方法部分：publicclassPoint{privatedoublexpose,ypose;publicPoint(){super();//TODOAuto-generatedconstructorstubthis.xpose=0;this.ypose=0;}publicPoint(doublexpose,doubleypos...
方法部分：
public class Point {
private double xpose,ypose;
public Point() {
super();
// TODO Auto-generated constructor stub
this.xpose=0;
this.ypose=0;
}
public Point(double xpose, double ypose) {
super();
this.xpose = xpose;
this.ypose = ypose;
}
@Override
public String toString() {
// TODO Auto-generated method stub
String s="(";
s=s+this.xpose+",";
s=s+this.ypose+")";
return s;
}
public double Length(Point P)
{
double s=Math.pow(this.xpose-P.xpose,2);
s=s+Math.pow(this.ypose-P.ypose,2);
return Math.sqrt(s);
}
public double Angle()
{
if(Math.abs(xpose)==0)
return Math.PI/2;
if(Math.abs(ypose)==0)
return 0;
return Math.atan(ypose/xpose);
}
public void moveX()
{
xpose++;
}
public void moveX(double deltax)
{
xpose+=deltax;
}
public void moveY()
{
ypose++;
}
public void moveY(double deltay)
{
ypose+=deltay;
}
public void Rotate(double theta)
{
double x=xpose*Math.cos(theta)-ypose*Math.sin(theta);
double y=xpose*Math.sin(theta)+ypose*Math.cos(theta);
xpose=x;
ypose=y;
}
}
测试调用部分
public class PointTester {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Point P1=new Point(0,1);
Point P2=new Point(4,0);
System.out.println(P1);
System.out.println(P2);
System.out.println("length="+P1. Length (P2));
P1. Rotate (3.14159/2);
P2. Rotate (3.14159/2);
System.out.println(P1);
System.out.println(P1);
System.out.println("length="+P1. Length (P2));
}
}
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