Basic run order of the 5.Java class

We use the following class to illustrate the order in which a basic Java class is run:

2. Public class Demo{
4. Private String name;
6. Private int age;
10. Public Demo(){
12. Name = "Micro School";
14. Age = 3;
16. }
18. Public static void main(String[] args){
20. Demo obj = New demo();
22. System. Out. Theage of println (obj. Name + "is" + obj.);
24. }
26. }

The basic run order is:

1. First, run to line 9th, which is the entrance to the program.
2. Then run to line 10th, where a new demo is called to call the demo's construction method.
3. Run To line 5th, note: Many people may think that the next line should be run 6th, wrong! To initialize a class, you must first initialize its properties.
4. So run to line 2nd, then line 3rd.
5. After the initialization of the property, the constructor is returned to the code, which is the 6th line and the 7th line.
6. Then the 8th line indicates that the new demo instance is complete.
7. Then go back to the main method and execute line 11th.
8. Then the 12th line, and the main method executes.

As a programmer, it should be clear that the basic process of operation, otherwise confused, not conducive to writing code, but also not conducive to technical development.

Basic run order of the 5.Java class