person.java

有一个接口,用抽象类实现它的部分功能,再用实现类继承抽象类,实现其它没实现的接口方法

package cn.edu.csu.oo.inherite;

public class Person {
  String name;
  int age;
  String sex;
  public Person(){
    System.out.println("构造函数Person()被调用");
    System.out.println("nam= " + name + " ,age= " + age + " ,sex= " + sex);
  }
  public Person(String name){
    System.out.println("构造函数Person(String name)被调用");
    this.name = name;
    System.out.println("nam= " + name + " ,age= " + age + " ,sex= " + sex);    
  }
  public Person(String name, int age){
    this(name);
    System.out.println("构造函数Person(String name, int age)被调用");
    this.age = age;
    System.out.println("nam= " + name + " ,age= " + age + " ,sex= " + sex);    
  }
  public Person(String name, int age, String sex){
    this(name, age);
    System.out.println("构造函数Person(String name, int age, String sex)被调用");
    this.sex = sex;
    System.out.println("nam= " + name + " ,age= " + age + " ,sex= " + sex);    
  }
  //游离块（初始化块）
  {
    name = "jack";
    age = 30;
    sex = "Male";
    System.out.println("Person初始化块执行后：nam= " + name + " ,age= " + age + " ,sex= " + sex);
  }

}