class Student //extends Object
{
    public final String name; // final means can only assign to in constructor
    public final int ID;
    protected String major;
    protected double GPA;
    protected static String[] Majs = {"cs","cse","phy","bio","ee","chem","art","leisure studies"};
    public Student(String n)
    {
	name = n;   // same as this.name = n
	ID = (int)(Math.random()*1000000) + 702000000;
	GPA = (int)(Math.random()*401)/100.0;
	major = Majs[(int)(Math.random()*Majs.length)];
    }

    public String getmajor() { return major; }
    public void setGPA(double x)
    {
	if (x>=0 && x<=4.0) GPA= x;
    }

    public String toString()  // overrides Object.toString
    {
	return name+", ID "+ID+", majors in "+major+" and has a GPA of "+GPA;
    }
    
}//Student

public class first
{
    public static void main(String[] argv)
    {
	String[] Roster = {"Dalton","Andrew","Alihan","Brian","Luke","Jasper"};
	for(String s:Roster) System.out.println("Hello " + s);
	for(int i = Roster.length-1;i>=0;i--) System.out.println("Welcome back "+Roster[i]);


	Student s1 = new Student("Nev Erstudy");
	s1.setGPA(3.8);
	System.out.println(s1);

	/********* REALLY IMPORTANT  

        IN C++:
        Student s1("some name");
        Student* s2 = new Student("some other name");
        s1.setGPA(2.3);
        s2->setGPA(3.3);

        s2 corresponds to s1 in Java
        *********/
	
	
	Student[] Stus = new Student[Roster.length]; // creates 6 null pointers
	for(int i =0;i<Stus.length;i++)
	    Stus[i] = new Student(Roster[i]);

	for(Student s: Stus) System.out.println(s);

	String a = "abcde";
	String b = "ab";
	b = b + ((char)99) + "de";
	System.out.println(a);
	System.out.println(b);
	System.out.println(a==b);
	System.out.println( a.equals(b) );
	
    }//main
}