如何在actionPerformed按钮中加入'public int'？

Question

This is some ode that after declaring values in the fields.getText() it calculates a formula by a recursion function. However java does not see to like having any 'public' under actionPerformed button. I've never used one of these...but you do you think an ActionListener could do the job? Any ideas?

private void calculateButtonActionPerformed(java.awt.event.ActionEvent evt) {

         public int Method() { //underlined red
            int n = Integer.parseInt(objectsChooseField.getText());
            int r = Integer.parseInt(chooseFromField.getText());
            int result = C( n, r );
        }

        public int C( int n, int r ) { //underlined
            int res = faculty( n ) / ( faculty( r ) * ( n - r ));
            return res;
        }

        public int faculty( n ) { //underlined
            if ( n > 1 )
                return n * faculty( n - 1 );
            return 1;
        }

    }

EDIT:

I think I'm might have taken Joe's answer a little to literally...but do you mean something like this...?

public int Method() { //moved above actionPerformed

private void calculateButtonActionPerformed(java.awt.event.ActionEvent evt) {

                int n = Integer.parseInt(objectsChooseField.getText()); //continued method?
                int r = Integer.parseInt(chooseFromField.getText());
                int result = C( n, r );
            }
//rest of code below

Answer 1

You can't put methods inside of another method in Java. Move those 3 methods outside of, and at the same level as, calculateButtonActionPerformed() . You can then call them from within calculateButtonActionPerformed() .

For example, you can't do this in Java:

public void method1() {
    public void method2() {
    }
}

You have to do this:

public void method1() {
}

public void method2() {
}

Answer 2

public int method() { //your handlers
}
public int c(int n, int r) { //your handlers
}
public int faculty(int n) { //your handlers
}
public void calculateButtonActionPerformed(ActionEvent e) {
    method();
}

This is what Joe F explained in his answer. Try it this way.