java构造函数
1 public class Person 2 { 3 int id; 4 int age; 5 Person(int _id,int _age) 6 { 7 id=_id; 8 age=_age; 9 } 10 public static void main(String[] ages) 11 { 12 Person tom=new Person(1,25); 13 Point p=new Point(); 14 } 15 } 16 class Point 17 { 18 Point() 19 { 20 21 } 22 23 int x; 24 int y; 25 }