定义一个描述平面坐标系统中点及其操作的类Point.(Java)

public class Point {
private double x;
private double y;
public Point(double x, double y){
this.x = x;
this.y = y;
}
public double getX() {
return x;
}
public double getY() {
return y;
}
public void shiftPoint(double w, double h){
x += w;
y += y;
}
public boolean pointEquals(Point point){
if(point.x == x && point.y == y)
return true;
return false;
}
public void whatQuadrant(){
int a = 1;
if( x < 0 && y > 0)
a = 2;
else if(x < 0 && y < 0)
a = 3;
else if(x > 0 && y < 0 )
a = 4;
if( x == 0 && y == 0 )
System.out.println("点("+x+","+y+")在原点");
else if(x == 0 && y !=0 )
System.out.println("点("+x+","+y+")在Y轴");
else if( y == 0 && x != 0 )
System.out.println("点("+x+","+y+")在X轴");
else
System.out.println("点("+x+","+y+")在第"+a+"象限");
}
public double findDistance(Point p){
BigDecimal b = new BigDecimal(Double.toString(Math.sqrt(Math.pow(x - p.x, 2) + Math.pow(y - p.y, 2))));
return b.setScale(2, BigDecimal.ROUND_CEILING).doubleValue();
}
public String toString(){
return "("+x+","+y+")";
}
public static void main(String [] args){
Point p =new Point(3,2);
System.out.println("x="+p.getX()+"y="+p.getY());
p.pointEquals(new Point(3,2));
p.shiftPoint(5,6);
System.out.println("x="+p.getX()+"y="+p.getY());
p.whatQuadrant();
System.out.println(p.findDistance(new Point(0,0)));
System.out.println(p.toString());
}
}