Making an Action Listener for a JButton as a method?

问题

How can I make this ActionListener into a method for a specific JButton?
(im aware its possible to throw it all in an method but yeah..hm.)

myJButton.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent e){
       //do stuff
    }
 });

thx y'all,

edit: thanks everyone for the quick responses, my explanation wasn't very clear.

I looked into the use of lambdas and it was pretty much what I was thinking of, though the other ways are great to know aswell.

myButton.addActionListener(e -> myButtonMethod());

public void myButtonMethod() {
    // code
}

Thank you again, everyone.
I'll try to be more clear and quicker next time.

回答1:

Again, your question remains unclear. Your code above has a method, one that code can be put into:

button1.addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent e) {
        // you can call any code you want here
    }
});

Or you could call a method of the outer class from that method:

button1.addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent e) {
        button1Method();
    }
});

// elsewhere
private void button1Method() {
    // TODO fill with code        
}

Or you could call a method of the inner anonymous class from that code

button1.addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent e) {
        button1Method();
    }

    private void button1Method() {
        // TODO fill with code
    }
});

Or you could use lambdas:

button2.addActionListener(e -> button2Method());

// elsewhere
private void button2Method() {
    // TODO fill with code
}

Or you could use a method reference:

button3.addActionListener(this::button3Method);

// elsewhere
private void button3Method(ActionEvent e) {
    // TODO fill with code        
}

Up to you to try to be clear on what exactly it is you're trying to do and what's preventing you from doing it.

来源：https://stackoverflow.com/questions/41069817/making-an-action-listener-for-a-jbutton-as-a-method

标签

java

swing

methods

actionlistener