每次按下JButton时，如何增加JTextField中的数字？

Question

    private void vote1ActionPerformed(java.awt.event.ActionEvent evt) {                                      
    int vote1 = 0;
    int vote2 = 0;
    if (koonchk.isSelected()){
        vote1++;
    koontf.setText(Integer.toString(vote1));

    }
    else if (baamchk.isSelected()){
        vote2++;
    baamtf.setText(Integer.toString(vote2));

    }


}                                     

How do I increase the number in the JTextField every time I press the JButton ?

Answer 1

You need to store int vote1 and vote2 outside of your method for vote1ActionPerformed , so that you dont reset the vote count to 0 every time.

That way its really easy to update it to a bigger number each time. For example this would work:

//Moved vote1/2 here outside of the method
static int vote1 = 0;
static int vote2 = 0;

    private void vote1ActionPerformed(java.awt.event.ActionEvent evt){                                      
        //We removed vote1 and vote2 from here and put them above
        if (koonchk.isSelected()){
        vote1++;
        koontf.setText(Integer.toString(vote1));
        }
        else if (baamchk.isSelected()){
        vote2++;
        baamtf.setText(Integer.toString(vote2));
        }
    }