What is the difference between different variables in java

This article introduces the relevant knowledge of "what is the difference between different variables in java". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Difference

1. Position in the class

Member variables: in the class, outside the method

2. Location in memory

Member variables: heap

Local variables: stack

3. Initialized value

Member variables: with default

Local variable: no default value, only definition, assignment, can be used

Life cycle

Member variables: created as the object is created, and disappear as the object disappears

Local variables: exist with the call of the method and disappear with the end of the method

Example

The problem of duplicate names of member variables and local variables, the principle of proximity

You can use the this keyword to distinguish, and this.string refers to the member variables in the class, not those inside the method.

Public class Demo {String string= "member variables"; public static void main (String [] args) {new Demo (). Show ();} public void show () {String string= "local variables"; System.out.println (string);}} "what are the differences between different variables in java". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!