java使用this调用构造函数的实现方法示例

class Person
{
  String name;
  int age;
  public Person()
  {
    System.out.println("1. public Person()");
  }
  public Person(String name, int age)
  {
    // 调用本类中无参构造方法
    this();
    this.name = name;
    this.age = age;
    System.out.println("2. public Person(String name,int age)");
  }
}
public class ThisConstructor
{
   public static void main(String[] args)
   {
    new Person("张三", 25);
  }
}