z = _z;
	}
	
	public void setX(double _x) {
		x = _x;
	}
	
	public void setY(double _y) {
		y = _y;
		
	}
	
	public void setZ(double _z) {
		z = _z;
	}
	
	/*
	public double compulateQuare() {  
		return x*x + y*y + z*z;
	}
	*/
	
	double getDistance(Point p) {
		return (x - p.x)*(x - p.x) + (y - p.y)*(y - p.y) + (z - p.z)*(z - p.z);
	}
	
	public void display() {
		System.out.println("x=" + x + " y=" + y + " z=" + z);
	}
}