Java Program Execution Order

give the conclusion first:Execution Order: Parent class static Block--subclass static block (before main function execution), parent class block, parent class constructor, child class constructor, subclass blockAssignment Order: Member variable assignment, block assignment, and constructor assignment

1 classa{2     Static{System.out.println ("Class A");}3{System.out.println ("Class C");}4      PublicA () {5System.out.println ("This class A");6     }7 }8 9  Public classTest1extendsa{Ten     Static{System.out.println ("Class B");} One      PublicTest1 () { ASystem.out.println ("This class B"); -     } -{SYSTEM.OUT.PRINTLN ("Class D");} the      Public Static voidMain (string[] args) { -SYSTEM.OUT.PRINTLN ("----Start---"); -         NewTest1 (); -         NewTest1 (); +SYSTEM.OUT.PRINTLN ("---end---"); -     } + } A  at The result is: - Class A - classB -----Start--- - Class C -  This classA in classD -  This classB to Class C +  This classA - classD the  This classB *---end---

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The assignment step is

1. Static variable assignment for parent class
2. Static variable assignment of its own value
3. Parent class Member variable assignment
4. Parent Class block Assignment
5. Parent class constructor Assignment value
6. Assigning values to self-member variables
7. Self-block assignment
8. Self constructor Assignment

Java program Execution order