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using a varible from main method
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Join Date: Oct 2004
Posts: 44
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Light Poster
heres the start
public class work
{
public static void main (String [] args)
{
int number = 1;
}
public static boolean ifstate()
{
if ( number == 0 )
blah blah
}
question - how do I get the second method to call on the varible from the first.
thanks
public class work
{
public static void main (String [] args)
{
int number = 1;
}
public static boolean ifstate()
{
if ( number == 0 )
blah blah
}
question - how do I get the second method to call on the varible from the first.
thanks
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Join Date: Sep 2004
Posts: 84
Reputation:
Solved Threads: 1
Junior Poster in Training
It is a matter of scope.
Put
outside the Main method (at the begining of your class.)
Look up the deffinition of scope in Java to learn more
Put
Java Syntax (Toggle Plain Text)
Look up the deffinition of scope in Java to learn more
A better way is to pass it to the second method as a parameter. Especially since main is static and pulling the variable outside main would cause all kinds of other problems (especially if multiple instances of the class are created).
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Join Date: Oct 2004
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how do you "pass it to the second method as a parameter"
is it
public static int ifstate(int number)
????
is it
public static int ifstate(int number)
????
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Join Date: Sep 2004
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Junior Poster in Training
Try this (in reference to passing the variable):
public class work {
public static void main (String [] args) {
boolean booleanAnswer;
int number = 1;
// Passes copy of number to ifstate
booleanAnswer = ifstate(number);
}
public static boolean ifstate(int passedNumber) {
if ( passedNumber == 0 )
//blah blah
}
Let me know if it is not clear
}//end class •
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not clear, i dont need a boolean , sorry to have had posted it at the top
i just need a simple number to pass
i just need a simple number to pass
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Originally Posted by jerbo
It is a matter of scope.
Put
outside the Main method (at the begining of your class.)Java Syntax (Toggle Plain Text)
Look up the deffinition of scope in Java to learn more
non-static variable thirdNo cannot be referenced from a static context
???
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Join Date: Oct 2004
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quick question
how do you also pass(call) more than one number/char/boolean at a time?
(or all 3 types at once)
how do you also pass(call) more than one number/char/boolean at a time?
(or all 3 types at once)
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Junior Poster in Training
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Originally Posted by jerbo
Try this (in reference to passing the variable):
public class work { public static void main (String [] args) { boolean booleanAnswer; int number = 1; // Passes copy of number to ifstate booleanAnswer = ifstate(number); } public static boolean ifstate(int passedNumber) { if ( passedNumber == 0 ) //blah blah } Let me know if it is not clear }//end class
OK, here we go.
The reason for the boolean is you declared 'ifstate' with a return type of boolean. In reality, your "blah blah" (which I assume is shorthand for the remaining code in your method,) would contain a return statement of type boolean.
Where did you place "int number = 1;" when you placed it outside of main?
If you placed it outside of main, it should look like this:
public class work {
int number = 1; // Creates the variable outside of the class
public static void main (String [] args) {
boolean booleanAnswer;
// Passes copy of number to ifstate
booleanAnswer = ifstate(number);
}
public static boolean ifstate(int passedNumber) {
if ( passedNumber == 0 )
//blah blah
}
Let me know if it is not clear
}//end classTo declare and pass multiple parameters you separate them with a coma.
Java Syntax (Toggle Plain Text)
Note, in my example above, I passed an Integer, a Double, and a String value. Also, since I have a 'void' return type I did not need to assign anything. I just called the method by specifying the name (and passing the parameters.)
My suggestion is to start reading some more on the basic syntax for Java.
Most of what I have tried to explaine to you is very basic, and you should be able to understand it better with a good book on Java.
If you have had any VB programming the consepts are simular.
Good Luck!
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