Question

how to do global variable declaration in java

Answer 1

Hello,​

Global varriable which is defined after the class tag and before Method. so there are two type of Global variable

1.Instace global variable

public class GolbalVariable{
public String username;
public String password;
}

Explanation : this is called as instance variable . so on instance method you can access directly . suppose if you want to access inside statioc method then create Object of class and access it . if method is static then code to access the variable,

ClassObject obj=new ClassObject();//create class Object from static method
username;//if username is static
obj.username; // if username is instance

2.static global variable.

public class GolbalVariable{
public static String username;
public static String password;
}

Explanation : You can access directly with class Name

ClassObject obj=new ClassObject();//create class Object from static method
obj.username;//if username is static

​Hope this is helpful!

Thank You!!