Question

java编程 定义一个类Point，代表一个点，public属性有x和y，方法有显示点坐标 show（），构造函数有两

1. 定义一个类Point，代表一个点，public属性有x和y，方法有显示点坐标show（），构造函数有两个参数分别给x,y赋值，在main方法中构造两个对象，再创建一方法(getMiddle)为取两个点构成线段的中点的坐标，参数为2个点对象，调用此方法后得到一个新的点，编写Application，显示该对象的坐标值。

Answer 1

文件MyPoint.java

public class MyPoint{
    public double x,y;
    public MyPoint(){
        x = 0.0;
        y = 0.0;
    }
    public MyPoint(double x,double y){
        this.x = x;
        this.y = y;
    }
    public void show(){
        System.out.println("("+x+","+y+")");
    }
    public static MyPoint getMiddle(MyPoint p1,MyPoint p2){
        MyPoint p = new MyPoint((p1.x+p2.x)/2,(p1.y+p2.y)/2);
        return p;
    }
}

文件Test.java

public class Test{
    public static void main(String[] args){
        MyPoint p1 = new MyPoint();
        MyPoint p2 = new MyPoint(6.0,8.0);
        MyPoint p = MyPoint.getMiddle(p1,p2);
        System.out.print("点1：");
        p1.show();
        System.out.print("点2：");
        p2.show();
        System.out.print("中点：");
        p.show();
    }
}

望采纳~

Answer 2

public class Point {

public double x;

public double y;

Point(double x, double y) {
this.x=x;
this.y=y;
}
static Point getMiddle(Point point1,Point point2){
double px=(point1.x+point2.x)/2;
double py=(point1.y+point2.y)/2;
Point p=new Point(px,py);
return p;
}
void show(){
System.out.println("点的坐标：("+x+","+y+")");
}
public static void main(String[] args) {
Point point1=new Point(0,0);
point1.show();
Point point2=new Point(4,9);
point2.show();
Point p=getMiddle(point1,point2);
p.show();
}
}