为什么我的动作监听器不起作用/

Question

为什么当您单击“Rock”按钮时，此actionlistener不显示弹出框？溶液

ClickListener cl1 = new ClickListener();    
JPanel panel1 = new JPanel();
    JButton Rock = new JButton("Rock");
    Rock.addActionListener(cl1);
    panel1.add(Rock);
    this.add(panel1);
    this.setVisible(true);
}
private class ClickListener implements ActionListener{

    public void actionPerformed(ActionEvent e){
        if(e.getSource() == "Rock"){
            int AI = new Random().nextInt(3) + 1;
            JOptionPane.showMessageDialog(null, "I have been clicked!");
        }
    }
}

}

Answer 1

使用

if("Rock".equals(e.getActionCommand()){

只要您没有为按钮显式设置action命令，e.getActionCommand()将返回您传递给它的构造函数的字符串文本。