[Java/CodingPractice]02. CodingPractice02

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import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
 
public class CodingPractice02 {
 
    public static boolean isOverlapped(Circle c1, Circle c2){
        double sumOfR = c1.getR() + c2.getR();
        double distance = Math.sqrt(Math.pow(c1.getX()-c2.getX(),2) + Math.pow(c1.getY() - c2.getY(), 2));
        
        if(distance < sumOfR){
            return true;
        }else{
            return false;
        }
        
    }
    
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        
        Scanner scan = new Scanner(System.in);
        int theNumberOfCircle=-1;
        
        // set the number of circles
        while(theNumberOfCircle < 0){            
            System.out.println("Please input the number of circles.");
            theNumberOfCircle = scan.nextInt();
            
            if(theNumberOfCircle<0){
                System.out.print("Worng value. ");
            }
        }
        
        List<Circle> circles = new ArrayList<Circle>(theNumberOfCircle);
        List<Integer> circlesId = new ArrayList<Integer>(theNumberOfCircle);
        
        // input circles
        for(int i = 0 ; i < theNumberOfCircle ; i++){
            
            Circle tempCircle = new Circle(scan.nextInt(), scan.nextDouble(), scan.nextDouble(), scan.nextDouble());
            
            // validation check
            // range of circle
            if(
                    (1 > tempCircle.getId() || tempCircle.getId() > 300) ||
                    (-10000 > tempCircle.getX() || tempCircle.getX() > 10000) ||
                    (-10000 > tempCircle.getY() | tempCircle.getY() > 10000) ||
                    (0 >= tempCircle.getR() || tempCircle.getR() > 10000)
              ){
                System.out.println("Worng value");
                i--;
                continue;
            }else if(i > 0){
                // ID duplication check
                if(circlesId.contains(tempCircle.getId())){
                    System.out.println("Worng value");
                    i--;
                    continue;
                }
            }
            
            circles.add(tempCircle);
            circlesId.add(tempCircle.getId());
            
        }
        
        
        // printing overlapped circles
        for(int i = 0 ; i < circles.size() ; i ++){
            for(int j = i ; j < circles.size() ; j++){
                if(i==j){
                    continue;
                }else{
                    if(isOverlapped(circles.get(i), circles.get(j))){
                        System.out.println(circles.get(i).getId() + ", " + circles.get(j).getId());                                            
                    }
                }
            }
        }
        
        
        
    }
 
}
 
class Circle{
    
    private int    id;
    private double x;
    private double y;
    private double r;
    
    
    public Circle() {
        super();
    }
 
    public Circle(int id, double x, double y, double r) {
        super();
        this.id = id;
        this.x = x;
        this.y = y;
        this.r = r;
    }
    
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    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;
    }
    public double getR() {
        return r;
    }
    public void setR(double r) {
        this.r = r;
    }
    
}