Java Set and Get variable in other function

Question

I'm trying to get a variable from another function in the same .java file.

This is an example:

public static void showWindow(User user)
{
    String checkList = null;

    if (user.getNetConnection().getBonus() >= 0.)
    {
        checkList = "variable1";
    }
    else
    {
        checkList = "variable2";
    }
    showCommunity(user, checkList);
}

private static void loadSingle()
{
    allSingle = new LinkedList<>();
    try (Connection con = DatabaseFactory.getInstance().getConnection();
        PreparedStatement statement = con.prepareStatement(checkList);
        ResultSet rset = statement.executeQuery())...(the rest of funcion here)

There is anyway to use the variable checklist from function showWindow inside the function loadSingle?

With php I can do it easy, but I'm newbie in java! Sorry if this is a so easy question! — Frank
– Frank, Commented Aug 7, 2015 at 18:21
Since it's a static method,if checkList is public you could access it by ClassName.checkList (although getters/setters are recommended) so its like ClassName.getCheckList(); considering they are in different class. If its the same class, just checkList or getCheckList(). — Fernando Martín Besteiro
– Fernando Martín Besteiro, Commented Aug 7, 2015 at 18:21
Yes, just use it. Since the local variable there is called checkBuffList and not checkList it must be a static variable in class scope, so you can access it in any method. — Tom
– Tom, Commented Aug 7, 2015 at 18:22
Sorry, inside the method, I did wrong with checkBuffList, error is only in the example... sorry for bad example! But I believe with the reply "Declare it outside of the method, this will work. I'm so noob in java! — Frank
– Frank, Commented Aug 7, 2015 at 18:40

cbender · Accepted Answer · 2015-08-07 18:33:30Z

4

Declare it outside of the method (I'm assuming you meant checkBuffList).

edited Aug 7, 2015 at 18:33

answered Aug 7, 2015 at 18:25

cbender

2,2611 gold badge16 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Tom Over a year ago

Too bad OP fixed it :D.

Frank Over a year ago

I have fixed it, sorry for the "checkBuffList"!

Frank Over a year ago

This is only one file of that I need to change, I'll learn more about java. I'm using PHP for a few years, but using with procedure and never with oriented object. I don't know why, oriented object does'n enter in my mind. Everyone says "Oriented object is good and easy" but I did so many things to try understand and when I start to understand I always think "Procedure is more easy" and back to procedure again! I need to stop it and learn oriented object!

Fernando Martín Besteiro · Accepted Answer · 2015-08-07 18:28:57Z

1

Not sure if what you made was just a typo or what, but you are defining a variable checkBuffList which you are never using.

If it is in fact a typo, what you should be able to do is defining a static variable and a getter, like this

private static String checkList;

public static String getCheckList(){
    return checkList;
}

So if you want to call it from the same class you can simply use checkList, but if you need it from an outside class simply call ClassName.getCheckList().

answered Aug 7, 2015 at 18:28

Fernando Martín Besteiro

7635 silver badges16 bronze badges

Collectives™ on Stack Overflow

Java Set and Get variable in other function

2 Answers 2

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related