javapoint如何交换坐标

⑴ 求高手用java帮我设计一个完整的Point类，可以计算两点之间距离和中间点坐标的，万分感谢！

你好，程序如下：

public class Point {

double x1,x2,y1,y2;
double d,x3,y3;
Point(double x1,double y1,double x2,double y2){//构造方法
回this.x1 = x1;
this.x2 = x2;
this.y1 = y1;
this.y2 = y2;
}
void TestPoint(){//求距离和答中点坐标
x3 = (x1 + x2)/2;
y3 = (y1 + y2)/2;
d = Math.sqrt((x1 - x2)*(x1 - x2) + (y1 - y2)*(y1 - y2));

System.out.println("(" + x3 + ","+ y3 + ")");
System.out.println(d);
}

public static void main(String[] args) {
Point p = new Point(1,1,2,2);
p.TestPoint();

}

}
如果还有其他要求的话，我再改进一下。

⑵ java定义一个点类Point, 具备坐标系中的横坐标x, 和纵坐标y, 并实现如下功能:

Point类

publicclassPoint{
	privatefloatx;
	privatefloaty;
	publicPoint(floatx,floaty){
		this.x=x;
		this.y=y;
	}
	
	publicfloatgetX(){
		returnx;
	}

	publicvoidsetX(floatx){
		this.x=x;
	}

	publicfloatgetY(){
		returny;
	}

	publicvoidsetY(floaty){
		this.y=y;
	}

	publicfloatdistanceToOrigin(){
		return(float)Math.sqrt(Math.pow(this.x,2)+Math.pow(this.y,2));
	}
	
	publicfloatdistanceToOther(intx,inty){
		return(float)Math.sqrt(Math.pow(this.x-x,2)+Math.pow(this.y-y,2));
	}
	
	publicfloatdistanceToOther(Pointpoint){
		return(float)Math.sqrt(Math.pow(this.x-point.x,2)+Math.pow(this.y-point.y,2));
	}
}

测试类

publicclassTestPoint{
	publicstaticvoidmain(String[]args){
		Pointp1=newPoint(3,5);
		Pointp2=newPoint(7,8);
		System.out.println(p1.distanceToOrigin());
		System.out.println(p2.distanceToOrigin());
		System.out.println(p1.distanceToOther(20,30));
		System.out.println(p2.distanceToOther(20,30));
		System.out.println(p1.distanceToOther(p2));
	}
}

⑶ 用JAVA定义一个描述点的point类.它有两个成员变量：横坐标x,纵坐标y

实现思路就是有一个类Point，之后这个类有两个私有成员变量，之后可以通过set和get方法进行赋值和数值读取：
public
class
Point
{
private
String
x;
private
String
y;
/**
*
默认构造函数
*/
public
Point(){
}
/**
*有x和y的构造方法。
*/
public
Point(String
x,String
y){
this.x=x;
this.y=y;
}
public
String
getX()
{
return
x;
}
public
void
setX(String
x)
{
this.x
=
x;
}
public
String
getY()
{
return
y;
}
public
void
setY(String
y)
{
this.y
=
y;
}
}

⑷ java编写一个表示坐标点的类（Point），其中包含x和y两个坐标点的值，并且包含一个打印出该点坐标的方法

publicclassPoint{
privateintx;
privateinty;

publicgetX(){returnx;}

publicgetY(){returny;}

publicsetX(intx){this.x=x;}

publicsetY(inty){this.y=y;}

publicPoint(intx,inty){
this.x=x;
this.y=y;
}

publicdisplayPoint(){
//输出坐标
System.out.println("x:"+x+",y:"+y);
}
publicstaticdistancePoint(Pointp1,Pointp2){
//计算坐标距离
inta=p1.getX()-p2.getX();
intb=p1.getY()-p2.getY();
returnMath.sqrt(a*a+b*b);
}
}

⑸ JAVA编程问题 定义一个泛型类Point，它包含横坐标x和纵坐标y两个变量，类型均为T

public class Point<T> {
private T x;
private T y;

public Point(T x, T y) {
this.x = x;
this.y = y;
}

public T getX() {
return x;
}

public void setX(T x) {
this.x = x;
}

public T getY() {
return y;
}

public void setY(T y) {
this.y = y;
}

public void outPut(Point<T> p){
System.out.println("点的x坐标为:"+p.getX());
System.out.println("点的y坐标为:"+p.getY());
}

public static void main(String[] args) {
Point<Integer> p=new Point<Integer>(1,2);
p.outPut(p);

Point<Double> d=new Point<Double>(1.0,2.0);
d.outPut(d);

Point<Float> f=new Point<Float>(1.0f,2.0f);
f.outPut(f);

}

}