21st Lesson object's Construction order

1. Order of construction of objects

(1) for a local object : Constructed when the program execution Flow arrives at the object's definition statement

The construction order of the "instance analysis" local objects

(2) for heap Objects

① creating an object when the program execution flow arrives at the new statement

② using new to create an object will automatically trigger the call of the constructor

Construction order of the "programming Experiment" heap object

(2) for global Objects

The order in which the ① objects are constructed is indeterminate

② different compilers use different rules to determine the construction order

The construction order of the "instance analysis" global object

2. Summary

(1) The construction order of local objects depends on the execution flow of the program

(2) The construction order of heap objects depends on the order in which new is used

(3) The construction order of global objects is indeterminate

21st Lesson object's Construction order