What is "instance-variables"
An instance variable is any declared variable within a class, but outside a method or constructor.
Instance variables are initialized with the default value every time a new instance of the class is created, even if they later receive an explicit value right after the constructor of the object is executed.
Follow an example using java:
public class UmaClasseQualquer {
//Qualquer variável declarada nesse espaço é uma variável de instância...
int VariavelDeInstancia;
public static void main(String[] args) {
{...}
}
}