你的第二个方法要求描述不太明白，我就按照自己的理解写了一个。
我偷懒就直接在main方法里面写测试代码了，你需要的话就再自己定义一个Test类写个mian方法，内容其实没什么区别。
public class Point {
private double x
private double y
public Point(double x, double y) {
super()
this.x = x
this.y = y
}
public double distance(Point point) {
return Math.sqrt((point.x - this.x) * (point.x - this.x) + (point.y - this.y) * (point.y - this.y))
}
public Point move(double x, double y) {
return new Point(this.x + x, this.y + y)
}
@Override
public String toString() {
// TODO Auto-generated method stub
return "(" + x + ", " + y + ")"
}
public static void main(String[] args) {
Point p1 = new Point(5, 6)
Point p2 = new Point(-2, -9)
System.out.println(p1.distance(p2))
System.out.println(p1.move(11, -2))
}
}
测试结果：
16.55294535724685
(16.0, 4.0)
public class Point{
public static void main(String[] args)
{
Point p1=new Point()
Point p2=new Point(1,2)
p1.show()
p1.move(3,4)
p1.show()
p2.show()
p2.move(5,6)
p2.show()
}
Point()
{
this(0,0)
}
Point(float x,float y)
{
this.x=x
this.y=y
}
void move(float x,float y)
{
this.x=x
this.y=y
}
void show()
{
System.out.printf("(%f,%f)",x,y)
System.out.println()
}
private float x,y
}
