如何在ActionListener中创建类似lambda的模式

Question

jButton.addActionListener(ae -> callAnyMethod());

CustomButton.CustomButtonListener(placeholder method (); ) 

CustomButton.CustomButtonListener(def());

作为方法存储在CustomButton类中的ActionListener：

public void CustomButtonListener(Object object){

        addActionListener(new ActionListener(){

@Override
        public void actionPerformed(ActionEvent e) {



          // how to call the method stored in the Object "object" here? and actually run it?



            }
    });

和按钮中的代码段：

CustomButton button = new CustomButton();

button.CustomButtonListener(def());





public void def(){

    String a = "lambda!";

            System.out.print("a");



}

Answer 1

如果我没有误解你的问题，你的语法已经正确了。

public static void main() {
    ...
    jButton.addActionListener(e -> myListener());
    ...
}
...
public void myListener(){
    dosomething();
}

这是它的简写：

public static void main() {
    ...
    MyListener myListener = new MyListener();
    jButton.addActionListener(myListener);
    ...
}

public class MyListener implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
        dosomething();
    }
}

要了解更多信息，可以参考这个。