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import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Circle circle=new Circle(1.5,1.6,2.0);
System.out.printf("圆的面积是::%.2f\n",circle.getArea());
do {
System.out.println("请输一个点:");
Scanner scn=new Scanner(System.in);
double x=scn.nextDouble();
double y=scn.nextDouble();
circle.contains(x,y);
System.out.println("是否继续?");
String command=scn.next();
}while(command.equalsIgnoreCase("y"));
}
}
public class Circle {
private double x;
private double y;
private double radius;
public Circle(double x,double y,double radius) {
this.x=x;
this.y=y;
this.radius=radius;
}
public double getArea(){
return Math.PI*radius*radius;
}
public void contains(double x,double y) {
if(radius*radius>Math.pow((x-this.x),2)+Math.pow((y-this.y), 2))
System.out.println("包含在内");
else
System.out.println("不包含在内");
}
}

String command="";
do {
System.out.println("请输一个点:");
Scanner scn=new Scanner(System.in);
double x=scn.nextDouble();
double y=scn.nextDouble();
// circle.contains(x,y);
System.out.println("是否继续?");
command=scn.next();
}while(command.equalsIgnoreCase("y"));; 在do while循环外面初始化一下