关于lamada表达式的函数

Question

view.addEventListener(event->{
if (event instanceof IncEvent)
controller.inc();
else if(event instanceof DecEvent)
controller.dec();
});
这种函数的原型该如何定义？

Answer 1

new JButton().addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                
            }
        });