单击JButton时Java中ActionListener方法中的FlowControl

Question

请有人向我解释ActionListener的控制流程，例如我们在类中向组件注册了t并实现了重写

 actionPerformed(ActionEvent e) 

现在我很困惑，当我们单击注册按钮时， addActionListener (this); what is the role of (this) addActionListener (this);

Answer 1

addActionListener (this)指示当前类实现ActionListener接口并提供actionPerformed(ActionEvent e)

例：

public class SampleListener implements ActionListener{
    public static void main(String[] args) {
        JButton btn1 = new JButton("Click me");
        btn1.addActionListener(this);
    }
    @Override
    public void actionPerformed(ActionEvent event) {
        // code
    }
}