实例解析JAVA中代码的加载顺序

public class App {
  private static App d = new App();
  private SubClass t = new SubClass();

  static{
    System.out.println("App static");//6
  }

  public App(){
    System.out.println("构建App");//5
  }

  public static void main(String[] args) {
    System.out.println("App main");//7
  }
}
//父类
class SuperClass{
  static{
    System.out.println("SuperClass static");//1
  }
  SuperClass(){
    System.out.println("构建SuperClass");//3
  }
}
//子类
class SubClass extends SuperClass{
  static{
    System.out.println("SubClass static");//2
  }
  public SubClass(){
    //super()
    System.out.println("构建SubClass");//4
  }
}

SuperClass static
SubClass static
构建SuperClass
构建SubClass
构建App
App static
App main