Question

java编程。Point类有double型的x和y两个私有成员变量，有对它们进行读写的公有方法，

该类还有一个对x和y进行初始化的构造方法，还有一个公有的getDistanceFromOrigin()方法（求到左边原点的距离），在主类中创建一个点对象，输出其到原点的距离
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Answer 1

public class Point{

private double x;
private double y;

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

public double getDistanceFromOrigin(){
return Math.sqrt((Math.pow(x, 2) + Math.pow(y, 2)));
}

public static void main(String[] args){
Point p = new Point(3, 4);
System.out.println(p.getDistanceFromOrigin());
}

public double getX()
{
return x;
}
public void setX(double x)
{
this.x = x;
}
public double getY()
{
return y;
}
public void setY(double y)
{
this.y = y;
}
}