当用户单击GUI中的按钮时，我想打开一个图像

Question

单击按钮后，我正在尝试使图像在框架中打开，到目前为止，我已将图像放入希望单击以打开的按钮中的JLabel中。 但是它立即显示出来。 关于如何设置它以便单击“剪刀”按钮后打开图像的任何想法？

    btnPlaySci = new JButton ("Scissors!");
    btnPlaySci.setBounds(180, 40, 110, 20);
    btnPlaySci.addActionListener(new PlaySciHandler());
    panel.add (btnPlaySci);
    btnPlaySci.setForeground(Color.MAGENTA);

    //below is my image, and above is the button I want it to open to

    ImageIcon rock1 = new ImageIcon("rock.jpg");
    JLabel picture = new JLabel(rock1);
    picture.setBounds(60, 200, 400, 400);
    panel.add(picture);

编辑后的代码粘贴到注释中

class PlaySciHandler implements ActionListener {
        public void actionPerformed(ActionEvent event) {
            String computerRand = sps.computerChoice(); 
            txtComputerRand.setText(computerRand); 
            String result = sps.play(Sps.SCISSORS); 
            txtResult.setText(result); 
            ImageIcon rock1 = new ImageIcon("rock.jpg"); 
            JLabel picture = new JLabel(rock1); 
            picture.setBounds(60, 200, 400, 400); panel.add(picture); 
        }
    }

Answer 1

我认为您希望在单击按钮时将JLabel（包含图像）添加到面板中。

您将必须编写以下类的代码，该类将在用户单击按钮“ btnPlaySci”时处理事件。

btnPlaySci.addActionListener(new PlaySciHandler(panel)); //replace your addActionListener line with this code.

import java.awt.event.*;
class PlaySciHandler implements ActionListener 
{
    JPanel panel;
    PlaySciHandler(JPanel p)
    {
         panel = p;
    }
    public void actionPerformed(ActionEvent ae)   
    {
      ImageIcon rock1 = new ImageIcon("rock.jpg");
      JLabel picture = new JLabel(rock1);
      picture.setBounds(60, 200, 400, 400);
      panel.add(picture);   
    } 
}