我遇到以下错误
frontend.java:12: error: non-static variable this cannot be referenced from a static context button.addActionListener(this); 1 error
这是主要和操作执行方法的代码
public static void main(String []args){
JFrame frame = new JFrame("new Screen");
JPanel panel = new JPanel();
JLabel label = new JLabel(new ImageIcon("appBackgroundIMG.png"));
JButton button = new JButton("Encrypt");
button.addActionListener(this); //this line has error
button.setBounds(290,300 ,120,30);
label.add(button);
label.setBounds(0,0,700 , 500);
panel.add(label);
panel.setLayout(new FlowLayout());
frame.add(panel);
frame.setBounds(0,0,700 , 500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setResizable(false);
frame.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
System.out.println("Hello");
}
请注意,我不是非常有经验,所以如果有一些愚蠢的错误,请不要生气…… 我要去哪里错了?