Point类的构造函数
import java.util.*;
class Point{
int a;
int b;
Point() {
a=0;
b=0;
}
Point(int a,int b) {
this.a=a;
this.b=b;
}
public void showPoint() {
System.out.println("("+a+","+b+")");
}
}
public class Main{
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
Point m=new Point();
m.showPoint();
int x=sc.nextInt();
int y=sc.nextInt();
Point n=new Point(x,y);
n.showPoint();
sc.close();
}
}