定义一个描述平面坐标系统中点及其操作的类Point.(Java)定义一个描述平面坐标系统中的点及其操

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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)
a = 2; else if(x a = 3; else if(x > 0 && y 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());
}}