Question

这道java题应该怎么做？

编写坐标系的zhong 的点类Cpoint。1、编写相应的构造方法初始化某个点；2、重载构造方法初始化对角线的点；3、编写重载方法计算点到原点，点到点，点到另一个坐标的距离。
主函数如下：
public static void main(String[] args){
int x1,x,y1;
Scanner scn=new Scanner(System.in);
x1=scn.nextInt();y1=scn.nextInt();
x=scn.nextInt();
Point p1 = new Point(x1,y1);
Point p2 = new Point(x);
System.out.println(String.format("%.2f", p1.distance()));
System.out.println(String.format("%.2f", p2.distance()));
System.out.println(String.format("%.2f", p1.distance(6,8)));
System.out.println(String.format("%.2f", p1.distance(p2)));
}
输入

输入两个点
输出

点之间的距离
难度

一般
输入示例

3 4
5
输出示例

5.00
7.07
5.00
2.24

Answer 1

Java源代码：

public class Test {

public static void main(String[] args) {

Point p1 = new Point(4, 5);

System.out.printf("点p坐标为（%f,%f）\n", p1.getX(), p1.getY());

p1.setX(3);

p1.setY(4);

System.out.printf("重置后点p坐标为（%f,%f）\n", p1.getX(), p1.getY());

System.out.printf("点（%f, %f）到原点的距离的平方为%f\n", p1.getX(), p1.getY(),

p1.distance());

Point p2 = new Point(1, 2);

System.out.printf("点（%f,%f）到点（%f,%f）的距离的平方为%f\n", p1.getX(),

p1.getY(), p2.getX(), p2.getY(), p1.distance(p2));

}

}

class Point {

protected double x;

protected double y;

public Point(){

}

public Point(double x, double y) {

this.x = x;

this.y = y;

}

public void setX(double x) {

this.x = x;

}

public double getX() {

return this.x;

}

public void setY(double y) {

this.y = y;

}

public double getY() {

return this.y;

}

public double distance() {

return Math.pow(x, 2) + Math.pow(y, 2);

}

public double distance(Point p) {

return Math.pow(this.x - p.x, 2) + Math.pow(this.y - p.y, 2);

}

}

运行测试：

Answer 2

public class Point {
private int x;
private int y;

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

public Point(int x) {
this(x, x);
}

public int getX() {
return x;
}

public int getY() {
return y;
}

public double distance(int x, int y) {
return Math.sqrt(Math.pow(x - this.x, 2) + Math.pow(y - this.y, 2));
}

public double distance(Point p) {
return distance(p.getX(), p.getY());
}

public double distance() {
return distance(0, 0);
}

public static void main(String[] args) {
int x1, x, y1;
Scanner scn = new Scanner(System.in);
x1 = scn.nextInt();
y1 = scn.nextInt();
x = scn.nextInt();
Point p1 = new Point(x1, y1);
Point p2 = new Point(x);
System.out.println(String.format("%.2f", p1.distance()));
System.out.println(String.format("%.2f", p2.distance()));
System.out.println(String.format("%.2f", p1.distance(6, 8)));
System.out.println(String.format("%.2f", p1.distance(p2)));
}
}

追问

谢谢，我已经会了