3_03_030421217.java

开始学JAVA老师布置的作业一学期的哦希望新手有用

class Root
{
	Root()
	{
	   System.out.println("Root construct");
	}
	Component1 com1=new Component1();
	Component2 com2=new Component2();
	Component3 com3=new Component3();
}

class Component1
{
	Component1() 
	{ System.out.println("Component1 construct"); }
}
class Component2
{
	Component2() 
	{ System.out.println("Component2 construct"); }
}
class Component3
{
	Component3() 
	{ System.out.println("Component3 construct"); }
}

public class Stem extends Root
{
	Stem()
	{
		System.out.println("Stem construct");
	}
    public static void main(String[] args)
    {
			Stem st = new Stem(); 
    }
	
}