can anyone help me
import javax.swing.JOptionPane;
public class GPA
{
public static void main(String[] args)
{
String subString = JOptionPane.showInputDialog(null," Enter Grade for Math","Input",JOptionPane.QUESTION_MESSAGE);
System.out.println(subString);
printGpa(subString);
}
public static void printGpa(String subString)
{
double result;
if(subString.equals("a"))
result = 4.0;
System.out.println(" Gpa for security is "+ result);
}
}
i am new to java can any one help me in doing this, i am getting an error that result is not initialized but i had initialized it in the if statement. i think that in the printGpa method if loop is not working can any one help me with this program.
what i actually want to do is to give input a and if input is a then the result should be 4.0 that's it.
I will be very much thankful to you for your help
[946 byte] By [
surkuma] at [2007-11-27 8:20:32]
What if subString is not "a"? Result would not get initialized in that case. Try this:
if(subString.equals("a"))
{
result = 4.0;
}
//add in else ifs for grades b - d
else
{
result = 0.0;
}
This way, no matter what subString is, result will get initialized with some value.
double result;
if(subString.equals("a"))
result = 4.0;
System.out.println(" Gpa for security is "+ result);
If subString doesn't equal "a", then what will the value of result be when you hit the println? It will be undetermined. You have to set a variable to something before you access it. Either give it a default value, or put in an else statement that will assign it.
ps, it's not called an if loop. For and while are loops, not if.
actually this is not complete program if subString is not 'a' then just print any error statement using System.out.println
my actual problem is that eventhough i am initializing the result in the if statement. i am getting error that result is not initialized.
you think that we just give input 'a' so the result should print 4.0 but it is not , i am getting errors.
