//확장예
class coverLoading1
{    int x;
    String y;   
    public coverLoading1(){
        x=0;
        y="no";
    }
    public coverLoading1(int x){
        this.x =x;this.y ="no";   
    }
    public coverLoading1(int x,String y){
        this.x =x;this.y =y;   
    }
    public void printAll(){
        System.out.printf("x = %d ,y = %s n",x,y);
    }
    public static void main(String[] args)
    {
        coverLoading1 ob = new coverLoading1(1818,"값값값");
        ob.printAll();
        coverLoading1 ob2 = new coverLoading1();
        ob2.printAll();
        coverLoading1 ob3 = new coverLoading1(8989);
        ob3.printAll();

       
    }
}

// this이용 constructor Overloading
// 값이 맞는지 틀리는지 확인하는 코드가 필요할 경우 유리함.
class coverLoading1
{    int x;
    String y;   
    public coverLoading1(){
        //x=0;y="no";
  this(0,"no");
    }
    public coverLoading1(int x){
        //this.x =x;this.y ="no";   
  this(x,"no");
    }
    public coverLoading1(int x,String y){
  if(x<0)x=0;
        this.x =x;this.y =y;   
    }
    public void printAll(){
        System.out.printf("x = %d ,y = %s n",x,y);
    }
    public static void main(String[] args)
    {
        coverLoading1 ob = new coverLoading1(1818,"값값값");
        ob.printAll();
        coverLoading1 ob2 = new coverLoading1();
        ob2.printAll();
        coverLoading1 ob3 = new coverLoading1(8989);
        ob3.printAll();

       
    }
}