think in java 第5章 完整的JAVA初始化规则

package think.in.exercise11;
/**
 * @author Administrator
 *				完整展示JAVA的初始化顺序
 *		1:递归寻找顶层基类
 *		2:静态成员初始化
 *		3:静态块初始化
 *		4:成员变量按先后顺序初始化
 *		5:顶层基类的构造方法主体
 *		6:下层子类的构造,重复2~6的执行步骤
 */
class Meal{	
	private String first = getFirst();
	private String second = getSecond();
	private static String zero = getZero();//静态成员放在前的成员后面，但最先执行
	
	public Meal(){
		System.out.println("4:Meal()基类构造方法调用");
	}
	static{//静态块
		System.out.println("3:Meal()基类静态块初始化");		
	}
	private static String getZero(){
		System.out.println("0:静态成员变量最先初始化");
		return "zero";		
	}
	private String getFirst(){
		System.out.println("1:按顺序初始化非静态成员变量 first");
		return "first";
	}
	private String getSecond(){
		System.out.println("2:按顺序初始化非静态成员变量 second");
		return "second";
	}
}
class Bread{
	public Bread(){
		System.out.println("Bread()");
	}
}
class Cheese{
	public Cheese(){
		System.out.println("Cheese()");
	}
}
class Lettuce{
	public Lettuce(){
		System.out.println("Lettuce()");
	}
}
class Lunch extends Meal{
	public Lunch(){
		System.out.println("Lunch()");
	}
}

class PortableLunch extends Lunch{
	public PortableLunch(){
		System.out.println("PortableLunch()");
	}
}

public class Sandwich extends PortableLunch{

	private Bread b = new Bread();
	private Cheese c = new Cheese();
	private Lettuce l = new Lettuce();
	public Sandwich(){
		System.out.println("Sandwich()");
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
			new Sandwich();
	}

}