kids31.java

java 教程源码

//c4:Kids31.java
//author:ZhangHongbin 
//This program is protected by copyright laws.
//Constructors among class and superclass.  
class Animal
{
	
	Animal(int num)
	{
		System.out.println("Animal's constructor");
	}
}
class Mankind extends Animal 
{
	
	Mankind(int num)
	{
		super(3);
		System.out.println("Mankind's constructor");
	}
		
}
public class Kids31 extends Mankind
{
	Kids31()
	{
		super(1);
		System.out.println("Kids3'constructor 1");
	}
	Kids31(int num)
	{
		super(2);
		System.out.println("Kids3'constructor 2");
	}

	public static void main(String[] args)
	{
		System.out.println("start kids'constructor ");
		Kids31 someKid1=new Kids31();
		Kids31 someKid2=new Kids31(999);
		System.out.println("end kids'constructor");
	}
}