java中初始化时机和顺序呢

class Pupil{

        Pupil(int age){

                System.out.println("Pupil:"+age);

            }

    }

class Teacher{

        Pupil p1=new Pupil(9);

        Teacher(){

                System.out.println("Teacher()");

                p3=new Pupil(10);

            }

        Pupil p2=new Pupil(11);

        void teach(){

                System.out.println("teach()");

            }

        Pupil p3 =new Pupil(12);

    }

    public class Sequence{

            public static void main(String [] args){

                    Teacher t=new Teacher();

                    t.teach();

                }

        }