如何在另一种方法中调用一个方法的整数？

Question

I'm fairly new to programming with Java... but this has really got me stumped, I've searched for a while and I could not find a clear answer to what I was looking for... but let's say I have two methods

public static void program1 (String[] args) {
    Integer intMoney;
    intMoney = 500;
}

public static void program2 (String[] args) {
    String strYes;
    strYes = JOptionPane.showInputDialog("type yes to subtract 100");
    if((strYes.equals("Yes") || (strYes.equals("yes")))) {
    /*((This is where I call the intMoney from program1) */ - 100;
    }else{
        JOptionPane.showMessageDialog(null, "Thats not yes!");
    }
}

And here is where I get really stuck.. say I have another method like program1, But how can I call on the intMoney value in program1 in another method?

Let's say I have a program and I want intMoney to be declared in a separate method so that when the Method program2 gets repeated the intMoney value wont change and it will be the same when the method is called on again.

Answer 1

First of all your program is totally out of rules and regulation having so many mistakes:

1. intMoney has function scope.So, it cannot be called from outside the function program1() . You have to return value from this function to use in another function.

2. In your if you are checking 2 condition separated by || but both conditions are same.Use one please.

    public static int program1 () { Integer intMoney; intMoney = 500; return intMoney; } public static void program2 () { String strYes; strYes = JOptionPane.showInputDialog("type yes to subtract 100"); if((strYes.equals("Yes") || (strYes.equals("yes")))); { program1() - 100 }else{ JOptionPane.showMessageDialog(null, "Thats not yes!"); } } 

Answer 2

You can' access access the variable in program1 since it't scoped to the method. You should do something like this:

public class Foo {
    public static Integer intMoney;

    public static void program1(String[] args) {
        intMoney = 500;
    }

    public static void program2(String[] args) {
        String strYes;
        strYes = JOptionPane.showInputDialog("type yes to subtract 100");
        if ((strYes.equals("Yes") || (strYes.equals("yes"))))
        {
            Integer i = intMoney;
            Integer x = i - 100;

        }else{
            JOptionPane.showMessageDialog(null, "Thats not yes!");

        }
    }
}

Of course now you need to call program1 first in order for the variable to be set. You could also just initiate it like this public static final Integer intMoney = 500 ;

Also, what's with the String[] args parameters if you are not using them?