Java Constructor sequence discuss | Java构造函数顺序小记

Class的构造顺序可以从编译的角度去理解，突然想到一个非常好的例子来说明这个问题

package com.cachetian.scjp;

public class MyChildObj {
	public MyChildObj() {
		System.out.println("My Child Obj Constructes");
	}
}
           

package com.cachetian.scjp;

public class MyObj extends MyFatherObj{
	
	protected MyChildObj child = new MyChildObj();
	
	public MyObj() {
		System.out.println("My Obj Constructed");
	}
	
	public static void main(String[] args) {
		new MyObj();
	}
}
           

package com.cachetian.scjp;

public class MyFatherObj extends MyGrandFatherObj{
	
	public MyFatherObj() {
		System.out.println("My Father Obj Constructed");
	}
}
           

package com.cachetian.scjp;

public class MyUncleObj {
	public MyUncleObj() {
		System.out.println("My Uncle Constructed");
	}
}
           

package com.cachetian.scjp;

public class MyGrandFatherObj {
	
	protected MyUncleObj myUncle = new MyUncleObj();
	
	public MyGrandFatherObj() {
		System.out.println("My Grandfather Constructed");
	}
}
           

运行结果：

My Uncle Constructed
My Grandfather Constructed
My Father Obj Constructed
My Child Obj Constructes
My Obj Constructed