java下自定义read方法的实现并可以继承（转）

转载：http://blog.csdn.net/cen616899547/article/details/7498099

package thisandsuper;  
  
 class Person  
{  
  String name;  
  public int age = 10;  
  public byte[] datas;  
  Person()  
  {    
    System.out.println("调用父类无参数构造类" + age) ;   
  }  
    
  Person(String name, int age)  
  {  
    this.name = name;  
    this.age = age;  
    System.out.println("调用父类有参数构造类") ;   
    onPerson(name, age);  
  }  
    
  public void onPerson(String name, int age)  
  {  
    System.out.println("father onPerson:" +"age:"+ age  + " name "+ name);  
        
  }  
    
  public int read(byte[] bytes)  
  {  
      int i;  
      int length = name.length();  
      byte[] buffer = new byte[length];  
      buffer = name.getBytes();  
      for(i = 0; i < length; i++)  
      {  
        bytes[i] = buffer[i];           
      }  
    return  length;   
  }  
}  
  
   
 class Student extends Person  
 {  
    public int age = 20;   
    Student()  
    {  
     System.out.println("调用子类无参数构造类" + age) ;     
          
    }  
      
    Student(String name, int age)  
      {  
        super(name, age);  
        System.out.println("调用子类有参数构造类") ;       
      }  
      
    public void onPerson(String name, int age)  
      {  
        System.out.println("child onPerson:" +"age:"+ age  + " name "+ name);  
            
      }  
 }  
  
public class MyTest  
{  
      
  public static void main(String[] args)  
  {  
     Student s1 = new Student();  
     Student s2 = new Student("li xiangxing",15);  
     byte[] buffer = new byte[1024];  
     int length = s2.read(buffer);  
     System.out.println("read:" + length + " " + new String(buffer));  
  }  
}