[java]java初始化顺序的代码解释，

[java]java初始化顺序的代码解释，

1.基类（生物）

public class Biology {
	protected String name;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public Biology() {
		System.out.println("Biology constructor.name=" + this.name);
	}

	{
		name = "class-Biology";
		System.out.println("Biology field.name=" + name);
	}

	static {
		System.out.println("Biology static");
	}
}

2.子类（动物）

public class Animal extends Biology {
	public Animal() {
		System.out.println("Animal constructor.name=" + this.name);
	}

	{
		name = "class-Animal";
		System.out.println("Animal field.name=" + name);
	}
	static {
		System.out.println("Animal static");
	}

}

3.子类（狗）

public class Dog extends Animal {

	public Dog() {
		System.out.println("Dog constructor.name=" + this.name + ",type=" + this.type);
	}

	private String type = "poodle";
	{
		name = "class-Dog";
		System.out.println("Dog field.name=" + name);
		System.out.println("Dog field.type=" + type);
	}
	static {
		System.out.println("Dog static");
	}
}

4.测试

public static void main(String[] args) {
		Dog ee = new Dog();
		System.out.println(ee.getName());
	}

打印结果：

Biology static
Animal static
Dog static
Biology field.name=class-Biology
Biology constructor.name=class-Biology
Animal field.name=class-Animal
Animal constructor.name=class-Animal
Dog field.name=class-Dog
Dog field.type=poodle
Dog constructor.name=class-Dog,type=poodle
class-Dog