Notes Unit 2
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package unit2;


/**
 *Name:
 *Date:
 * @author bassr8431
 */
public class NotesUnit2 {

    public static void main(String[] args)
    {
        Student defaultstu = new Student(); // So the three names are just number of them and the variables are placed in same order behind to define it
        Student student1 = new Student("Sue", 15, 234.989); // So this wont be a double since I casted it down to an int with (int)i
        Student student2 = new Student("Joe", 16, 345345345);
        //??? Why would he throw the numbers on the end when we are just creating a new student?
        student1.setName("Bill"); // So this changes the name of student one instead of naming the student upon its creation
        System.out.println("");
        System.out.println(student1.getName()); // So this is setter and getter for name. You can also have them for Id and GPA
        System.out.println("using modifier");

    }
}

Student.Java
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package unit2;

/**
 *Name:
 *Date:
 * @author bassr8431
 */
public class Student {
    private String name;
    private int age;
    private int idNum;
    //these up top that are accesible through all classes when starting brace
    //When using this however in Java they do have to be assigned later on in the code
    //Private means that they cannot be changed
    //default constructor
    public Student()
    {
        name = "default";
        age = 13;
        idNum = 0000;
        //double gpa = 0.0;
        // so this GPA double only works within this class. Why constructors are important
        //This would be used if the data does not need be saved like the others but just calculated once
        System.out.println(name + " " + age + " " + idNum);
        // you do not have to define a default but you just need one constructor. The other is just an example of my possiblity
    }
    //constructor that takes name, age , and ID number
     public Student(String n, int a, double i) // This defines the paramteters and has to match variable. So Name is a String and its defined as n
    {
        name = n;
        age = a;
        idNum = (int)i; //So I would not use a double here since the i isnt a double. Integers however can be promoted to doubles
    // So the Int demotes it down to a lower number. Cast will lowers the memory down to an int rather than memory for a double
     System.out.println(name + " " + age + " " + idNum);
     }

    // So any parameter set up has to have a corresponding variable or possibly has to be cast.

    //Constructor that takes names, age , and Idnumber; We dont need to use this however since
     //we defined what it is at the top of the curly brace and can reference it later
   // public Student(String n, int a, int i)
  //  {
   //     String name = n;
   //     int age = a;
   //     int idNum = i;
   // }

public void setName(String n) // void means it wont return anything so it will set the name but not return it

    {
        name = n;

    }
public String getName() //would get the name and return it instead of Void saving it
{
    return name;
}

public void setAge(int a)
{
    age = a;
}

public int getAge() // so like the name this will return the age except instead of string its an Int
{
    return age;
}
}


Unit 2
/*
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package unit2;

/**
 *
 * @author bassr8431
 */
public class Unit2 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
    }
}