im back wit more questions

[keko4201]

ok im having difficulty making this method work correctly. this is just a test to determine why its not doing my calculation right. in this class i have an incomeing string and int from another class called smester. its supposed to chekc wheather the string is "A" or not. and to return a calculation if it is true. but all i get is 1.0 cause of my else statment. so the method is not reading my incoming string right i think, not sure.
does anyone in this forum know?

thnks
keke
(both classes are listed below

public class Courses
{

private int numCredits;
private String grade;

public void setGrade(String g)
{

grade = g;
}
public void setCredits(int c)
{

numCredits = c;
}


public double calcQualityPoints()
{
double points;
double qualPoints;

if(grade=="A")
{

points = 4.0;
qualPoints = numCredits * points;

return qualPoints;
}
else
{
return 1;
}
}

}

////////////////////////////////////////////////////////////////////
semester class
///////////////////////////////////////////////////////////////////

import javax.swing.JOptionPane;

public class Semester{

public static void main(String[] args){

int count = 1;
int courses = Integer.parseInt(JOptionPane.showInputDialog("How many courses did you take htis semester"));


while(count<=courses)
{

Courses school = new Courses();
String grad = JOptionPane.showInputDialog("Whats was the letter grade for " + count + "class");
school.setGrade(grad);

int creds = Integer.parseInt(JOptionPane.showInputDialog("How Many Credits was your " + count + "class"));
school.setCredits(creds);



System.out.println(school.calcQualityPoints());

count++;



}




}
}

[buntine]

In Java, a String is an object, which means you cannot just use the equals operator for comparison. (this would compare the actual objects).

You need to use the .equals(string) method.

public double calcQualityPoints()
{
   double points = 4.0;

   if(grade.equals("A"))
      return (numCredits * points);
   return 1;
}

That should work for you.

Regards.

[keko4201]

ok so that should work right, but i noticed u stored 4.0 in a variable, that means that i would have to write 6 different variables, correct? 1 for a, b ,b+,c,c+,d,d+,f,w. and the i would have to write all those into a nested if statment, so thats why i did it the wya i did. is therr another way of tackling this problem?

[keko4201]

thnks, works great, dont mind the previous reply.
did u start ur company by urself? or did u have a group to help u out?

thnks again
keko

[buntine]

You cna just change the value of the variable.

double points = 4.0;
...
points = 3.0;

In reference to the last question, I started the company on my own. Its currently on hold as im too busy with other parts of my life at the moment.

Regards.