Question

java问题 定义一个Point点类

定义一个Point点类，成员变量有x,y,成员函数set()设置x,y的值，get()获取x,y的值，并定义一个点对象调用set()和get(),并定义一个点对象调用set()和get（）构造方法重载，distance（）表示2点间的距离。

Answer 1

public class Point {

    private int x;
    private int y;

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

    public int getX() {
        return x;
    }

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

    public int getY() {
        return y;
    }

    public void setY(int y) {
        this.y = y;
    }
    
    public double distance(Point p1,Point p2){
        return Math.sqrt((p2.getX()-p2.getX())*(p2.getX()-p2.getX())+(p2.getY()-p1.getY())*(p2.getY()-p1.getY()));
    }
    
    public static void main(String args[]){
        Point p1 = new Point(14,17);
        Point p2 = new Point(23,90);
        double s = p1.distance(p1,p2);
        System.out.println("2点之间的距离为："+s);
    }
}

Answer 2

package test1;

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

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

public int getX() {
return x; }

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

public int getY() {
return y; }

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

public double distance(Point p1, Point p2){
return Math.sqrt((p2.getX()-p1.getX())*(p2.getX()-p1.getX())+(p2.getY()-p1.getY())*(p2.getY()-p1.getY()));
}

public void displayPoint (int x, int y){
System.out.println("x:"+x+",y:"+y);
}

public static void main(String args[]){
Point p1 = new Point(10,20);
Point p2 = new Point(35,25);
Point a1=new displaypoint(10,20);
a2= new displaypoint(35,25);
double s = p1.distance(p1,p2);

System.out.println("2点之间的距离为："+s);
}
}

Answer 3

public class Point {

private float x,y;

public Point(float x,float y){

this.x=x;

this.y=y;

}

public float getX() {

return x;

}

public void setX(float x) {

this.x = x;

}

public float getY() {

return y;

}

public void setY(float y) {

this.y = y;

}

public double distance(Point p){

return Math.sqrt((p.getX()-x)*(p.getX()-x)+(p.getY()-y)*(p.getY()-y));

}

}