java——构造方法重载
1 class Person 2 { 3 private String name ; 4 private int age ; 5 public Person() 6 { 7 } 8 public Person(String n,int a) 9 { 10 name = n; 11 age = a; 12 System.out.println(name+age) ; 13 } 14 public String talk() 15 { 16 return "我是: "+name+",今年: "+age+"岁" ; 17 } 18 } 19 20 public class Test 21 { 22 public static void main(String[] args) 23 { 24 Person p = new Person() ; 25 System.out.println(p.talk()) ;