类型（className）中的方法（方法）不适用于参数（int）

Question

我一直收到一个似乎无法解决的错误。它出现在“showSlide（elementNum）;”线。

public class SlideGUI extends JPanel{


    fillSlide(); 
    showSlide();   

  }

    private class EventListener implements ActionListener{
      public void actionPerformed(ActionEvent e){
        if (e.getSource() == nextButton){
          elementNum++;

          if(elementNum == slides.length){
            elementNum = 0; //make index number 0 (the first slide)

        }
        }
     showSlide(elementNum);        
    }
  }


  public void fillSlide(){            

    slides[0] = new Slide("Halong Bay.jpg",new Color(49,57,74),"Halong Bay From     Lookout Point");
    slides[1] = new Slide("Minion.jpg",new Color(3,28,75),"Minion Balloon");
    slides[2] = new Slide("Ice Cream.jpg",new Color(13,54,72),"Chocolate Ice Cream with Yoghurt and Coffee Jelly");
  }

  public void showSlide(){

    imageLabel.setIcon(slides[elementNum].getImage());
    captionLabel.setText(slides[elementNum].getCaption());

    lowerPanel.setBackground(slides[elementNum].getColour());
    upperPanel.setBackground(slides[elementNum].getColour());
    moveOnPanel.setBackground(slides[elementNum].getColour());
    moveBackPanel.setBackground(slides[elementNum].getColour());
    picturePanel.setBackground(slides[elementNum].getColour());

  }
}

Answer 1

您使用参数调用showSlide()，但您声明它没有参数。