This document discusses different types of variables in Java: - Local variables can be used anywhere in a program. - Class variables are typical of the class that contains them. - Instance variables are used to define the attributes of an object. The document also provides an example of a Student class that uses different variable types, including instance variables to store student attributes like name and course information, and methods to set and retrieve this data.

1. Class 3
 Exposure: Methods and Attributes Group #3
 Exposure: Group #4
 Instance Variables
 Class Variables
 Local variables
Methods and Attributes
METHODS.- The method has a pair of keys , among which is the code that will be executed
when the function call .
ATTRIBUTES.- Determine a storage structure for each class object
EJERCICIO.-
public class person {
private String name;
public void setearName (String value)
{
name=value;
}
public void getName()
{
System.out.println(name);
}
}

2. Instance Variables, Class Variables and Local variables
 Local variables.- those are that can be used anywhere in the program.
 Class Variables.- is typical of the class that contains.
 Instance Variables.- are used to define the attributes of an object.
public class student {
private String name;
private String surnameFather;
private String surnameMother;
private int age;
public String specialty;
int totaltelephone=0;
String [] numbertelephono;
public int averagePrevious;
public int course;
public void setData1 (String espec,int proant,int course)
{
this.course=course;
if(curso>=4)
{
specialty =spec;
averagePrevious =aver;
}
else{
averagePrevious =aver;
}
}
public void setdataFamily(String name,String surnameFather,String
surnameMother,int age)
{
this.name=name;
this.surnamFather=surnameFather;
this.surnameMother=surnameMother;
this.age=age;
}
public void setTelephone(String Number)
{
totaltelephone++;
numberTelephone=new String[numberTelephone];
numberTelephone [numberTelephone -1]=Number;
}

3. public void Data()
{
System.out.println(course);
System.out.println(averagePrevious);
System.out.println(specialty);
System.out.println(name);
System.out.println(surnameFather);
System.out.println(surnameMother);
System.out.println(age);
}
}