java中父类和子类都有构造方法时，子类对象的初始化过程 - 黑马程序员技术交流社区

class Fruit{
public static String Fruit_name = "Fruit静态变量";
public String color = "Fruit非静态变量";
static{
System.out.println(Fruit_name); //若将Fruit_name的初始化放在static程序块后边，则编译错误，说明static成员变量及代码块级别相同，只看向后顺序
//System.out.println(color); //此时color还未初始化
System.out.println("Fruit的Static程序块");
}
public Fruit(){
System.out.println("Fruit()");
}
{ //虽然在构造函数后边，却先执行
System.out.println("---------------");
System.out.println(color);
System.out.println("Fruit非Static程序块");
}
}
public class Apple extends Fruit{
public static String apple_name = "appale静态变量";
public String apple_color = "Apple非静态变量";
static{
System.out.println(apple_name);
//System.out.println(apple_color); //此时apple_color还未初始化
System.out.println("Apple的Static程序块");
}
{
System.out.println("---------------");
System.out.println(apple_color);
System.out.println("Apple非Static程序块");
}
public Apple(){
System.out.println("appale()");
}
public static void main(String args[]){
new Apple();
}
}

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